linux-2.6-microblaze.git
2 years agoperf tests stat+json_output: Include sanity check for topology
Athira Rajeev [Thu, 6 Oct 2022 15:51:49 +0000 (21:21 +0530)]
perf tests stat+json_output: Include sanity check for topology

Testcase stat+json_output.sh fails in powerpc:

86: perf stat JSON output linter : FAILED!

The testcase "stat+json_output.sh" verifies perf stat JSON output. The
test covers aggregation modes like per-socket, per-core, per-die, -A
(no_aggr mode) along with few other tests. It counts expected fields for
various commands. For example say -A (i.e, AGGR_NONE mode), expects 7
fields in the output having "CPU" as first field. Same way, for
per-socket, it expects the first field in result to point to socket id.
The testcases compares the result with expected count.

The values for socket, die, core and cpu are fetched from topology
directory:

  /sys/devices/system/cpu/cpu*/topology.

For example, socket value is fetched from "physical_package_id" file of
topology directory.  (cpu__get_topology_int() in util/cpumap.c)

If a platform fails to fetch the topology information, values will be
set to -1. For example, incase of pSeries platform of powerpc, value for
"physical_package_id" is restricted and not exposed. So, -1 will be
assigned.

Perf code has a checks for valid cpu id in "aggr_printout"
(stat-display.c), which displays the fields. So, in cases where topology
values not exposed, first field of the output displaying will be empty.
This cause the testcase to fail, as it counts  number of fields in the
output.

Incase of -A (AGGR_NONE mode,), testcase expects 7 fields in the output,
becos of -1 value obtained from topology files for some, only 6 fields
are printed. Hence a testcase failure reported due to mismatch in number
of fields in the output.

Patch here adds a sanity check in the testcase for topology.  Check will
help to skip the test if -1 value found.

Fixes: 0c343af2a2f82844 ("perf test: JSON format checking")
Reported-by: Disha Goel <disgoel@linux.vnet.ibm.com>
Suggested-by: Ian Rogers <irogers@google.com>
Suggested-by: James Clark <james.clark@arm.com>
Signed-off-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Claire Jensen <cjense@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nageswara R Sastry <rnsastry@linux.ibm.com>
Link: https://lore.kernel.org/r/20221006155149.67205-2-atrajeev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf tests stat+csv_output: Include sanity check for topology
Athira Rajeev [Thu, 6 Oct 2022 15:51:48 +0000 (21:21 +0530)]
perf tests stat+csv_output: Include sanity check for topology

Testcase stat+csv_output.sh fails in powerpc:

84: perf stat CSV output linter: FAILED!

The testcase "stat+csv_output.sh" verifies perf stat CSV output. The
test covers aggregation modes like per-socket, per-core, per-die, -A
(no_aggr mode) along with few other tests. It counts expected fields for
various commands. For example say -A (i.e, AGGR_NONE mode), expects 7
fields in the output having "CPU" as first field. Same way, for
per-socket, it expects the first field in result to point to socket id.
The testcases compares the result with expected count.

The values for socket, die, core and cpu are fetched from topology
directory:

  /sys/devices/system/cpu/cpu*/topology.

For example, socket value is fetched from "physical_package_id" file of
topology directory.  (cpu__get_topology_int() in util/cpumap.c)

If a platform fails to fetch the topology information, values will be
set to -1. For example, incase of pSeries platform of powerpc, value for
"physical_package_id" is restricted and not exposed. So, -1 will be
assigned.

Perf code has a checks for valid cpu id in "aggr_printout"
(stat-display.c), which displays the fields. So, in cases where topology
values not exposed, first field of the output displaying will be empty.
This cause the testcase to fail, as it counts  number of fields in the
output.

Incase of -A (AGGR_NONE mode,), testcase expects 7 fields in the output,
becos of -1 value obtained from topology files for some, only 6 fields
are printed. Hence a testcase failure reported due to mismatch in number
of fields in the output.

Patch here adds a sanity check in the testcase for topology.  Check will
help to skip the test if -1 value found.

Fixes: 7473ee56dbc91c98 ("perf test: Add checking for perf stat CSV output.")
Reported-by: Disha Goel <disgoel@linux.vnet.ibm.com>
Suggested-by: Ian Rogers <irogers@google.com>
Suggested-by: James Clark <james.clark@arm.com>
Signed-off-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Claire Jensen <cjense@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nageswara R Sastry <rnsastry@linux.ibm.com>
Link: https://lore.kernel.org/r/20221006155149.67205-1-atrajeev@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf intel-pt: Fix system_wide dummy event for hybrid
Adrian Hunter [Wed, 12 Oct 2022 08:22:59 +0000 (11:22 +0300)]
perf intel-pt: Fix system_wide dummy event for hybrid

User space tasks can migrate between CPUs, so when tracing selected CPUs,
system-wide sideband is still needed, however evlist->core.has_user_cpus
is not set in the hybrid case, so check the target cpu_list instead.

Fixes: 7d189cadbeebc778 ("perf intel-pt: Track sideband system-wide when needed")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221012082259.22394-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf intel-pt: Fix segfault in intel_pt_print_info() with uClibc
Adrian Hunter [Wed, 12 Oct 2022 08:22:58 +0000 (11:22 +0300)]
perf intel-pt: Fix segfault in intel_pt_print_info() with uClibc

uClibc segfaulted because NULL was passed as the format to fprintf().

That happened because one of the format strings was missing and
intel_pt_print_info() didn't check that before calling fprintf().

Add the missing format string, and check format is not NULL before calling
fprintf().

Fixes: 11fa7cb86b56d361 ("perf tools: Pass Intel PT information for decoding MTC and CYC")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221012082259.22394-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: Fix attr tests for PERF_FORMAT_LOST
James Clark [Wed, 12 Oct 2022 09:46:32 +0000 (10:46 +0100)]
perf test: Fix attr tests for PERF_FORMAT_LOST

Since PERF_FORMAT_LOST was added, the default read format has that bit
set, so add it to the tests. Keep the old value as well so that the test
still passes on older kernels.

This fixes the following failure:

  expected read_format=0|4, got 20
  FAILED './tests/attr/test-record-C0' - match failure

Fixes: 85b425f31c8866e0 ("perf record: Set PERF_FORMAT_LOST by default")
Signed-off-by: James Clark <james.clark@arm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221012094633.21669-2-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Add 9 tests
Ammy Yi [Fri, 14 Oct 2022 17:09:05 +0000 (20:09 +0300)]
perf test: test_intel_pt.sh: Add 9 tests

Add tests:
Test with MTC and TSC disabled
Test with branches disabled
Test with/without CYC
Test recording with sample mode
Test with kernel trace
Test virtual LBR
Test power events
Test with TNT packets disabled
Test with event_trace

These tests mostly check that perf record works with the corresponding
Intel PT config terms, sometimes also checking that certain packets do or
do not appear in the resulting trace as appropriate.

The "Test virtual LBR" is slightly trickier, using a Python script to
check that branch stacks are actually synthesized.

Signed-off-by: Ammy Yi <ammy.yi@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-8-adrian.hunter@intel.com
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf inject: Fix GEN_ELF_TEXT_OFFSET for jit
Adrian Hunter [Fri, 14 Oct 2022 17:09:04 +0000 (20:09 +0300)]
perf inject: Fix GEN_ELF_TEXT_OFFSET for jit

When a program header was added, it moved the text section but
GEN_ELF_TEXT_OFFSET was not updated.

Fix by adding the program header size and aligning.

Fixes: babd04386b1df8c3 ("perf jit: Include program header in ELF files")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Lieven Hey <lieven.hey@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-7-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Add jitdump test
Adrian Hunter [Fri, 14 Oct 2022 17:09:03 +0000 (20:09 +0300)]
perf test: test_intel_pt.sh: Add jitdump test

Add a test for decoding self-modifying code using a jitdump file.

The test creates a workload that uses self-modifying code and generates its
own jitdump file.  The result is processed with perf inject --jit and
checked for decoding errors.

Note the test will fail without patch "perf inject: Fix GEN_ELF_TEXT_OFFSET
for jit" applied.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Tidy some alignment
Adrian Hunter [Fri, 14 Oct 2022 17:09:02 +0000 (20:09 +0300)]
perf test: test_intel_pt.sh: Tidy some alignment

Tidy alignment of test function lines to make them more readable.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Print a message when skipping kernel tracing
Adrian Hunter [Fri, 14 Oct 2022 17:09:01 +0000 (20:09 +0300)]
perf test: test_intel_pt.sh: Print a message when skipping kernel tracing

Messages display with the perf test -v option. Add a message to show when
skipping a test because the user cannot do kernel tracing.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Tidy some perf record options
Adrian Hunter [Fri, 14 Oct 2022 17:09:00 +0000 (20:09 +0300)]
perf test: test_intel_pt.sh: Tidy some perf record options

When not decoding, the options "-B -N --no-bpf-event" speed up perf record.
Make a common function for them.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: test_intel_pt.sh: Fix return checking again
Adrian Hunter [Fri, 14 Oct 2022 17:08:59 +0000 (20:08 +0300)]
perf test: test_intel_pt.sh: Fix return checking again

count_result() does not always reset ret=0 which means the value can spill
into the next test result.

Fix by explicitly setting it to zero between tests.

Committer testing:

  # perf test "Miscellaneous Intel PT testing"
  110: Miscellaneous Intel PT testing               : Ok
  #

Tested as well with:

  # perf test -v "Miscellaneous Intel PT testing"

Fixes: fd9b45e39cfaf885 ("perf test: test_intel_pt.sh: Fix return checking")
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20221014170905.64069-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf: Skip and warn on unknown format 'configN' attrs
Rob Herring [Tue, 4 Oct 2022 19:12:35 +0000 (14:12 -0500)]
perf: Skip and warn on unknown format 'configN' attrs

If the kernel exposes a new perf_event_attr field in a format attr, perf
will return an error stating the specified PMU can't be found. For
example, a format attr with 'config3:0-63' causes an error as config3 is
unknown to perf. This causes a compatibility issue between a newer
kernel with older perf tool.

Before this change with a kernel adding 'config3' I get:

  $ perf record -e arm_spe// -- true
  event syntax error: 'arm_spe//'
                       \___ Cannot find PMU `arm_spe'. Missing kernel support?
  Run 'perf list' for a list of valid events

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

      -e, --event <event>   event selector. use 'perf list' to list
  available events

After this change, I get:

  $ perf record -e arm_spe// -- true
  WARNING: 'arm_spe_0' format 'inv_event_filter' requires 'perf_event_attr::config3' which is not supported by this version of perf!
  [ perf record: Woken up 2 times to write data ]
  [ perf record: Captured and wrote 0.091 MB perf.data ]

To support unknown configN formats, rework the YACC implementation to
pass any config[0-9]+ format to perf_pmu__new_format() to handle with a
warning.

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220914-arm-perf-tool-spe1-2-v2-v4-1-83c098e6212e@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf list: Fix metricgroups title message
Andi Kleen [Tue, 4 Oct 2022 19:26:34 +0000 (12:26 -0700)]
perf list: Fix metricgroups title message

  $ perf list metricgroups

gives

  List of pre-defined events (to be used in -e):

  Metric Groups:

  Backend
  Bad
  BadSpec

But that's incorrect of course because metric groups or metrics can only
be specified with -M. So fix the message to say -e or -M

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20221004192634.998984-1-ak@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf mem: Fix -C option behavior for perf mem record
Namhyung Kim [Tue, 4 Oct 2022 20:02:11 +0000 (13:02 -0700)]
perf mem: Fix -C option behavior for perf mem record

The -C/--cpu option was maily for report but it also affected record as
it ate the option.  So users needed to use "--" after perf mem record to
pass the info to the perf record properly.

Check if this option is set for record, and pass it to the actual perf
record.

Before)
  $ sudo perf --debug perf-event-open mem record -C 0 2>&1 | grep -a sys_perf_event_open
  ...
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 4
  sys_perf_event_open: pid -1  cpu 1  group_fd -1  flags 0x8 = 5
  sys_perf_event_open: pid -1  cpu 2  group_fd -1  flags 0x8 = 6
  sys_perf_event_open: pid -1  cpu 3  group_fd -1  flags 0x8 = 7
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 8
  sys_perf_event_open: pid -1  cpu 1  group_fd -1  flags 0x8 = 9
  sys_perf_event_open: pid -1  cpu 2  group_fd -1  flags 0x8 = 10
  sys_perf_event_open: pid -1  cpu 3  group_fd -1  flags 0x8 = 11
  ...

After)
  $ sudo perf --debug perf-event-open mem record -C 0 2>&1 | grep -a sys_perf_event_open
  ...
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 4
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 5
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 6
  sys_perf_event_open: pid -1  cpu 0  group_fd -1  flags 0x8 = 7

Reported-by: Ravi Bangoria <ravi.bangoria@amd.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221004200211.1444521-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf annotate: Add missing condition flags for arm64
Namhyung Kim [Thu, 6 Oct 2022 22:22:32 +0000 (15:22 -0700)]
perf annotate: Add missing condition flags for arm64

According to the document [1], it can also have 'hs', 'lo', 'vc', 'vs' as a
condition code.  Let's add them too.

[1] https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/condition-codes-1-condition-flags-and-codes

Reported-by: Kevin Nomura <nomurak@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20221006222232.266416-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agolibperf: Do not include non-UAPI linux/compiler.h header
Arnaldo Carvalho de Melo [Fri, 14 Oct 2022 13:39:21 +0000 (10:39 -0300)]
libperf: Do not include non-UAPI linux/compiler.h header

Its just for that __packed define, so use it expanded as __attribute__((packed)),
like the other files in /usr/include do.

