linux-2.6-microblaze.git
13 months agoMerge tag 'acpi-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 13 Oct 2023 16:25:30 +0000 (09:25 -0700)]
Merge tag 'acpi-6.6-rc6' of git://git./linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "Add an ACPI EC GPE detection quirk for HP Pavilion Gaming 15-dk1xxx
  and ACPI IRQ override quirks for TongFang GM6BGEQ, GM6BG5Q and
  GM6BG0Q, and for ASUS ExpertBook B1402CBA (Hans de Goede).

* tag 'acpi-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: resource: Add TongFang GM6BGEQ, GM6BG5Q and GM6BG0Q to irq1_edge_low_force_override[]
  ACPI: EC: Add quirk for the HP Pavilion Gaming 15-dk1xxx
  ACPI: resource: Skip IRQ override on ASUS ExpertBook B1402CBA

13 months agoMerge tag 'riscv-for-linus-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 13 Oct 2023 16:17:48 +0000 (09:17 -0700)]
Merge tag 'riscv-for-linus-6.6-rc6' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - A handful of build fixes

 - A fix to avoid mixing up user/kernel-mode breakpoints, which can
   manifest as a hang when mixing k/uprobes with other breakpoint
   sources

 - A fix to avoid double-allocting crash kernel memory

 - A fix for tracefs syscall name mangling, which was causing syscalls
   not to show up in tracefs

 - A fix to the perf driver to enable the hw events when selected, which
   can trigger a BUG on some userspace access patterns

* tag 'riscv-for-linus-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  drivers: perf: Fix panic in riscv SBI mmap support
  riscv: Fix ftrace syscall handling which are now prefixed with __riscv_
  RISC-V: Fix wrong use of CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK
  riscv: kdump: fix crashkernel reserving problem on RISC-V
  riscv: Remove duplicate objcopy flag
  riscv: signal: fix sigaltstack frame size checking
  riscv: errata: andes: Makefile: Fix randconfig build issue
  riscv: Only consider swbp/ss handlers for correct privileged mode
  riscv: kselftests: Fix mm build by removing testcases subdirectory

13 months agoMerge tag 'soundwire-6.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 13 Oct 2023 16:03:48 +0000 (09:03 -0700)]
Merge tag 'soundwire-6.6-fixes' of git://git./linux/kernel/git/vkoul/soundwire

Pull soundwire fix from Vinod Koul:
 "A single fix for making sdw bus irq conditionally built"

* tag 'soundwire-6.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
  soundwire: bus: Make IRQ handling conditionally built

13 months agoMerge tag 'dmaengine-fix-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
Linus Torvalds [Fri, 13 Oct 2023 15:52:57 +0000 (08:52 -0700)]
Merge tag 'dmaengine-fix-6.6' of git://git./linux/kernel/git/vkoul/dmaengine

Pull dmaengine fixes from Vinod Koul:
 "Driver fixes for:

   - stm32 dma residue calculation and chaining

   - stm32 mdma for setting inflight bytes, residue calculation and
     resume abort

   - channel request, channel enable and dma error in fsl_edma

   - runtime pm imbalance in ste_dma40 driver

   - deadlock fix in mediatek driver"

* tag 'dmaengine-fix-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
  dmaengine: fsl-edma: fix all channels requested when call fsl_edma3_xlate()
  dmaengine: stm32-dma: fix residue in case of MDMA chaining
  dmaengine: stm32-dma: fix stm32_dma_prep_slave_sg in case of MDMA chaining
  dmaengine: stm32-mdma: set in_flight_bytes in case CRQA flag is set
  dmaengine: stm32-mdma: use Link Address Register to compute residue
  dmaengine: stm32-mdma: abort resume if no ongoing transfer
  dmaengine: ste_dma40: Fix PM disable depth imbalance in d40_probe
  dmaengine: mediatek: Fix deadlock caused by synchronize_irq()
  dmaengine: idxd: use spin_lock_irqsave before wait_event_lock_irq
  dmaengine: fsl-edma: fix edma4 channel enable failure on second attempt
  dt-bindings: dmaengine: zynqmp_dma: add xlnx,bus-width required property
  dmaengine: fsl-dma: fix DMA error when enabling sg if 'DONE' bit is set

13 months agoMerge tag 'media/v6.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Fri, 13 Oct 2023 15:47:29 +0000 (08:47 -0700)]
Merge tag 'media/v6.6-5' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

 - a core fix: Don't report V4L2_SUBDEV_CAP_STREAMS when API is disabled

 - ipu-bridge: Add a missing acpi_dev_put()

 - ov8858: fix driver for probe to work after 6.6-rc1

 - xilinx-vipp: fix async notifier logic

* tag 'media/v6.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: i2c: ov8858: Don't set fwnode in the driver
  media: ipu-bridge: Add missing acpi_dev_put() in ipu_bridge_get_ivsc_acpi_dev()
  media: xilinx-vipp: Look for entities also in waiting_list
  media: subdev: Don't report V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled

13 months agoMerge branches 'acpi-ec' and 'acpi-resource'
Rafael J. Wysocki [Fri, 13 Oct 2023 14:51:54 +0000 (16:51 +0200)]
Merge branches 'acpi-ec' and 'acpi-resource'

Merge ACPI EC driver and ACPI resources handlig changes for 6.6-rc6:

 - Add EC GPE fixup quirk for HP Pavilion Gaming 15-dk1xxx (Hans de
   Goede).

 - Add ACPI IRQ override quirks for TongFang GM6BGEQ, GM6BG5Q and
   GM6BG0Q, and for ASUS ExpertBook B1402CBA (ans de Goede).