This was problem was preventing building the libperf examples on ALT
Linux and Fedora 35, fix it.

Reported-by: Vitaly Chikunov <vt@altlinux.org>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Dmitry Levin <ldv@altlinux.org
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/Y0lnpl2Ix7VljVDc@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf test: Fix test_arm_coresight.sh failures on Juno
James Clark [Wed, 5 Oct 2022 14:05:08 +0000 (15:05 +0100)]
perf test: Fix test_arm_coresight.sh failures on Juno

This test commonly fails on Arm Juno because the instruction interval
is large enough to miss generating any samples for Perf in system-wide
mode.

Fix this by lowering the interval until a comfortable number of Perf
instructions are generated. The test is still quick to run because only
a small amount of trace is gathered.

Before:

  sudo ./perf test coresight -vvv
  ...
  Recording trace with system wide mode
  Looking at perf.data file for dumping branch samples:
  Looking at perf.data file for reporting branch samples:
  Looking at perf.data file for instruction samples:
  CoreSight system wide testing: FAIL
  ...

After:

  sudo ./perf test coresight -vvv
  ...
  Recording trace with system wide mode
  Looking at perf.data file for dumping branch samples:
  Looking at perf.data file for reporting branch samples:
  Looking at perf.data file for instruction samples:
  CoreSight system wide testing: PASS
  ...

Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Link: https://lore.kernel.org/r/20221005140508.1537277-1-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoperf stat: Support old kernels for bperf cgroup counting
Namhyung Kim [Tue, 11 Oct 2022 05:28:08 +0000 (22:28 -0700)]
perf stat: Support old kernels for bperf cgroup counting

The recent change in the cgroup will break the backward compatiblity in
the BPF program.  It should support both old and new kernels using BPF
CO-RE technique.

Like the task_struct->__state handling in the offcpu analysis, we can
check the field name in the cgroup struct.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: bpf@vger.kernel.org
Cc: cgroups@vger.kernel.org
Cc: zefan li <lizefan.x@bytedance.com>
Link: http://lore.kernel.org/lkml/20221011052808.282394-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 years agoMerge tag 'drm-next-2022-10-14' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 14 Oct 2022 04:56:34 +0000 (21:56 -0700)]
Merge tag 'drm-next-2022-10-14' of git://anongit.freedesktop.org/drm/drm

Pull more drm updates from Dave Airlie:
 "Round of fixes for the merge window stuff, bunch of amdgpu and i915
  changes, this should have the gcc11 warning fix, amongst other
  changes.

  amdgpu:
   - DC mutex fix
   - DC SubVP fixes
   - DCN 3.2.x fixes
   - DCN 3.1.x fixes
   - SDMA 6.x fixes
   - Enable DPIA for 3.1.4
   - VRR fixes
   - VRAM BO swapping fix
   - Revert dirty fb helper change
   - SR-IOV suspend/resume fixes
   - Work around GCC array bounds check fail warning
   - UMC 8.10 fixes
   - Misc fixes and cleanups

  i915:
   - Round to closest in g4x+ HDMI clock readout
   - Update MOCS table for EHL
   - Fix PSR_IMR/IIR field handling
   - Fix watermark calculations for gen12+/DG2 modifiers
   - Reject excessive dotclocks early
   - Fix revocation of non-persistent contexts
   - Handle migration for dpt
   - Fix display problems after resume
   - Allow control over the flags when migrating
   - Consider DG2_RC_CCS_CC when migrating buffers"

* tag 'drm-next-2022-10-14' of git://anongit.freedesktop.org/drm/drm: (110 commits)
  drm/amd/display: Add HUBP surface flip interrupt handler
  drm/i915/display: consider DG2_RC_CCS_CC when migrating buffers
  drm/i915: allow control over the flags when migrating
  drm/amd/display: Simplify bool conversion
  drm/amd/display: fix transfer function passed to build_coefficients()
  drm/amd/display: add a license to cursor_reg_cache.h
  drm/amd/display: make virtual_disable_link_output static
  drm/amd/display: fix indentation in dc.c
  drm/amd/display: make dcn32_split_stream_for_mpc_or_odm static
  drm/amd/display: fix build error on arm64
  drm/amd/display: 3.2.207
  drm/amd/display: Clean some DCN32 macros
  drm/amdgpu: Add poison mode query for umc v8_10_0
  drm/amdgpu: Update umc v8_10_0 headers
  drm/amdgpu: fix coding style issue for mca notifier
  drm/amdgpu: define convert_error_address for umc v8.7
  drm/amdgpu: define RAS convert_error_address API
  drm/amdgpu: remove check for CE in RAS error address query
  drm/i915: Fix display problems after resume
  drm/amd/display: fix array-bounds error in dc_stream_remove_writeback() [take 2]
  ...

2 years agoMerge tag 'block-6.1-2022-10-13' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 14 Oct 2022 04:25:57 +0000 (21:25 -0700)]
Merge tag 'block-6.1-2022-10-13' of git://git.kernel.dk/linux

Pull more block updates from Jens Axboe:
 "Fixes that ended up landing later than the initial block pull request.
  Nothing really major in here:

   - NVMe pull request via Christoph:
        - add NVME_QUIRK_BOGUS_NID for Lexar NM760 (Abhijit)
        - add NVME_QUIRK_NO_DEEPEST_PS to avoid the deepest sleep state
          on ZHITAI TiPro5000 SSDs (Xi Ruoyao)
        - fix possible hang caused during ctrl deletion (Sagi Grimberg)
        - fix possible hang in live ns resize with ANA access (Sagi
          Grimberg)

   - Proactively avoid a sign extension issue with the queue flags
     (Brian)

   - Regression fix for hidden disks (Christoph)

   - Update OPAL maintainers entry (Jonathan)

   - blk-wbt regression initialization fix (Yu)"

* tag 'block-6.1-2022-10-13' of git://git.kernel.dk/linux:
  nvme-multipath: fix possible hang in live ns resize with ANA access
  nvme-pci: avoid the deepest sleep state on ZHITAI TiPro5000 SSDs
  nvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM760
  nvme-tcp: fix possible hang caused during ctrl deletion
  nvme-rdma: fix possible hang caused during ctrl deletion
  block: fix leaking minors of hidden disks
  block: avoid sign extend problem with default queue flags mask
  blk-wbt: fix that 'rwb->wc' is always set to 1 in wbt_init()
  block: Remove the repeat word 'can'
  MAINTAINERS: Update SED-Opal Maintainers

2 years agoMerge tag 'io_uring-6.1-2022-10-13' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 14 Oct 2022 04:15:30 +0000 (21:15 -0700)]
Merge tag 'io_uring-6.1-2022-10-13' of git://git.kernel.dk/linux

Pull more io_uring updates from Jens Axboe:
 "A collection of fixes that ended up either being later than the
  initial pull, or dependent on multiple branches (6.0-late being one of
  them) and hence deferred purposely. This contains:

   - Cleanup fixes for the single submitter late 6.0 change, which we
     pushed to 6.1 to keep the 6.0 changes small (Dylan, Pavel)

   - Fix for IORING_OP_CONNECT not handling -EINPROGRESS correctly (me)

   - Ensure that the zc sendmsg variant gets audited correctly (me)

   - Regression fix from this merge window where kiocb_end_write()
     doesn't always gets called, which can cause issues with fs freezing
     (me)

   - Registered files SCM handling fix (Pavel)

   - Regression fix for big sqe dumping in fdinfo (Pavel)

   - Registered buffers accounting fix (Pavel)

   - Remove leftover notification structures, we killed them off late in
     6.0 (Pavel)

   - Minor optimizations (Pavel)

   - Cosmetic variable shadowing fix (Stefan)"

* tag 'io_uring-6.1-2022-10-13' of git://git.kernel.dk/linux:
  io_uring/rw: ensure kiocb_end_write() is always called
  io_uring: fix fdinfo sqe offsets calculation
  io_uring: local variable rw shadows outer variable in io_write
  io_uring/opdef: remove 'audit_skip' from SENDMSG_ZC
  io_uring: optimise locking for local tw with submit_wait
  io_uring: remove redundant memory barrier in io_req_local_work_add
  io_uring/net: handle -EINPROGRESS correct for IORING_OP_CONNECT
  io_uring: remove notif leftovers
  io_uring: correct pinned_vm accounting
  io_uring/af_unix: defer registered files gc to io_uring release
  io_uring: limit registration w/ SINGLE_ISSUER
  io_uring: remove io_register_submitter
  io_uring: simplify __io_uring_add_tctx_node

2 years agoMerge tag 'amd-drm-fixes-6.1-2022-10-12' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Thu, 13 Oct 2022 21:47:25 +0000 (07:47 +1000)]
Merge tag 'amd-drm-fixes-6.1-2022-10-12' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

amd-drm-fixes-6.1-2022-10-12:

amdgpu:
- DC mutex fix
- DC SubVP fixes
- DCN 3.2.x fixes
- DCN 3.1.x fixes
- SDMA 6.x fixes
- Enable DPIA for 3.1.4
- VRR fixes
- VRAM BO swapping fix
- Revert dirty fb helper change
- SR-IOV suspend/resume fixes
- Work around GCC array bounds check fail warning
- UMC 8.10 fixes
- Misc fixes and cleanups

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221012162650.8810-1-alexander.deucher@amd.com
2 years agoMerge tag 'drm-intel-next-fixes-2022-10-13' of git://anongit.freedesktop.org/drm...
Dave Airlie [Thu, 13 Oct 2022 21:46:50 +0000 (07:46 +1000)]
Merge tag 'drm-intel-next-fixes-2022-10-13' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

- Fix revocation of non-persistent contexts (Tvrtko Ursulin)
- Handle migration for dpt (Matthew Auld)
- Fix display problems after resume (Thomas Hellström)
- Allow control over the flags when migrating (Matthew Auld)
- Consider DG2_RC_CCS_CC when migrating buffers (Matthew Auld)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y0gK9QmCmktLLzqp@tursulin-desk
2 years agoMerge tag 'devicetree-fixes-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 13 Oct 2022 19:22:42 +0000 (12:22 -0700)]
Merge tag 'devicetree-fixes-for-6.1-1' of git://git./linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Fixes for Mediatek MT6370 binding

 - Merge the DT overlay maintainer entry to the main entry as Pantelis
   is not active and Frank is taking a step back

* tag 'devicetree-fixes-for-6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  MAINTAINERS: of: collapse overlay entry into main device tree entry
  dt-bindings: mfd: mt6370: fix the interrupt order of the charger in the example
  dt-bindings: leds: mt6370: Fix MT6370 LED indicator DT warning

2 years agoMerge tag 'mmc-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Thu, 13 Oct 2022 19:19:18 +0000 (12:19 -0700)]
Merge tag 'mmc-v6.1-2' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Add SD card quirk for broken discard

  MMC host:
   - renesas_sdhi: Fix clock rounding errors
   - sdhci-sprd: Fix minimum clock limit to detect cards
   - sdhci-tegra: Use actual clock rate for SW tuning correction"

* tag 'mmc-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-sprd: Fix minimum clock limit
  mmc: sdhci-tegra: Use actual clock rate for SW tuning correction
  mmc: renesas_sdhi: Fix rounding errors
  mmc: core: Add SD card quirk for broken discard

2 years agoMerge tag 'docs-6.1-2' of git://git.lwn.net/linux
Linus Torvalds [Thu, 13 Oct 2022 17:58:32 +0000 (10:58 -0700)]
Merge tag 'docs-6.1-2' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
 "A handful of relatively simple documentation fixes, plus a set of
  patches catching the Chinese translation up with the front-page
  rework"

* tag 'docs-6.1-2' of git://git.lwn.net/linux:
  Documentation: rtla: Correct command line example
  docs/zh_CN: add a man-pages link to zh_CN/index.rst
  docs/zh_CN: Rewrite the Chinese translation front page
  docs/zh_CN: add zh_CN/arch.rst
  docs/zh_CN: promote the title of zh_CN/process/index.rst
  docs/zh_CN: Update the translation of page_owner to 6.0-rc7
  docs/zh_CN: Update the translation of ksm to 6.0-rc7
  docs/howto: Replace abundoned URL of gmane.org
  Documentation: ubifs: Fix compression idiom
  Documentation/mm/page_owner.rst: delete frequently changing experimental data
  docs/zh_CN: Fix build warning
  docs: ftrace: Correct access mode

2 years agoMerge tag 'net-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 13 Oct 2022 17:51:01 +0000 (10:51 -0700)]
Merge tag 'net-6.1-rc1' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from netfilter, and wifi.

Current release - regressions:

   - Revert "net/sched: taprio: make qdisc_leaf() see the
     per-netdev-queue pfifo child qdiscs", it may cause crashes when the
     qdisc is reconfigured

   - inet: ping: fix splat due to packet allocation refactoring in inet

   - tcp: clean up kernel listener's reqsk in inet_twsk_purge(), fix UAF
     due to races when per-netns hash table is used

  Current release - new code bugs:

   - eth: adin1110: check in netdev_event that netdev belongs to driver

   - fixes for PTR_ERR() vs NULL bugs in driver code, from Dan and co.

  Previous releases - regressions:

   - ipv4: handle attempt to delete multipath route when fib_info
     contains an nh reference, avoid oob access

   - wifi: fix handful of bugs in the new Multi-BSSID code

   - wifi: mt76: fix rate reporting / throughput regression on mt7915
     and newer, fix checksum offload

   - wifi: iwlwifi: mvm: fix double list_add at
     iwl_mvm_mac_wake_tx_queue (other cases)

   - wifi: mac80211: do not drop packets smaller than the LLC-SNAP
     header on fast-rx

  Previous releases - always broken:

   - ieee802154: don't warn zero-sized raw_sendmsg()

   - ipv6: ping: fix wrong checksum for large frames

   - mctp: prevent double key removal and unref

   - tcp/udp: fix memory leaks and races around IPV6_ADDRFORM

   - hv_netvsc: fix race between VF offering and VF association message

  Misc:

   - remove -Warray-bounds silencing in the drivers, compilers fixed"

* tag 'net-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (73 commits)
  sunhme: fix an IS_ERR() vs NULL check in probe
  net: marvell: prestera: fix a couple NULL vs IS_ERR() checks
  kcm: avoid potential race in kcm_tx_work
  tcp: Clean up kernel listener's reqsk in inet_twsk_purge()
  net: phy: micrel: Fixes FIELD_GET assertion
  openvswitch: add nf_ct_is_confirmed check before assigning the helper
  tcp: Fix data races around icsk->icsk_af_ops.
  ipv6: Fix data races around sk->sk_prot.
  tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
  udp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).
  tcp/udp: Fix memory leak in ipv6_renew_options().
  mctp: prevent double key removal and unref
  selftests: netfilter: Fix nft_fib.sh for all.rp_filter=1
  netfilter: rpfilter/fib: Populate flowic_l3mdev field
  selftests: netfilter: Test reverse path filtering
  net/mlx5: Make ASO poll CQ usable in atomic context
  tcp: cdg: allow tcp_cdg_release() to be called multiple times
  inet: ping: fix recent breakage
  ipv6: ping: fix wrong checksum for large frames
  net: ethernet: ti: am65-cpsw: set correct devlink flavour for unused ports
  ...

2 years agoMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Linus Torvalds [Thu, 13 Oct 2022 17:44:36 +0000 (10:44 -0700)]
Merge tag 'for_linus' of git://git./linux/kernel/git/mst/vhost

Pull virtio fixes from Michael Tsirkin:

 - Fix a regression in virtio pci on power

 - Add a reviewer for ifcvf

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vdpa/ifcvf: add reviewer
  virtio_pci: use irq to detect interrupt support

2 years agoMerge tag 'trace-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux...
Linus Torvalds [Thu, 13 Oct 2022 17:36:57 +0000 (10:36 -0700)]
Merge tag 'trace-v6.1-1' of git://git./linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Found that the synthetic events were using strlen/strscpy() on values
   that could have come from userspace, and that is bad.

   Consolidate the string logic of kprobe and eprobe and extend it to
   the synthetic events to safely process string addresses.

 - Clean up content of text dump in ftrace_bug() where the output does
   not make char reads into signed and sign extending the byte output.

 - Fix some kernel docs in the ring buffer code.

* tag 'trace-v6.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing: Fix reading strings from synthetic events
  tracing: Add "(fault)" name injection to kernel probes
  tracing: Move duplicate code of trace_kprobe/eprobe.c into header
  ring-buffer: Fix kernel-doc
  ftrace: Fix char print issue in print_ip_ins()

2 years agoMerge tag 'linux-watchdog-6.1-rc1' of git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Thu, 13 Oct 2022 17:31:13 +0000 (10:31 -0700)]
Merge tag 'linux-watchdog-6.1-rc1' of git://linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

 - new driver for Exar/MaxLinear XR28V38x

 - support for exynosautov9 SoC

 - support for Renesas R-Car V5H (R8A779G0) and RZ/V2M (r9a09g011) SoC

 - support for imx93

 - several other fixes and improvements

* tag 'linux-watchdog-6.1-rc1' of git://www.linux-watchdog.org/linux-watchdog: (36 commits)
  watchdog: twl4030_wdt: add missing mod_devicetable.h include
  dt-bindings: watchdog: migrate mt7621 text bindings to YAML
  watchdog: sp5100_tco: Add "action" module parameter
  watchdog: imx93: add watchdog timer on imx93
  watchdog: imx7ulp_wdt: init wdog when it was active
  watchdog: imx7ulp_wdt: Handle wdog reconfigure failure
  watchdog: imx7ulp_wdt: Fix RCS timeout issue
  watchdog: imx7ulp_wdt: Check CMD32EN in wdog init
  watchdog: imx7ulp: Add explict memory barrier for unlock sequence
  watchdog: imx7ulp: Move suspend/resume to noirq phase
  watchdog: rti-wdt:using the pm_runtime_resume_and_get to simplify the code
  dt-bindings: watchdog: rockchip: add rockchip,rk3128-wdt
  watchdog: s3c2410_wdt: support exynosautov9 watchdog
  dt-bindings: watchdog: add exynosautov9 compatible
  watchdog: npcm: Enable clock if provided
  watchdog: meson: keep running if already active
  watchdog: dt-bindings: atmel,at91sam9-wdt: convert to json-schema
  watchdog: armada_37xx_wdt: Fix .set_timeout callback
  watchdog: sa1100: make variable sa1100dog_driver static
  watchdog: w83977f_wdt: Fix comment typo
  ...

2 years agoMerge tag 'ceph-for-6.1-rc1' of https://github.com/ceph/ceph-client
Linus Torvalds [Thu, 13 Oct 2022 17:21:37 +0000 (10:21 -0700)]
Merge tag 'ceph-for-6.1-rc1' of https://github.com/ceph/ceph-client

Pull ceph updates from Ilya Dryomov:
 "A quiet round this time: several assorted filesystem fixes, the most
  noteworthy one being some additional wakeups in cap handling code, and
  a messenger cleanup"

* tag 'ceph-for-6.1-rc1' of https://github.com/ceph/ceph-client:
  ceph: remove Sage's git tree from documentation
  ceph: fix incorrectly showing the .snap size for stat
  ceph: fail the open_by_handle_at() if the dentry is being unlinked
  ceph: increment i_version when doing a setattr with caps
  ceph: Use kcalloc for allocating multiple elements
  ceph: no need to wait for transition RDCACHE|RD -> RD
  ceph: fail the request if the peer MDS doesn't support getvxattr op
  ceph: wake up the waiters if any new caps comes
  libceph: drop last_piece flag from ceph_msg_data_cursor

2 years agoMerge tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs
Linus Torvalds [Thu, 13 Oct 2022 16:58:42 +0000 (09:58 -0700)]
Merge tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs

Pull NFS client updates from Anna Schumaker:
 "New Features:
   - Add NFSv4.2 xattr tracepoints
   - Replace xprtiod WQ in rpcrdma
   - Flexfiles cancels I/O on layout recall or revoke

  Bugfixes and Cleanups:
   - Directly use ida_alloc() / ida_free()
   - Don't open-code max_t()
   - Prefer using strscpy over strlcpy
   - Remove unused forward declarations
   - Always return layout states on flexfiles layout return
   - Have LISTXATTR treat NFS4ERR_NOXATTR as an empty reply instead of
     error
   - Allow more xprtrdma memory allocations to fail without triggering a
     reclaim
   - Various other xprtrdma clean ups
   - Fix rpc_killall_tasks() races"

* tag 'nfs-for-6.1-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (27 commits)
  NFSv4/flexfiles: Cancel I/O if the layout is recalled or revoked
  SUNRPC: Add API to force the client to disconnect
  SUNRPC: Add a helper to allow pNFS drivers to selectively cancel RPC calls
  SUNRPC: Fix races with rpc_killall_tasks()
  xprtrdma: Fix uninitialized variable
  xprtrdma: Prevent memory allocations from driving a reclaim
  xprtrdma: Memory allocation should be allowed to fail during connect
  xprtrdma: MR-related memory allocation should be allowed to fail
  xprtrdma: Clean up synopsis of rpcrdma_regbuf_alloc()
  xprtrdma: Clean up synopsis of rpcrdma_req_create()
  svcrdma: Clean up RPCRDMA_DEF_GFP
  SUNRPC: Replace the use of the xprtiod WQ in rpcrdma
  NFSv4.2: Add a tracepoint for listxattr
  NFSv4.2: Add tracepoints for getxattr, setxattr, and removexattr
  NFSv4.2: Move TRACE_DEFINE_ENUM(NFS4_CONTENT_*) under CONFIG_NFS_V4_2
  NFSv4.2: Add special handling for LISTXATTR receiving NFS4ERR_NOXATTR
  nfs: remove nfs_wait_atomic_killable() and nfs_write_prepare() declaration
  NFSv4: remove nfs4_renewd_prepare_shutdown() declaration
  fs/nfs/pnfs_nfs.c: fix spelling typo and syntax error in comment
  NFSv4/pNFS: Always return layout stats on layout return for flexfiles
  ...

2 years agoMerge tag 'for-linus-6.1-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubca...
Linus Torvalds [Thu, 13 Oct 2022 16:56:14 +0000 (09:56 -0700)]
Merge tag 'for-linus-6.1-ofs1' of git://git./linux/kernel/git/hubcap/linux

Pull orangefs update from Mike Marshall:
 "Change iterate to iterate_shared"

* tag 'for-linus-6.1-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
  Orangefs: change iterate to iterate_shared

2 years agoDocumentation: rtla: Correct command line example
Pierre Gondois [Thu, 6 Oct 2022 08:44:09 +0000 (10:44 +0200)]
Documentation: rtla: Correct command line example

The '-t/-T' parameters seem to have been swapped:
-t/--trace[=file]: save the stopped trace
to [file|timerlat_trace.txt]
-T/--thread us: stop trace if the thread latency
is higher than the argument in us

Swap them back.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Acked-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Link: https://lore.kernel.org/r/20221006084409.3882542-1-pierre.gondois@arm.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2 years agosunhme: fix an IS_ERR() vs NULL check in probe
Dan Carpenter [Wed, 12 Oct 2022 15:01:32 +0000 (18:01 +0300)]
sunhme: fix an IS_ERR() vs NULL check in probe

The devm_request_region() function does not return error pointers, it
returns NULL on error.

Fixes: 914d9b2711dd ("sunhme: switch to devres")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Link: https://lore.kernel.org/r/Y0bWzJL8JknX8MUf@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: marvell: prestera: fix a couple NULL vs IS_ERR() checks
Dan Carpenter [Wed, 12 Oct 2022 15:00:59 +0000 (18:00 +0300)]
net: marvell: prestera: fix a couple NULL vs IS_ERR() checks

The __prestera_nexthop_group_create() function returns NULL on error
and the prestera_nexthop_group_get() returns error pointers.  Fix these
two checks.

Fixes: 0a23ae237171 ("net: marvell: prestera: Add router nexthops ABI")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/Y0bWq+7DoKK465z8@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agokcm: avoid potential race in kcm_tx_work
Eric Dumazet [Wed, 12 Oct 2022 13:34:12 +0000 (13:34 +0000)]
kcm: avoid potential race in kcm_tx_work

syzbot found that kcm_tx_work() could crash [1] in:

/* Primarily for SOCK_SEQPACKET sockets */
if (likely(sk->sk_socket) &&
    test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
<<*>> clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
sk->sk_write_space(sk);
}

I think the reason is that another thread might concurrently
run in kcm_release() and call sock_orphan(sk) while sk is not
locked. kcm_tx_work() find sk->sk_socket being NULL.

[1]
BUG: KASAN: null-ptr-deref in instrument_atomic_write include/linux/instrumented.h:86 [inline]
BUG: KASAN: null-ptr-deref in clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
BUG: KASAN: null-ptr-deref in kcm_tx_work+0xff/0x160 net/kcm/kcmsock.c:742
Write of size 8 at addr 0000000000000008 by task kworker/u4:3/53

CPU: 0 PID: 53 Comm: kworker/u4:3 Not tainted 5.19.0-rc3-next-20220621-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kkcmd kcm_tx_work
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
kasan_report+0xbe/0x1f0 mm/kasan/report.c:495
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
instrument_atomic_write include/linux/instrumented.h:86 [inline]
clear_bit include/asm-generic/bitops/instrumented-atomic.h:41 [inline]
kcm_tx_work+0xff/0x160 net/kcm/kcmsock.c:742
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
</TASK>

Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Tom Herbert <tom@herbertland.com>
Link: https://lore.kernel.org/r/20221012133412.519394-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agotcp: Clean up kernel listener's reqsk in inet_twsk_purge()
Kuniyuki Iwashima [Wed, 12 Oct 2022 14:50:36 +0000 (07:50 -0700)]
tcp: Clean up kernel listener's reqsk in inet_twsk_purge()

Eric Dumazet reported a use-after-free related to the per-netns ehash
series. [0]

When we create a TCP socket from userspace, the socket always holds a
refcnt of the netns.  This guarantees that a reqsk timer is always fired
before netns dismantle.  Each reqsk has a refcnt of its listener, so the
listener is not freed before the reqsk, and the net is not freed before
the listener as well.

OTOH, when in-kernel users create a TCP socket, it might not hold a refcnt
of its netns.  Thus, a reqsk timer can be fired after the netns dismantle
and access freed per-netns ehash.

To avoid the use-after-free, we need to clean up TCP_NEW_SYN_RECV sockets
in inet_twsk_purge() if the netns uses a per-netns ehash.

[0]: https://lore.kernel.org/netdev/CANn89iLXMup0dRD_Ov79Xt8N9FM0XdhCHEN05sf3eLwxKweM6w@mail.gmail.com/

BUG: KASAN: use-after-free in tcp_or_dccp_get_hashinfo
include/net/inet_hashtables.h:181 [inline]
BUG: KASAN: use-after-free in reqsk_queue_unlink+0x320/0x350
net/ipv4/inet_connection_sock.c:913
Read of size 8 at addr ffff88807545bd80 by task syz-executor.2/8301

CPU: 1 PID: 8301 Comm: syz-executor.2 Not tainted
6.0.0-syzkaller-02757-gaf7d23f9d96a #0
Hardware name: Google Google Compute Engine/Google Compute Engine,
BIOS Google 09/22/2022
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:317 [inline]
print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
tcp_or_dccp_get_hashinfo include/net/inet_hashtables.h:181 [inline]
reqsk_queue_unlink+0x320/0x350 net/ipv4/inet_connection_sock.c:913
inet_csk_reqsk_queue_drop net/ipv4/inet_connection_sock.c:927 [inline]
inet_csk_reqsk_queue_drop_and_put net/ipv4/inet_connection_sock.c:939 [inline]
reqsk_timer_handler+0x724/0x1160 net/ipv4/inet_connection_sock.c:1053
call_timer_fn+0x1a0/0x6b0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x674/0xa80 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1d0/0x9c8 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
</IRQ>

Fixes: d1e5e6408b30 ("tcp: Introduce optional per-netns ehash.")
Reported-by: syzbot <syzkaller@googlegroups.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221012145036.74960-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMAINTAINERS: of: collapse overlay entry into main device tree entry
Frank Rowand [Wed, 12 Oct 2022 22:05:48 +0000 (17:05 -0500)]
MAINTAINERS: of: collapse overlay entry into main device tree entry

Pantelis has not been active in recent years so no need to maintain
a separate entry for device tree overlays.

Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Link: https://lore.kernel.org/r/20221012220548.4163865-1-frowand.list@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
2 years agovdpa/ifcvf: add reviewer
Michael S. Tsirkin [Wed, 12 Oct 2022 04:49:23 +0000 (00:49 -0400)]
vdpa/ifcvf: add reviewer

Zhu Lingshan has been writing and reviewing ifcvf patches for
a while now, add as reviewer.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2 years agovirtio_pci: use irq to detect interrupt support
Michael S. Tsirkin [Wed, 12 Oct 2022 21:58:28 +0000 (17:58 -0400)]
virtio_pci: use irq to detect interrupt support

commit 71491c54eafa ("virtio_pci: don't try to use intxif pin is zero")
breaks virtio_pci on powerpc, when running as a qemu guest.

vp_find_vqs() bails out because pci_dev->pin == 0.

But pci_dev->irq is populated correctly, so vp_find_vqs_intx() would
succeed if we called it - which is what the code used to do.

This seems to happen because pci_dev->pin is not populated in
pci_assign_irq(). A PCI core bug? Maybe.

However Linus said:
I really think that that is basically the only time you should use
that 'pci_dev->pin' thing: it basically exists not for "does this
device have an IRQ", but for "what is the routing of this irq on this
device".

and
The correct way to check for "no irq" doesn't use NO_IRQ at all, it just does
if (dev->irq) ...

so let's just check irq and be done with it.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Fixes: 71491c54eafa ("virtio_pci: don't try to use intxif pin is zero")
Cc: "Angus Chen" <angus.chen@jaguarmicro.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221012220312.308522-1-mst@redhat.com>

2 years agoMerge tag 'wireless-2022-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git...
Paolo Abeni [Thu, 13 Oct 2022 11:19:41 +0000 (13:19 +0200)]
Merge tag 'wireless-2022-10-13' of git://git./linux/kernel/git/wireless/wireless

Johannes Berg says:

====================
More wireless fixes for 6.1

This has only the fixes for the scan parsing issues.

* tag 'wireless-2022-10-13' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: cfg80211: update hidden BSSes to avoid WARN_ON
  wifi: mac80211: fix crash in beacon protection for P2P-device
  wifi: mac80211_hwsim: avoid mac80211 warning on bad rate
  wifi: cfg80211: avoid nontransmitted BSS list corruption
  wifi: cfg80211: fix BSS refcounting bugs
  wifi: cfg80211: ensure length byte is present before access
  wifi: mac80211: fix MBSSID parsing use-after-free
  wifi: cfg80211/mac80211: reject bad MBSSID elements
  wifi: cfg80211: fix u8 overflow in cfg80211_update_notlisted_nontrans()
====================

Link: https://lore.kernel.org/r/20221013100522.46346-1-johannes@sipsolutions.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2 years agoMerge branch 'cve-fixes-2022-10-13'
Johannes Berg [Thu, 13 Oct 2022 09:59:16 +0000 (11:59 +0200)]
Merge branch 'cve-fixes-2022-10-13'

Pull in the fixes for various scan parsing bugs found by
Sönke Huster by fuzzing.

2 years agonet: phy: micrel: Fixes FIELD_GET assertion
Divya Koppera [Tue, 11 Oct 2022 09:54:37 +0000 (15:24 +0530)]
net: phy: micrel: Fixes FIELD_GET assertion

FIELD_GET() must only be used with a mask that is a compile-time
constant. Mark the functions as __always_inline to avoid the problem.

Fixes: 21b688dabecb6a ("net: phy: micrel: Cable Diag feature for lan8814 phy")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Divya Koppera <Divya.Koppera@microchip.com>
Link: https://lore.kernel.org/r/20221011095437.12580-1-Divya.Koppera@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoopenvswitch: add nf_ct_is_confirmed check before assigning the helper
Xin Long [Thu, 6 Oct 2022 19:45:02 +0000 (15:45 -0400)]
openvswitch: add nf_ct_is_confirmed check before assigning the helper

A WARN_ON call trace would be triggered when 'ct(commit, alg=helper)'
applies on a confirmed connection:

  WARNING: CPU: 0 PID: 1251 at net/netfilter/nf_conntrack_extend.c:98
  RIP: 0010:nf_ct_ext_add+0x12d/0x150 [nf_conntrack]
  Call Trace:
   <TASK>
   nf_ct_helper_ext_add+0x12/0x60 [nf_conntrack]
   __nf_ct_try_assign_helper+0xc4/0x160 [nf_conntrack]
   __ovs_ct_lookup+0x72e/0x780 [openvswitch]
   ovs_ct_execute+0x1d8/0x920 [openvswitch]
   do_execute_actions+0x4e6/0xb60 [openvswitch]
   ovs_execute_actions+0x60/0x140 [openvswitch]
   ovs_packet_cmd_execute+0x2ad/0x310 [openvswitch]
   genl_family_rcv_msg_doit.isra.15+0x113/0x150
   genl_rcv_msg+0xef/0x1f0

which can be reproduced with these OVS flows:

  table=0, in_port=veth1,tcp,tcp_dst=2121,ct_state=-trk
  actions=ct(commit, table=1)
  table=1, in_port=veth1,tcp,tcp_dst=2121,ct_state=+trk+new
  actions=ct(commit, alg=ftp),normal

The issue was introduced by commit 248d45f1e193 ("openvswitch: Allow
attaching helper in later commit") where it somehow removed the check
of nf_ct_is_confirmed before asigning the helper. This patch is to fix
it by bringing it back.

Fixes: 248d45f1e193 ("openvswitch: Allow attaching helper in later commit")
Reported-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Tested-by: Aaron Conole <aconole@redhat.com>
Link: https://lore.kernel.org/r/c5c9092a22a2194650222bffaf786902613deb16.1665085502.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'tcp-udp-fix-memory-leaks-and-data-races-around-ipv6_addrform'
Jakub Kicinski [Thu, 13 Oct 2022 00:50:40 +0000 (17:50 -0700)]
Merge branch 'tcp-udp-fix-memory-leaks-and-data-races-around-ipv6_addrform'

Kuniyuki Iwashima says:

====================
tcp/udp: Fix memory leaks and data races around IPV6_ADDRFORM.

This series fixes some memory leaks and data races caused in the
same scenario where one thread converts an IPv6 socket into IPv4
with IPV6_ADDRFORM and another accesses the socket concurrently.

  v4: https://lore.kernel.org/netdev/20221004171802.40968-1-kuniyu@amazon.com/
  v3 (Resend): https://lore.kernel.org/netdev/20221003154425.49458-1-kuniyu@amazon.com/
  v3: https://lore.kernel.org/netdev/20220929012542.55424-1-kuniyu@amazon.com/
  v2: https://lore.kernel.org/netdev/20220928002741.64237-1-kuniyu@amazon.com/
  v1: https://lore.kernel.org/netdev/20220927161209.32939-1-kuniyu@amazon.com/
====================

Link: https://lore.kernel.org/r/20221006185349.74777-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agotcp: Fix data races around icsk->icsk_af_ops.
Kuniyuki Iwashima [Thu, 6 Oct 2022 18:53:49 +0000 (11:53 -0700)]
tcp: Fix data races around icsk->icsk_af_ops.

setsockopt(IPV6_ADDRFORM) and tcp_v6_connect() change icsk->icsk_af_ops
under lock_sock(), but tcp_(get|set)sockopt() read it locklessly.  To
avoid load/store tearing, we need to add READ_ONCE() and WRITE_ONCE()
for the reads and writes.

Thanks to Eric Dumazet for providing the syzbot report:

BUG: KCSAN: data-race in tcp_setsockopt / tcp_v6_connect

write to 0xffff88813c624518 of 8 bytes by task 23936 on cpu 0:
tcp_v6_connect+0x5b3/0xce0 net/ipv6/tcp_ipv6.c:240
__inet_stream_connect+0x159/0x6d0 net/ipv4/af_inet.c:660
inet_stream_connect+0x44/0x70 net/ipv4/af_inet.c:724
__sys_connect_file net/socket.c:1976 [inline]
__sys_connect+0x197/0x1b0 net/socket.c:1993
__do_sys_connect net/socket.c:2003 [inline]
__se_sys_connect net/socket.c:2000 [inline]
__x64_sys_connect+0x3d/0x50 net/socket.c:2000
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813c624518 of 8 bytes by task 23937 on cpu 1:
tcp_setsockopt+0x147/0x1c80 net/ipv4/tcp.c:3789
sock_common_setsockopt+0x5d/0x70 net/core/sock.c:3585
__sys_setsockopt+0x212/0x2b0 net/socket.c:2252
__do_sys_setsockopt net/socket.c:2263 [inline]
__se_sys_setsockopt net/socket.c:2260 [inline]
__x64_sys_setsockopt+0x62/0x70 net/socket.c:2260
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0xffffffff8539af68 -> 0xffffffff8539aff8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 23937 Comm: syz-executor.5 Not tainted
6.0.0-rc4-syzkaller-00331-g4ed9c1e971b1-dirty #0

Hardware name: Google Google Compute Engine/Google Compute Engine,
BIOS Google 08/26/2022

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot <syzkaller@googlegroups.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoipv6: Fix data races around sk->sk_prot.
Kuniyuki Iwashima [Thu, 6 Oct 2022 18:53:48 +0000 (11:53 -0700)]
ipv6: Fix data races around sk->sk_prot.

Commit 086d49058cd8 ("ipv6: annotate some data-races around sk->sk_prot")
fixed some data-races around sk->sk_prot but it was not enough.

Some functions in inet6_(stream|dgram)_ops still access sk->sk_prot
without lock_sock() or rtnl_lock(), so they need READ_ONCE() to avoid
load tearing.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agotcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().
Kuniyuki Iwashima [Thu, 6 Oct 2022 18:53:47 +0000 (11:53 -0700)]
tcp/udp: Call inet6_destroy_sock() in IPv6 sk->sk_destruct().

Originally, inet6_sk(sk)->XXX were changed under lock_sock(), so we were
able to clean them up by calling inet6_destroy_sock() during the IPv6 ->
IPv4 conversion by IPV6_ADDRFORM.  However, commit 03485f2adcde ("udpv6:
Add lockless sendmsg() support") added a lockless memory allocation path,
which could cause a memory leak:

setsockopt(IPV6_ADDRFORM)                 sendmsg()
+-----------------------+                 +-------+
- do_ipv6_setsockopt(sk, ...)             - udpv6_sendmsg(sk, ...)
  - sockopt_lock_sock(sk)                   ^._ called via udpv6_prot
    - lock_sock(sk)                             before WRITE_ONCE()
  - WRITE_ONCE(sk->sk_prot, &tcp_prot)
  - inet6_destroy_sock()                    - if (!corkreq)
  - sockopt_release_sock(sk)                  - ip6_make_skb(sk, ...)
    - release_sock(sk)                          ^._ lockless fast path for
                                                    the non-corking case

                                                - __ip6_append_data(sk, ...)
                                                  - ipv6_local_rxpmtu(sk, ...)
                                                    - xchg(&np->rxpmtu, skb)
                                                      ^._ rxpmtu is never freed.

                                                - goto out_no_dst;

                                            - lock_sock(sk)

For now, rxpmtu is only the case, but not to miss the future change
and a similar bug fixed in commit e27326009a3d ("net: ping6: Fix
memleak in ipv6_renew_options()."), let's set a new function to IPv6
sk->sk_destruct() and call inet6_cleanup_sock() there.  Since the
conversion does not change sk->sk_destruct(), we can guarantee that
we can clean up IPv6 resources finally.

We can now remove all inet6_destroy_sock() calls from IPv6 protocol
specific ->destroy() functions, but such changes are invasive to
backport.  So they can be posted as a follow-up later for net-next.

Fixes: 03485f2adcde ("udpv6: Add lockless sendmsg() support")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoudp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).
Kuniyuki Iwashima [Thu, 6 Oct 2022 18:53:46 +0000 (11:53 -0700)]
udp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).

Commit 4b340ae20d0e ("IPv6: Complete IPV6_DONTFRAG support") forgot
to add a change to free inet6_sk(sk)->rxpmtu while converting an IPv6
socket into IPv4 with IPV6_ADDRFORM.  After conversion, sk_prot is
changed to udp_prot and ->destroy() never cleans it up, resulting in
a memory leak.

This is due to the discrepancy between inet6_destroy_sock() and
IPV6_ADDRFORM, so let's call inet6_destroy_sock() from IPV6_ADDRFORM
to remove the difference.

However, this is not enough for now because rxpmtu can be changed
without lock_sock() after commit 03485f2adcde ("udpv6: Add lockless
sendmsg() support").  We will fix this case in the following patch.

Note we will rename inet6_destroy_sock() to inet6_cleanup_sock() and
remove unnecessary inet6_destroy_sock() calls in sk_prot->destroy()
in the future.

Fixes: 4b340ae20d0e ("IPv6: Complete IPV6_DONTFRAG support")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agotcp/udp: Fix memory leak in ipv6_renew_options().
Kuniyuki Iwashima [Thu, 6 Oct 2022 18:53:45 +0000 (11:53 -0700)]
tcp/udp: Fix memory leak in ipv6_renew_options().

syzbot reported a memory leak [0] related to IPV6_ADDRFORM.

The scenario is that while one thread is converting an IPv6 socket into
IPv4 with IPV6_ADDRFORM, another thread calls do_ipv6_setsockopt() and
allocates memory to inet6_sk(sk)->XXX after conversion.

Then, the converted sk with (tcp|udp)_prot never frees the IPv6 resources,
which inet6_destroy_sock() should have cleaned up.

setsockopt(IPV6_ADDRFORM)                 setsockopt(IPV6_DSTOPTS)
+-----------------------+                 +----------------------+
- do_ipv6_setsockopt(sk, ...)
  - sockopt_lock_sock(sk)                 - do_ipv6_setsockopt(sk, ...)
    - lock_sock(sk)                         ^._ called via tcpv6_prot
  - WRITE_ONCE(sk->sk_prot, &tcp_prot)          before WRITE_ONCE()
  - xchg(&np->opt, NULL)
  - txopt_put(opt)
  - sockopt_release_sock(sk)
    - release_sock(sk)                      - sockopt_lock_sock(sk)
                                              - lock_sock(sk)
                                            - ipv6_set_opt_hdr(sk, ...)
                                              - ipv6_update_options(sk, opt)
                                                - xchg(&inet6_sk(sk)->opt, opt)
                                                  ^._ opt is never freed.

                                            - sockopt_release_sock(sk)
                                              - release_sock(sk)

Since IPV6_DSTOPTS allocates options under lock_sock(), we can avoid this
memory leak by testing whether sk_family is changed by IPV6_ADDRFORM after
acquiring the lock.

This issue exists from the initial commit between IPV6_ADDRFORM and
IPV6_PKTOPTIONS.

[0]:
BUG: memory leak
unreferenced object 0xffff888009ab9f80 (size 96):
  comm "syz-executor583", pid 328, jiffies 4294916198 (age 13.034s)
  hex dump (first 32 bytes):
    01 00 00 00 48 00 00 00 08 00 00 00 00 00 00 00  ....H...........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000002ee98ae1>] kmalloc include/linux/slab.h:605 [inline]
    [<000000002ee98ae1>] sock_kmalloc+0xb3/0x100 net/core/sock.c:2566
    [<0000000065d7b698>] ipv6_renew_options+0x21e/0x10b0 net/ipv6/exthdrs.c:1318
    [<00000000a8c756d7>] ipv6_set_opt_hdr net/ipv6/ipv6_sockglue.c:354 [inline]
    [<00000000a8c756d7>] do_ipv6_setsockopt.constprop.0+0x28b7/0x4350 net/ipv6/ipv6_sockglue.c:668
    [<000000002854d204>] ipv6_setsockopt+0xdf/0x190 net/ipv6/ipv6_sockglue.c:1021
    [<00000000e69fdcf8>] tcp_setsockopt+0x13b/0x2620 net/ipv4/tcp.c:3789
    [<0000000090da4b9b>] __sys_setsockopt+0x239/0x620 net/socket.c:2252
    [<00000000b10d192f>] __do_sys_setsockopt net/socket.c:2263 [inline]
    [<00000000b10d192f>] __se_sys_setsockopt net/socket.c:2260 [inline]
    [<00000000b10d192f>] __x64_sys_setsockopt+0xbe/0x160 net/socket.c:2260
    [<000000000a80d7aa>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<000000000a80d7aa>] do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80
    [<000000004562b5c6>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoio_uring/rw: ensure kiocb_end_write() is always called
Jens Axboe [Tue, 11 Oct 2022 15:06:23 +0000 (09:06 -0600)]
io_uring/rw: ensure kiocb_end_write() is always called

A previous commit moved the notifications and end-write handling, but
it is now missing a few spots where we also want to call both of those.
Without that, we can potentially be missing file notifications, and
more importantly, have an imbalance in the super_block writers sem
accounting.

Fixes: b000145e9907 ("io_uring/rw: defer fsnotify calls to task context")
Reported-by: Dave Chinner <david@fromorbit.com>
Link: https://lore.kernel.org/all/20221010050319.GC2703033@dread.disaster.area/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: fix fdinfo sqe offsets calculation
Pavel Begunkov [Tue, 11 Oct 2022 00:59:57 +0000 (01:59 +0100)]
io_uring: fix fdinfo sqe offsets calculation

Only with the big sqe feature they take 128 bytes per entry, but we
unconditionally advance by 128B. Fix it by using sq_shift.

Fixes: 3b8fdd1dc35e3 ("io_uring/fdinfo: fix sqe dumping for IORING_SETUP_SQE128")
Reported-and-tested-by: syzbot+e5198737e8a2d23d958c@syzkaller.appspotmail.com
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8b41287cb75d5efb8fcb5cccde845ddbbadd8372.1665449983.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: local variable rw shadows outer variable in io_write
Stefan Roesch [Mon, 10 Oct 2022 23:43:30 +0000 (16:43 -0700)]
io_uring: local variable rw shadows outer variable in io_write

This fixes the shadowing of the outer variable rw in the function
io_write(). No issue is caused by this, but let's silence the shadowing
warning anyway.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Stefan Roesch <shr@devkernel.io>
Link: https://lore.kernel.org/r/20221010234330.244244-1-shr@devkernel.io
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring/opdef: remove 'audit_skip' from SENDMSG_ZC
Jens Axboe [Fri, 7 Oct 2022 18:26:02 +0000 (12:26 -0600)]
io_uring/opdef: remove 'audit_skip' from SENDMSG_ZC

The msg variants of sending aren't audited separately, so we should not
be setting audit_skip for the zerocopy sendmsg variant either.

Fixes: 493108d95f14 ("io_uring/net: zerocopy sendmsg")
Reported-by: Paul Moore <paul@paul-moore.com>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: optimise locking for local tw with submit_wait
Pavel Begunkov [Thu, 6 Oct 2022 20:42:33 +0000 (21:42 +0100)]
io_uring: optimise locking for local tw with submit_wait

Running local task_work requires taking uring_lock, for submit + wait we
can try to run them right after submit while we still hold the lock and
save one lock/unlokc pair. The optimisation was implemented in the first
local tw patches but got dropped for simplicity.

Suggested-by: Dylan Yudaken <dylany@fb.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/281fc79d98b5d91fe4778c5137a17a2ab4693e5c.1665088876.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: remove redundant memory barrier in io_req_local_work_add
Pavel Begunkov [Thu, 6 Oct 2022 01:06:10 +0000 (02:06 +0100)]
io_uring: remove redundant memory barrier in io_req_local_work_add

io_cqring_wake() needs a barrier for the waitqueue_active() check.
However, in the case of io_req_local_work_add(), we call llist_add()
first, which implies an atomic. Hence we can replace smb_mb() with
smp_mb__after_atomic().

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/43983bc8bc507172adda7a0f00cab1aff09fd238.1665018309.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring/net: handle -EINPROGRESS correct for IORING_OP_CONNECT
Jens Axboe [Wed, 5 Oct 2022 02:29:48 +0000 (20:29 -0600)]
io_uring/net: handle -EINPROGRESS correct for IORING_OP_CONNECT

We treat EINPROGRESS like EAGAIN, but if we're retrying post getting
EINPROGRESS, then we just need to check the socket for errors and
terminate the request.

This was exposed on a bluetooth connection request which ends up
taking a while and hitting EINPROGRESS, and yields a CQE result of
-EBADFD because we're retrying a connect on a socket that is now
connected.

Cc: stable@vger.kernel.org
Fixes: 87f80d623c6c ("io_uring: handle connect -EINPROGRESS like -EAGAIN")
Link: https://github.com/axboe/liburing/issues/671
Reported-by: Aidan Sun <aidansun05@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: remove notif leftovers
Pavel Begunkov [Tue, 4 Oct 2022 02:19:25 +0000 (03:19 +0100)]
io_uring: remove notif leftovers

Notifications were killed but there is a couple of fields and struct
declarations left, remove them.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8df8877d677be5a2b43afd936d600e60105ea960.1664849941.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring: correct pinned_vm accounting
Pavel Begunkov [Tue, 4 Oct 2022 02:19:08 +0000 (03:19 +0100)]
io_uring: correct pinned_vm accounting

->mm_account should be released only after we free all registered
buffers, otherwise __io_sqe_buffers_unregister() will see a NULL
->mm_account and skip locked_vm accounting.

Cc: <Stable@vger.kernel.org>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/6d798f65ed4ab8db3664c4d3397d4af16ca98846.1664849932.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoio_uring/af_unix: defer registered files gc to io_uring release
Pavel Begunkov [Mon, 3 Oct 2022 12:59:47 +0000 (13:59 +0100)]
io_uring/af_unix: defer registered files gc to io_uring release

Instead of putting io_uring's registered files in unix_gc() we want it
to be done by io_uring itself. The trick here is to consider io_uring
registered files for cycle detection but not actually putting them down.
Because io_uring can't register other ring instances, this will remove
all refs to the ring file triggering the ->release path and clean up
with io_ring_ctx_free().

Cc: stable@vger.kernel.org
Fixes: 6b06314c47e1 ("io_uring: add file set registration")
Reported-and-tested-by: David Bouman <dbouman03@gmail.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
[axboe: add kerneldoc comment to skb, fold in skb leak fix]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 years agoMerge tag 'linux-kselftest-kunit-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Wed, 12 Oct 2022 22:01:58 +0000 (15:01 -0700)]
Merge tag 'linux-kselftest-kunit-6.1-rc1-2' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull more KUnit updates from Shuah Khan:
 "Features and fixes:

   - simplify resource use

   - make kunit_malloc() and kunit_free() allocations and frees
     consistent. kunit_free() frees only the memory allocated by
     kunit_malloc()

   - stop downloading risc-v opensbi binaries using wget

   - other fixes and improvements to tool and KUnit framework"

* tag 'linux-kselftest-kunit-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  Documentation: kunit: Update description of --alltests option
  kunit: declare kunit_assert structs as const
  kunit: rename base KUNIT_ASSERTION macro to _KUNIT_FAILED
  kunit: remove format func from struct kunit_assert, get it to 0 bytes
  kunit: tool: Don't download risc-v opensbi firmware with wget
  kunit: make kunit_kfree(NULL) a no-op to match kfree()
  kunit: make kunit_kfree() not segfault on invalid inputs
  kunit: make kunit_kfree() only work on pointers from kunit_malloc() and friends
  kunit: drop test pointer in string_stream_fragment
  kunit: string-stream: Simplify resource use

2 years agoMerge tag 'linux-kselftest-next-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Wed, 12 Oct 2022 21:59:13 +0000 (14:59 -0700)]
Merge tag 'linux-kselftest-next-6.1-rc1-2' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull more Kselftest updates from Shuah Khan:
 "This consists of fixes and improvements to memory-hotplug test and a
  minor spelling fix to ftrace test"

* tag 'linux-kselftest-next-6.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  docs: notifier-error-inject: Correct test's name
  selftests/memory-hotplug: Adjust log info for maintainability
  selftests/memory-hotplug: Restore memory before exit
  selftests/memory-hotplug: Add checking after online or offline
  selftests/ftrace: func_event_triggers: fix typo in user message

2 years agoMerge tag 'vfio-v6.1-rc1' of https://github.com/awilliam/linux-vfio
Linus Torvalds [Wed, 12 Oct 2022 21:46:48 +0000 (14:46 -0700)]
Merge tag 'vfio-v6.1-rc1' of https://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - Prune private items from vfio_pci_core.h to a new internal header,
   fix missed function rename, and refactor vfio-pci interrupt defines
   (Jason Gunthorpe)

 - Create consistent naming and handling of ioctls with a function per
   ioctl for vfio-pci and vfio group handling, use proper type args
   where available (Jason Gunthorpe)

 - Implement a set of low power device feature ioctls allowing userspace
   to make use of power states such as D3cold where supported (Abhishek
   Sahu)

 - Remove device counter on vfio groups, which had restricted the page
   pinning interface to singleton groups to account for limitations in
   the type1 IOMMU backend. Document usage as limited to emulated IOMMU
   devices, ie. traditional mdev devices where this restriction is
   consistent (Jason Gunthorpe)

 - Correct function prefix in hisi_acc driver incurred during previous
   refactoring (Shameer Kolothum)

 - Correct typo and remove redundant warning triggers in vfio-fsl driver
   (Christophe JAILLET)

 - Introduce device level DMA dirty tracking uAPI and implementation in
   the mlx5 variant driver (Yishai Hadas & Joao Martins)

 - Move much of the vfio_device life cycle management into vfio core,
   simplifying and avoiding duplication across drivers. This also
   facilitates adding a struct device to vfio_device which begins the
   introduction of device rather than group level user support and fills
   a gap allowing userspace identify devices as vfio capable without
   implicit knowledge of the driver (Kevin Tian & Yi Liu)

 - Split vfio container handling to a separate file, creating a more
   well defined API between the core and container code, masking IOMMU
   backend implementation from the core, allowing for an easier future
   transition to an iommufd based implementation of the same (Jason
   Gunthorpe)

 - Attempt to resolve race accessing the iommu_group for a device
   between vfio releasing DMA ownership and removal of the device from
   the IOMMU driver. Follow-up with support to allow vfio_group to exist
   with NULL iommu_group pointer to support existing userspace use cases
   of holding the group file open (Jason Gunthorpe)

 - Fix error code and hi/lo register manipulation issues in the hisi_acc
   variant driver, along with various code cleanups (Longfang Liu)

 - Fix a prior regression in GVT-g group teardown, resulting in
   unreleased resources (Jason Gunthorpe)

 - A significant cleanup and simplification of the mdev interface,
   consolidating much of the open coded per driver sysfs interface
   support into the mdev core (Christoph Hellwig)

 - Simplification of tracking and locking around vfio_groups that fall
   out from previous refactoring (Jason Gunthorpe)

 - Replace trivial open coded f_ops tests with new helper (Alex
   Williamson)

* tag 'vfio-v6.1-rc1' of https://github.com/awilliam/linux-vfio: (77 commits)
  vfio: More vfio_file_is_group() use cases
  vfio: Make the group FD disassociate from the iommu_group
  vfio: Hold a reference to the iommu_group in kvm for SPAPR
  vfio: Add vfio_file_is_group()
  vfio: Change vfio_group->group_rwsem to a mutex
  vfio: Remove the vfio_group->users and users_comp
  vfio/mdev: add mdev available instance checking to the core
  vfio/mdev: consolidate all the description sysfs into the core code
  vfio/mdev: consolidate all the available_instance sysfs into the core code
  vfio/mdev: consolidate all the name sysfs into the core code
  vfio/mdev: consolidate all the device_api sysfs into the core code
  vfio/mdev: remove mtype_get_parent_dev
  vfio/mdev: remove mdev_parent_dev
  vfio/mdev: unexport mdev_bus_type
  vfio/mdev: remove mdev_from_dev
  vfio/mdev: simplify mdev_type handling
  vfio/mdev: embedd struct mdev_parent in the parent data structure
  vfio/mdev: make mdev.h standalone includable
  drm/i915/gvt: simplify vgpu configuration management
  drm/i915/gvt: fix a memory leak in intel_gvt_init_vgpu_types
  ...

2 years agoMerge tag 'for-linus-6.1-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 12 Oct 2022 21:39:38 +0000 (14:39 -0700)]
Merge tag 'for-linus-6.1-rc1-tag' of git://git./linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - Some minor typo fixes

 - A fix of the Xen pcifront driver for supporting the device model to
   run in a Linux stub domain

 - A cleanup of the pcifront driver

 - A series to enable grant-based virtio with Xen on x86

 - A cleanup of Xen PV guests to distinguish between safe and faulting
   MSR accesses

 - Two fixes of the Xen gntdev driver

 - Two fixes of the new xen grant DMA driver

* tag 'for-linus-6.1-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen: Kconfig: Fix spelling mistake "Maxmium" -> "Maximum"
  xen/pv: support selecting safe/unsafe msr accesses
  xen/pv: refactor msr access functions to support safe and unsafe accesses
  xen/pv: fix vendor checks for pmu emulation
  xen/pv: add fault recovery control to pmu msr accesses
  xen/virtio: enable grant based virtio on x86
  xen/virtio: use dom0 as default backend for CONFIG_XEN_VIRTIO_FORCE_GRANT
  xen/virtio: restructure xen grant dma setup
  xen/pcifront: move xenstore config scanning into sub-function
  xen/gntdev: Accommodate VMA splitting
  xen/gntdev: Prevent leaking grants
  xen/virtio: Fix potential deadlock when accessing xen_grant_dma_devices
  xen/virtio: Fix n_pages calculation in xen_grant_dma_map(unmap)_page()
  xen/xenbus: Fix spelling mistake "hardward" -> "hardware"
  xen-pcifront: Handle missed Connected state

2 years agoMerge tag 'mm-hotfixes-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Wed, 12 Oct 2022 18:16:58 +0000 (11:16 -0700)]
Merge tag 'mm-hotfixes-stable-2022-10-11' of git://git./linux/kernel/git/akpm/mm

Pull misc hotfixes from Andrew Morton:
 "Five hotfixes - three for nilfs2, two for MM. For are cc:stable, one
  is not"

* tag 'mm-hotfixes-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  nilfs2: fix leak of nilfs_root in case of writer thread creation failure
  nilfs2: fix NULL pointer dereference at nilfs_bmap_lookup_at_level()
  nilfs2: fix use-after-free bug of struct nilfs_root
  mm/damon/core: initialize damon_target->list in damon_new_target()
  mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page

2 years agoMerge tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 12 Oct 2022 18:00:22 +0000 (11:00 -0700)]
Merge tag 'mm-nonmm-stable-2022-10-11' of git://git./linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - hfs and hfsplus kmap API modernization (Fabio Francesco)

 - make crash-kexec work properly when invoked from an NMI-time panic
   (Valentin Schneider)

 - ntfs bugfixes (Hawkins Jiawei)

 - improve IPC msg scalability by replacing atomic_t's with percpu
   counters (Jiebin Sun)

 - nilfs2 cleanups (Minghao Chi)

 - lots of other single patches all over the tree!

* tag 'mm-nonmm-stable-2022-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (71 commits)
  include/linux/entry-common.h: remove has_signal comment of arch_do_signal_or_restart() prototype
  proc: test how it holds up with mapping'less process
  mailmap: update Frank Rowand email address
  ia64: mca: use strscpy() is more robust and safer
  init/Kconfig: fix unmet direct dependencies
  ia64: update config files
  nilfs2: replace WARN_ONs by nilfs_error for checkpoint acquisition failure
  fork: remove duplicate included header files
  init/main.c: remove unnecessary (void*) conversions
  proc: mark more files as permanent
  nilfs2: remove the unneeded result variable
  nilfs2: delete unnecessary checks before brelse()
  checkpatch: warn for non-standard fixes tag style
  usr/gen_init_cpio.c: remove unnecessary -1 values from int file
  ipc/msg: mitigate the lock contention with percpu counter
  percpu: add percpu_counter_add_local and percpu_counter_sub_local
  fs/ocfs2: fix repeated words in comments
  relay: use kvcalloc to alloc page array in relay_alloc_page_array
  proc: make config PROC_CHILDREN depend on PROC_FS
  fs: uninline inode_maybe_inc_iversion()
  ...

2 years agotracing: Fix reading strings from synthetic events
Steven Rostedt (Google) [Wed, 12 Oct 2022 10:40:58 +0000 (06:40 -0400)]
tracing: Fix reading strings from synthetic events

The follow commands caused a crash:

  # cd /sys/kernel/tracing
  # echo 's:open char file[]' > dynamic_events
  # echo 'hist:keys=common_pid:file=filename:onchange($file).trace(open,$file)' > events/syscalls/sys_enter_openat/trigger'
  # echo 1 > events/synthetic/open/enable

BOOM!

The problem is that the synthetic event field "char file[]" will read
the value given to it as a string without any memory checks to make sure
the address is valid. The above example will pass in the user space
address and the sythetic event code will happily call strlen() on it
and then strscpy() where either one will cause an oops when accessing
user space addresses.

Use the helper functions from trace_kprobe and trace_eprobe that can
read strings safely (and actually succeed when the address is from user
space and the memory is mapped in).

Now the above can show:

     packagekitd-1721    [000] ...2.   104.597170: open: file=/usr/lib/rpm/fileattrs/cmake.attr
    in:imjournal-978     [006] ...2.   104.599642: open: file=/var/lib/rsyslog/imjournal.state.tmp
     packagekitd-1721    [000] ...2.   104.626308: open: file=/usr/lib/rpm/fileattrs/debuginfo.attr

Link: https://lkml.kernel.org/r/20221012104534.826549315@goodmis.org
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Fixes: bd82631d7ccdc ("tracing: Add support for dynamic strings to synthetic events")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agotracing: Add "(fault)" name injection to kernel probes
Steven Rostedt (Google) [Wed, 12 Oct 2022 10:40:57 +0000 (06:40 -0400)]
tracing: Add "(fault)" name injection to kernel probes

Have the specific functions for kernel probes that read strings to inject
the "(fault)" name directly. trace_probes.c does this too (for uprobes)
but as the code to read strings are going to be used by synthetic events
(and perhaps other utilities), it simplifies the code by making sure those
other uses do not need to implement the "(fault)" name injection as well.

Link: https://lkml.kernel.org/r/20221012104534.644803645@goodmis.org
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Fixes: bd82631d7ccdc ("tracing: Add support for dynamic strings to synthetic events")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agotracing: Move duplicate code of trace_kprobe/eprobe.c into header
Steven Rostedt (Google) [Wed, 12 Oct 2022 10:40:56 +0000 (06:40 -0400)]
tracing: Move duplicate code of trace_kprobe/eprobe.c into header

The functions:

  fetch_store_strlen_user()
  fetch_store_strlen()
  fetch_store_string_user()
  fetch_store_string()

are identical in both trace_kprobe.c and trace_eprobe.c. Move them into
a new header file trace_probe_kernel.h to share it. This code will later
be used by the synthetic events as well.

Marked for stable as a fix for a crash in synthetic events requires it.

Link: https://lkml.kernel.org/r/20221012104534.467668078@goodmis.org
Cc: stable@vger.kernel.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Tom Zanussi <zanussi@kernel.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Fixes: bd82631d7ccdc ("tracing: Add support for dynamic strings to synthetic events")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agoMerge tag 'loongarch-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai...
Linus Torvalds [Wed, 12 Oct 2022 17:35:20 +0000 (10:35 -0700)]
Merge tag 'loongarch-6.1' of git://git./linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch updates from Huacai Chen:

 - Use EXPLICIT_RELOCS (ABIv2.0)

 - Use generic BUG() handler

 - Refactor TLB/Cache operations

 - Add qspinlock support

 - Add perf events support

 - Add kexec/kdump support

 - Add BPF JIT support

 - Add ACPI-based laptop driver

 - Update the default config file

* tag 'loongarch-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (25 commits)
  LoongArch: Update Loongson-3 default config file
  LoongArch: Add ACPI-based generic laptop driver
  LoongArch: Add BPF JIT support
  LoongArch: Add some instruction opcodes and formats
  LoongArch: Move {signed,unsigned}_imm_check() to inst.h
  LoongArch: Add kdump support
  LoongArch: Add kexec support
  LoongArch: Use generic BUG() handler
  LoongArch: Add SysRq-x (TLB Dump) support
  LoongArch: Add perf events support
  LoongArch: Add qspinlock support
  LoongArch: Use TLB for ioremap()
  LoongArch: Support access filter to /dev/mem interface
  LoongArch: Refactor cache probe and flush methods
  LoongArch: mm: Refactor TLB exception handlers
  LoongArch: Support R_LARCH_GOT_PC_{LO12,HI20} in modules
  LoongArch: Support PC-relative relocations in modules
  LoongArch: Define ELF relocation types added in ABIv2.0
  LoongArch: Adjust symbol addressing for AS_HAS_EXPLICIT_RELOCS
  LoongArch: Add Kconfig option AS_HAS_EXPLICIT_RELOCS
  ...

2 years agoMerge tag 'irq-core-2022-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 12 Oct 2022 17:23:24 +0000 (10:23 -0700)]
Merge tag 'irq-core-2022-10-12' of git://git./linux/kernel/git/tip/tip

Pull interrupt updates from Thomas Gleixner:
 "Core code:

   - Provide a generic wrapper which can be utilized in drivers to
     handle the problem of force threaded demultiplex interrupts on RT
     enabled kernels. This avoids conditionals and horrible quirks in
     drivers all over the place

   - Fix up affected pinctrl and GPIO drivers to make them cleanly RT
     safe

  Interrupt drivers:

   - A new driver for the FSL MU platform specific MSI implementation

   - Make irqchip_init() available for pure ACPI based systems

   - Provide a functional DT binding for the Realtek RTL interrupt chip

   - The usual DT updates and small code improvements all over the
     place"

* tag 'irq-core-2022-10-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
  irqchip: IMX_MU_MSI should depend on ARCH_MXC
  irqchip/imx-mu-msi: Fix wrong register offset for 8ulp
  irqchip/ls-extirq: Fix invalid wait context by avoiding to use regmap
  dt-bindings: irqchip: Describe the IMX MU block as a MSI controller
  irqchip: Add IMX MU MSI controller driver
  dt-bindings: irqchip: renesas,irqc: Add r8a779g0 support
  irqchip/gic-v3: Fix typo in comment
  dt-bindings: interrupt-controller: ti,sci-intr: Fix missing reg property in the binding
  dt-bindings: irqchip: ti,sci-inta: Fix warning for missing #interrupt-cells
  irqchip: Allow extra fields to be passed to IRQCHIP_PLATFORM_DRIVER_END
  platform-msi: Export symbol platform_msi_create_irq_domain()
  irqchip/realtek-rtl: use parent interrupts
  dt-bindings: interrupt-controller: realtek,rtl-intc: require parents
  irqchip/realtek-rtl: use irq_domain_add_linear()
  irqchip: Make irqchip_init() usable on pure ACPI systems
  bcma: gpio: Use generic_handle_irq_safe()
  gpio: mlxbf2: Use generic_handle_irq_safe()
  platform/x86: intel_int0002_vgpio: Use generic_handle_irq_safe()
  ssb: gpio: Use generic_handle_irq_safe()
  pinctrl: amd: Use generic_handle_irq_safe()
  ...

2 years agodrm/amd/display: Add HUBP surface flip interrupt handler
Aurabindo Pillai [Thu, 6 Oct 2022 21:17:40 +0000 (17:17 -0400)]
drm/amd/display: Add HUBP surface flip interrupt handler

Add the hubp surface flip handler. This fixes some flip timeout issues.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
2 years agodt-bindings: mfd: mt6370: fix the interrupt order of the charger in the example
ChiaEn Wu [Wed, 12 Oct 2022 07:08:14 +0000 (15:08 +0800)]
dt-bindings: mfd: mt6370: fix the interrupt order of the charger in the example

Fix the interrupt order of the charger in the binding example.

Fixes: 76f52f815f1a ("dt-bindings: mfd: Add MediaTek MT6370")
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/fcf4e7e7594070a8698dc0d4b96e031bcaa9b3a3.1665585952.git.chiaen_wu@richtek.com
Signed-off-by: Rob Herring <robh@kernel.org>
2 years agodt-bindings: leds: mt6370: Fix MT6370 LED indicator DT warning
ChiaEn Wu [Thu, 6 Oct 2022 03:16:13 +0000 (11:16 +0800)]
dt-bindings: leds: mt6370: Fix MT6370 LED indicator DT warning

Add '$ref' and 'unevaluatedProperties: false' in 'multi-led', and remove
unused 'allOf' property.

Fixes: 440c57dabb45 ("dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED indicator")
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/435f6888ebc20c5abae63eb9cb3a055b60db2ed1.1665050503.git.chiaen_wu@richtek.com
Signed-off-by: Rob Herring <robh@kernel.org>
2 years agoMerge tag 'nvme-6.1-2022-10-12' of git://git.infradead.org/nvme into block-6.1
Jens Axboe [Wed, 12 Oct 2022 13:15:53 +0000 (07:15 -0600)]
Merge tag 'nvme-6.1-2022-10-12' of git://git.infradead.org/nvme into block-6.1

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.1

 - add NVME_QUIRK_BOGUS_NID for Lexar NM760 (Abhijit)
 - avoid the deepest sleep state on ZHITAI TiPro5000 SSDs (Xi Ruoyao)
 - fix possible hang caused during ctrl deletion (Sagi Grimberg)
 - fix possible hang in live ns resize with ANA access (Sagi Grimberg)"

* tag 'nvme-6.1-2022-10-12' of git://git.infradead.org/nvme:
  nvme-multipath: fix possible hang in live ns resize with ANA access
  nvme-pci: avoid the deepest sleep state on ZHITAI TiPro5000 SSDs
  nvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM760
  nvme-tcp: fix possible hang caused during ctrl deletion
  nvme-rdma: fix possible hang caused during ctrl deletion

2 years agoring-buffer: Fix kernel-doc
Jiapeng Chong [Sun, 9 Oct 2022 02:06:42 +0000 (10:06 +0800)]
ring-buffer: Fix kernel-doc

kernel/trace/ring_buffer.c:895: warning: expecting prototype for ring_buffer_nr_pages_dirty(). Prototype was for ring_buffer_nr_dirty_pages() instead.
kernel/trace/ring_buffer.c:5313: warning: expecting prototype for ring_buffer_reset_cpu(). Prototype was for ring_buffer_reset_online_cpus() instead.
kernel/trace/ring_buffer.c:5382: warning: expecting prototype for rind_buffer_empty(). Prototype was for ring_buffer_empty() instead.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2340
Link: https://lkml.kernel.org/r/20221009020642.12506-1-jiapeng.chong@linux.alibaba.com
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agomctp: prevent double key removal and unref
Jeremy Kerr [Wed, 12 Oct 2022 02:08:51 +0000 (10:08 +0800)]
mctp: prevent double key removal and unref

Currently, we have a bug where a simultaneous DROPTAG ioctl and socket
close may race, as we attempt to remove a key from lists twice, and
perform an unref for each removal operation. This may result in a uaf
when we attempt the second unref.

This change fixes the race by making __mctp_key_remove tolerant to being
called on a key that has already been removed from the socket/net lists,
and only performs the unref when we do the actual remove. We also need
to hold the list lock on the ioctl cleanup path.

This fix is based on a bug report and comprehensive analysis from
butt3rflyh4ck <butterflyhuangxx@gmail.com>, found via syzkaller.

Cc: stable@vger.kernel.org
Fixes: 63ed1aab3d40 ("mctp: Add SIOCMCTP{ALLOC,DROP}TAG ioctls for tag control")
Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
David S. Miller [Wed, 12 Oct 2022 12:29:07 +0000 (13:29 +0100)]
Merge branch 'master' of git://git./linux/kernel/git/netfilter/nf

Florian Westphal says:

====================
netfilter fixes for net

This series from Phil Sutter for the *net* tree fixes a problem with a change
from the 6.1 development phase: the change to nft_fib should have used
the more recent flowic_l3mdev field.  Pointed out by Guillaume Nault.
This also makes the older iptables module follow the same pattern.

Also add selftest case and avoid test failure in nft_fib.sh when the
host environment has set rp_filter=1.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests: netfilter: Fix nft_fib.sh for all.rp_filter=1
Phil Sutter [Wed, 5 Oct 2022 15:34:36 +0000 (17:34 +0200)]
selftests: netfilter: Fix nft_fib.sh for all.rp_filter=1

If net.ipv4.conf.all.rp_filter is set, it overrides the per-interface
setting and thus defeats the fix from bbe4c0896d250 ("selftests:
netfilter: disable rp_filter on router"). Unset it as well to cover that
case.

Fixes: bbe4c0896d250 ("selftests: netfilter: disable rp_filter on router")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agonetfilter: rpfilter/fib: Populate flowic_l3mdev field
Phil Sutter [Wed, 5 Oct 2022 16:07:05 +0000 (18:07 +0200)]
netfilter: rpfilter/fib: Populate flowic_l3mdev field

Use the introduced field for correct operation with VRF devices instead
of conditionally overwriting flowic_oif. This is a partial revert of
commit b575b24b8eee3 ("netfilter: Fix rpfilter dropping vrf packets by
mistake"), implementing a simpler solution.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agoselftests: netfilter: Test reverse path filtering
Phil Sutter [Wed, 5 Oct 2022 16:07:04 +0000 (18:07 +0200)]
selftests: netfilter: Test reverse path filtering

Test reverse path (filter) matches in iptables, ip6tables and nftables.
Both with a regular interface and a VRF.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
2 years agoftrace: Fix char print issue in print_ip_ins()
Zheng Yejian [Tue, 11 Oct 2022 12:03:52 +0000 (12:03 +0000)]
ftrace: Fix char print issue in print_ip_ins()

When ftrace bug happened, following log shows every hex data in
problematic ip address:
  actual:   ffffffe8:6b:ffffffd9:01:21

But so many 'f's seem a little confusing, and that is because format
'%x' being used to print signed chars in array 'ins'. As suggested
by Joe, change to use format "%*phC" to print array 'ins'.

After this patch, the log is like:
  actual:   e8:6b:d9:01:21

Link: https://lkml.kernel.org/r/20221011120352.1878494-1-zhengyejian1@huawei.com
Fixes: 6c14133d2d3f ("ftrace: Do not blindly read the ip address in ftrace_bug()")
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Zheng Yejian <zhengyejian1@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 years agonvme-multipath: fix possible hang in live ns resize with ANA access
Sagi Grimberg [Thu, 29 Sep 2022 07:36:47 +0000 (10:36 +0300)]
nvme-multipath: fix possible hang in live ns resize with ANA access

When we revalidate paths as part of ns size change (as of commit
e7d65803e2bb), it is possible that during the path revalidation, the
only paths that is IO capable (i.e. optimized/non-optimized) are the
ones that ns resize was not yet informed to the host, which will cause
inflight requests to be requeued (as we have available paths but none
are IO capable). These requests on the requeue list are waiting for
someone to resubmit them at some point.

The IO capable paths will eventually notify the ns resize change to the
host, but there is nothing that will kick the requeue list to resubmit
the queued requests.

Fix this by always kicking the requeue list, and if no IO capable path
exists, these requests will be queued again.

A typical log that indicates that IOs are requeued:
--
nvme nvme1: creating 4 I/O queues.
nvme nvme1: new ctrl: "testnqn1"
nvme nvme2: creating 4 I/O queues.
nvme nvme2: mapped 4/0/0 default/read/poll queues.
nvme nvme2: new ctrl: NQN "testnqn1", addr 127.0.0.1:8009
nvme nvme1: rescanning namespaces.
nvme1n1: detected capacity change from 2097152 to 4194304
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
block nvme1n1: no usable path - requeuing I/O
nvme nvme2: rescanning namespaces.
--

Reported-by: Yogev Cohen <yogev@lightbitslabs.com>
Fixes: e7d65803e2bb ("nvme-multipath: revalidate paths during rescan")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Cc: <stable@vger.kernel.org> # v5.15+
Signed-off-by: Christoph Hellwig <hch@lst.de>
2 years agonvme-pci: avoid the deepest sleep state on ZHITAI TiPro5000 SSDs
Xi Ruoyao [Wed, 28 Sep 2022 09:39:13 +0000 (17:39 +0800)]
nvme-pci: avoid the deepest sleep state on ZHITAI TiPro5000 SSDs

ZHITAI TiPro5000 SSDs has the same APST sleep problem as its cousin,
TiPro7000.  The quirk for TiPro7000 has been added in
commit 6b961bce50e4 ("nvme-pci: avoid the deepest sleep state on
ZHITAI TiPro7000 SSDs"), use the same quirk for TiPro5000.

The ASPT data from "nvme id-ctrl /dev/nvme1":

vid       : 0x1e49
ssvid     : 0x1e49
sn        : ZTA21T0KA2227304LM
mn        : ZHITAI TiPlus5000 1TB
fr        : ZTA09139
[...]
ps    0 : mp:6.50W operational enlat:0 exlat:0 rrt:0 rrl:0
         rwt:0 rwl:0 idle_power:- active_power:-
ps    1 : mp:5.80W operational enlat:0 exlat:0 rrt:1 rrl:1
         rwt:1 rwl:1 idle_power:- active_power:-
ps    2 : mp:3.60W operational enlat:0 exlat:0 rrt:2 rrl:2
         rwt:2 rwl:2 idle_power:- active_power:-
ps    3 : mp:0.0500W non-operational enlat:5000 exlat:10000 rrt:3 rrl:3
         rwt:3 rwl:3 idle_power:- active_power:-
ps    4 : mp:0.0025W non-operational enlat:8000 exlat:45000 rrt:4 rrl:4
         rwt:4 rwl:4 idle_power:- active_power:-

Reported-and-tested-by: Chang Feng <flukehn@gmail.com>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2 years agonvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM760
Abhijit [Mon, 10 Oct 2022 08:30:05 +0000 (10:30 +0200)]
nvme-pci: add NVME_QUIRK_BOGUS_NID for Lexar NM760

Add a quirk to fix Lexar NM760 SSD drives reporting duplicate nsids.

Signed-off-by: Abhijit <abhijit@abhijittomar.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2 years agonvme-tcp: fix possible hang caused during ctrl deletion
Sagi Grimberg [Wed, 28 Sep 2022 06:23:25 +0000 (09:23 +0300)]
nvme-tcp: fix possible hang caused during ctrl deletion

When we delete a controller, we execute the following:
1. nvme_stop_ctrl() - stop some work elements that may be
inflight or scheduled (specifically also .stop_ctrl
which cancels ctrl error recovery work)
2. nvme_remove_namespaces() - which first flushes scan_work
to avoid competing ns addition/removal
3. continue to teardown the controller

However, if err_work was scheduled to run in (1), it is designed to
cancel any inflight I/O, particularly I/O that is originating from ns
scan_work in (2), but because it is cancelled in .stop_ctrl(), we can
prevent forward progress of (2) as ns scanning is blocking on I/O
(that will never be cancelled).

The race is:
1. transport layer error observed -> err_work is scheduled
2. scan_work executes, discovers ns, generate I/O to it
3. nvme_ctop_ctrl() -> .stop_ctrl() -> cancel_work_sync(err_work)
   - err_work never executed
4. nvme_remove_namespaces() -> flush_work(scan_work)
--> deadlock, because scan_work is blocked on I/O that was supposed
to be cancelled by err_work, but was cancelled before executing (see
stack trace [1]).

Fix this by flushing err_work instead of cancelling it, to force it
to execute and cancel all inflight I/O.

[1]:
--
Call Trace:
 <TASK>
 __schedule+0x390/0x910
 ? scan_shadow_nodes+0x40/0x40
 schedule+0x55/0xe0
 io_schedule+0x16/0x40
 do_read_cache_page+0x55d/0x850
 ? __page_cache_alloc+0x90/0x90
 read_cache_page+0x12/0x20
 read_part_sector+0x3f/0x110
 amiga_partition+0x3d/0x3e0
 ? osf_partition+0x33/0x220
 ? put_partition+0x90/0x90
 bdev_disk_changed+0x1fe/0x4d0
 blkdev_get_whole+0x7b/0x90
 blkdev_get_by_dev+0xda/0x2d0
 device_add_disk+0x356/0x3b0
 nvme_mpath_set_live+0x13c/0x1a0 [nvme_core]
 ? nvme_parse_ana_log+0xae/0x1a0 [nvme_core]
 nvme_update_ns_ana_state+0x3a/0x40 [nvme_core]
 nvme_mpath_add_disk+0x120/0x160 [nvme_core]
 nvme_alloc_ns+0x594/0xa00 [nvme_core]
 nvme_validate_or_alloc_ns+0xb9/0x1a0 [nvme_core]
 ? __nvme_submit_sync_cmd+0x1d2/0x210 [nvme_core]
 nvme_scan_work+0x281/0x410 [nvme_core]
 process_one_work+0x1be/0x380
 worker_thread+0x37/0x3b0
 ? process_one_work+0x380/0x380
 kthread+0x12d/0x150
 ? set_kthread_struct+0x50/0x50
 ret_from_fork+0x1f/0x30
 </TASK>
INFO: task nvme:6725 blocked for more than 491 seconds.
      Not tainted 5.15.65-f0.el7.x86_64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:nvme            state:D
 stack:    0 pid: 6725 ppid:  1761 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x390/0x910
 ? sched_clock+0x9/0x10
 schedule+0x55/0xe0
 schedule_timeout+0x24b/0x2e0
 ? try_to_wake_up+0x358/0x510
 ? finish_task_switch+0x88/0x2c0
 wait_for_completion+0xa5/0x110
 __flush_work+0x144/0x210
 ? worker_attach_to_pool+0xc0/0xc0
 flush_work+0x10/0x20
 nvme_remove_namespaces+0x41/0xf0 [nvme_core]
 nvme_do_delete_ctrl+0x47/0x66 [nvme_core]
 nvme_sysfs_delete.cold.96+0x8/0xd [nvme_core]
 dev_attr_store+0x14/0x30
 sysfs_kf_write+0x38/0x50
 kernfs_fop_write_iter+0x146/0x1d0
 new_sync_write+0x114/0x1b0
 ? intel_pmu_handle_irq+0xe0/0x420
 vfs_write+0x18d/0x270
 ksys_write+0x61/0xe0
 __x64_sys_write+0x1a/0x20
 do_syscall_64+0x37/0x90
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
--

Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver")
Reported-by: Jonathan Nicklin <jnicklin@blockbridge.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Tested-by: Jonathan Nicklin <jnicklin@blockbridge.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2 years agonvme-rdma: fix possible hang caused during ctrl deletion
Sagi Grimberg [Wed, 28 Sep 2022 06:23:26 +0000 (09:23 +0300)]
nvme-rdma: fix possible hang caused during ctrl deletion

When we delete a controller, we execute the following:
1. nvme_stop_ctrl() - stop some work elements that may be
        inflight or scheduled (specifically also .stop_ctrl
        which cancels ctrl error recovery work)
2. nvme_remove_namespaces() - which first flushes scan_work
        to avoid competing ns addition/removal
3. continue to teardown the controller

However, if err_work was scheduled to run in (1), it is designed to
cancel any inflight I/O, particularly I/O that is originating from ns
scan_work in (2), but because it is cancelled in .stop_ctrl(), we can
prevent forward progress of (2) as ns scanning is blocking on I/O
(that will never be cancelled).

The race is:
1. transport layer error observed -> err_work is scheduled
2. scan_work executes, discovers ns, generate I/O to it
3. nvme_ctop_ctrl() -> .stop_ctrl() -> cancel_work_sync(err_work)
   - err_work never executed
4. nvme_remove_namespaces() -> flush_work(scan_work)
--> deadlock, because scan_work is blocked on I/O that was supposed
to be cancelled by err_work, but was cancelled before executing.

Fix this by flushing err_work instead of cancelling it, to force it
to execute and cancel all inflight I/O.

Fixes: b435ecea2a4d ("nvme: Add .stop_ctrl to nvme ctrl ops")
Fixes: f6c8e432cb04 ("nvme: flush namespace scanning work just before removing namespaces")
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2 years agoLoongArch: Update Loongson-3 default config file
Huacai Chen [Wed, 12 Oct 2022 08:36:23 +0000 (16:36 +0800)]
LoongArch: Update Loongson-3 default config file

1, Enable ZBOOT, KEXEC and BPF_JIT;
2, Add more patition types;
3, Add some USB Type-C options;
4, Add some common network options;
5, Add some Bluetooth device drivers;
6, Remove obsolete config options (for some detailed information, see
   Link).

Link: https://lore.kernel.org/kernel-janitors/20220929090645.1389-1-lukas.bulwahn@gmail.com/
Co-developed-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Co-developed-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Co-developed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add ACPI-based generic laptop driver
Jianmin Lv [Wed, 12 Oct 2022 08:36:20 +0000 (16:36 +0800)]
LoongArch: Add ACPI-based generic laptop driver

This add ACPI-based generic laptop driver for Loongson-3. Some of the
codes are derived from drivers/platform/x86/thinkpad_acpi.c.

Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add BPF JIT support
Tiezhu Yang [Wed, 12 Oct 2022 08:36:20 +0000 (16:36 +0800)]
LoongArch: Add BPF JIT support

BPF programs are normally handled by a BPF interpreter, add BPF JIT
support for LoongArch to allow the kernel to generate native code when
a program is loaded into the kernel. This will significantly speed-up
processing of BPF programs.

Co-developed-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add some instruction opcodes and formats
Tiezhu Yang [Wed, 12 Oct 2022 08:36:19 +0000 (16:36 +0800)]
LoongArch: Add some instruction opcodes and formats

According to the "Table of Instruction Encoding" in LoongArch Reference
Manual [1], add some instruction opcodes and formats which are used in
the BPF JIT for LoongArch.

[1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#table-of-instruction-encoding

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Move {signed,unsigned}_imm_check() to inst.h
Tiezhu Yang [Wed, 12 Oct 2022 08:36:19 +0000 (16:36 +0800)]
LoongArch: Move {signed,unsigned}_imm_check() to inst.h

{signed,unsigned}_imm_check() will also be used in the bpf jit, so move
them from module.c to inst.h, this is preparation for later patches.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add kdump support
Youling Tang [Wed, 12 Oct 2022 08:36:19 +0000 (16:36 +0800)]
LoongArch: Add kdump support

This patch adds support for kdump. In kdump case the normal kernel will
reserve a region for the crash kernel and jump there on panic.

Arch-specific functions are added to allow for implementing a crash dump
file interface, /proc/vmcore, which can be viewed as a ELF file.

A user-space tool, such as kexec-tools, is responsible for allocating a
separate region for the core's ELF header within the crash kdump kernel
memory and filling it in when executing kexec_load().

Then, its location will be advertised to the crash dump kernel via a
command line argument "elfcorehdr=", and the crash dump kernel will
preserve this region for later use with arch_reserve_vmcore() at boot
time.

At the same time, the crash kdump kernel is also limited within the
"crashkernel" area via a command line argument "mem=", so as not to
destroy the original kernel dump data.

In the crash dump kernel environment, /proc/vmcore is used to access the
primary kernel's memory with copy_oldmem_page().

I tested kdump on LoongArch machines (Loongson-3A5000) and it works as
expected (suggested crashkernel parameter is "crashkernel=512M@2560M"),
you may test it by triggering a crash through /proc/sysrq-trigger:

 $ sudo kexec -p /boot/vmlinux-kdump --reuse-cmdline --append="nr_cpus=1"
 # echo c > /proc/sysrq-trigger

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add kexec support
Youling Tang [Wed, 12 Oct 2022 08:36:19 +0000 (16:36 +0800)]
LoongArch: Add kexec support

Add three new files, kexec.h, machine_kexec.c and relocate_kernel.S to
the LoongArch architecture, so as to add support for the kexec re-boot
mechanism (CONFIG_KEXEC) on LoongArch platforms.

Kexec supports loading vmlinux.elf in ELF format and vmlinux.efi in PE
format.

I tested kexec on LoongArch machines (Loongson-3A5000) and it works as
expected:

 $ sudo kexec -l /boot/vmlinux.efi --reuse-cmdline
 $ sudo kexec -e

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Use generic BUG() handler
Youling Tang [Wed, 12 Oct 2022 08:36:19 +0000 (16:36 +0800)]
LoongArch: Use generic BUG() handler

Inspired by commit 9fb7410f955("arm64/BUG: Use BRK instruction for
generic BUG traps"), do similar for LoongArch to use generic BUG()
handler.

This patch uses the BREAK software breakpoint instruction to generate
a trap instead, similarly to most other arches, with the generic BUG
code generating the dmesg boilerplate.

This allows bug metadata to be moved to a separate table and reduces
the amount of inline code at BUG() and WARN() sites. This also avoids
clobbering any registers before they can be dumped.

To mitigate the size of the bug table further, this patch makes use of
the existing infrastructure for encoding addresses within the bug table
as 32-bit relative pointers instead of absolute pointers.

(Note: this limits the max kernel size to 2GB.)

Before patch:
[ 3018.338013] lkdtm: Performing direct entry BUG
[ 3018.342445] Kernel bug detected[#5]:
[ 3018.345992] CPU: 2 PID: 865 Comm: cat Tainted: G D 6.0.0-rc6+ #35

After patch:
[  125.585985] lkdtm: Performing direct entry BUG
[  125.590433] ------------[ cut here ]------------
[  125.595020] kernel BUG at drivers/misc/lkdtm/bugs.c:78!
[  125.600211] Oops - BUG[#1]:
[  125.602980] CPU: 3 PID: 410 Comm: cat Not tainted 6.0.0-rc6+ #36

Out-of-line file/line data information obtained compared to before.

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add SysRq-x (TLB Dump) support
Huacai Chen [Wed, 12 Oct 2022 08:36:14 +0000 (16:36 +0800)]
LoongArch: Add SysRq-x (TLB Dump) support

Add SysRq-x (TLB Dump) support for LoongArch, which is useful for
debugging.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add perf events support
Huacai Chen [Wed, 12 Oct 2022 08:36:14 +0000 (16:36 +0800)]
LoongArch: Add perf events support

The perf events infrastructure of LoongArch is very similar to old MIPS-
based Loongson, so most of the codes are derived from MIPS.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2 years agoLoongArch: Add qspinlock support
Huacai Chen [Wed, 12 Oct 2022 08:36:14 +0000 (16:36 +0800)]
LoongArch: Add qspinlock support

On NUMA system, the performance of qspinlock is better than generic
spinlock. Below is the UnixBench test results on a 8 nodes (4 cores
per node, 32 cores in total) machine.

A. With generic spinlock:

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0  449574022.5  38523.9
Double-Precision Whetstone                       55.0      85190.4  15489.2
Execl Throughput                                 43.0      14696.2   3417.7
File Copy 1024 bufsize 2000 maxblocks          3960.0     143157.8    361.5
File Copy 256 bufsize 500 maxblocks            1655.0      37631.8    227.4
File Copy 4096 bufsize 8000 maxblocks          5800.0     444814.2    766.9
Pipe Throughput                               12440.0    5047490.7   4057.5
Pipe-based Context Switching                   4000.0    2021545.7   5053.9
Process Creation                                126.0      23829.8   1891.3
Shell Scripts (1 concurrent)                     42.4      33756.7   7961.5
Shell Scripts (8 concurrent)                      6.0       4062.9   6771.5
System Call Overhead                          15000.0    2479748.6   1653.2
                                                                   ========
System Benchmarks Index Score                                        2955.6

B. With qspinlock:

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0  449467876.9  38514.8
Double-Precision Whetstone                       55.0      85174.6  15486.3
Execl Throughput                                 43.0      14769.1   3434.7
File Copy 1024 bufsize 2000 maxblocks          3960.0     146150.5    369.1
File Copy 256 bufsize 500 maxblocks            1655.0      37496.8    226.6
File Copy 4096 bufsize 8000 maxblocks          5800.0     447527.0    771.6
Pipe Throughput                               12440.0    5175989.2   4160.8
Pipe-based Context Switching                   4000.0    2207747.8   5519.4
Process Creation                                126.0      25125.5   1994.1
Shell Scripts (1 concurrent)                     42.4      33461.2   7891.8
Shell Scripts (8 concurrent)                      6.0       4024.7   6707.8
System Call Overhead                          15000.0    2917278.6   1944.9
                                                                   ========
System Benchmarks Index Score                                        3040.1

Signed-off-by: Rui Wang <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>