* acpi-ec:
  ACPI: EC: Add quirk for the HP Pavilion Gaming 15-dk1xxx

* acpi-resource:
  ACPI: resource: Add TongFang GM6BGEQ, GM6BG5Q and GM6BG0Q to irq1_edge_low_force_override[]
  ACPI: resource: Skip IRQ override on ASUS ExpertBook B1402CBA

13 months agoMerge tag 'drm-fixes-2023-10-13' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 13 Oct 2023 05:43:35 +0000 (22:43 -0700)]
Merge tag 'drm-fixes-2023-10-13' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Weekly fixes, the core is msm and amdgpu with some scattered fixes
  across vmwgfx, panel and the core stuff.

  atomic-helper:
   - Relax checks for unregistered connectors

  dma-buf:
   - Work around race condition when retrieving fence timestamp

  gem:
   - Avoid OOB access in BO memory range

  panel:
   - boe-tv101wun-ml6: Fix flickering

  simpledrm:
   - Fix error output

  vwmgfx:
   - Fix size calculation in texture-state code
   - Ref GEM BOs in surfaces

  msm:
   - PHY/link training reset fix
   - msm8998 - correct highest bank bit
   - skip video mode if timing engine disabled
   - check irq_of_parse_and_map return code
   - add new lines to some prints
   - fail atomic check for max mdp clk test

  amdgpu:
   - Seamless boot fix
   - Fix TTM BO resource check
   - SI fix for doorbell handling"

* tag 'drm-fixes-2023-10-13' of git://anongit.freedesktop.org/drm/drm:
  drm/tiny: correctly print `struct resource *` on error
  drm: Do not overrun array in drm_gem_get_pages()
  drm/atomic-helper: relax unregistered connector check
  drm/panel: boe-tv101wum-nl6: Completely pull GPW to VGL before TP term
  drm/amdgpu: fix SI failure due to doorbells allocation
  drm/amdgpu: add missing NULL check
  drm/amd/display: Don't set dpms_off for seamless boot
  drm/vmwgfx: Keep a gem reference to user bos in surfaces
  drm/vmwgfx: fix typo of sizeof argument
  drm/msm/dpu: fail dpu_plane_atomic_check() based on mdp clk limits
  dma-buf: add dma_fence_timestamp helper
  drm/msm/dp: Add newlines to debug printks
  drm/msm/dpu: change _dpu_plane_calc_bw() to use u64 to avoid overflow
  drm/msm/dsi: fix irq_of_parse_and_map() error checking
  drm/msm/dsi: skip the wait for video mode done if not applicable
  drm/msm/mdss: fix highest-bank-bit for msm8998
  drm/msm/dp: do not reinitialize phy unless retry during link training

13 months agoMerge tag 'amd-drm-fixes-6.6-2023-10-11' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 13 Oct 2023 03:20:14 +0000 (13:20 +1000)]
Merge tag 'amd-drm-fixes-6.6-2023-10-11' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.6-2023-10-11:

amdgpu:
- Seemless boot fix
- Fix TTM BO resource check
- SI fix for doorbell handling

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231012025637.7783-1-alexander.deucher@amd.com
13 months agoMerge tag 'drm-msm-fixes-2023-10-07' of https://gitlab.freedesktop.org/drm/msm into...
Dave Airlie [Fri, 13 Oct 2023 03:07:05 +0000 (13:07 +1000)]
Merge tag 'drm-msm-fixes-2023-10-07' of https://gitlab.freedesktop.org/drm/msm into drm-fixes

Fixes for v6.6-rc5

- fix to not reset the PHY everytime we start link training but only
  do it if link training fails. Without this, the PLL unlocked
  interrupt fires causing "Unexpected DP AUX IRQ 0x01000000 when
  not busy" spam in the logs since last 2-3 cycles
- correct the highest bank bit to match downstream device tree for
  msm8998
- skip the video mode wait if the timing engine is not enabled. This
  was introduced after pre_enable flag for DSI video mode panels
  where we would end up waiting for the video mode done interrupt
  even before enabling timing engine causing error spam and long
  bootup times.
- check the correct return code of irq_of_parse_and_map() in DSI code
- avoid overflow issues in the dpu bandwidth calculation . This was
  exposed for high resolution displays and a critical fix to avoid
  atomic_check failure
- minor fix to add new lines in DP print messages.
- Fix to fail atomic_check() if the resolution exceeds max mdp clk.
  This leads to underflow otherwise if we try to allow that frame.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGv-HNxQ=VBtZ8geGzYJum9jtManEdbvhcjo_WWF_J9Ziw@mail.gmail.com
13 months agoMerge tag 'for-v6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux...
Linus Torvalds [Fri, 13 Oct 2023 02:41:27 +0000 (19:41 -0700)]
Merge tag 'for-v6.6-rc2' of git://git./linux/kernel/git/sre/linux-power-supply

Pull power supply fixes from Sebastian Reichel:

 - qcom_battmgr: endianness fixes

* tag 'for-v6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  power: supply: qcom_battmgr: fix enable request endianness
  power: supply: qcom_battmgr: fix battery_id type

13 months agoMerge tag 'block-6.6-2023-10-12' of git://git.kernel.dk/linux
Linus Torvalds [Fri, 13 Oct 2023 02:24:42 +0000 (19:24 -0700)]
Merge tag 'block-6.6-2023-10-12' of git://git.kernel.dk/linux

Pull block fix from Jens Axboe:
 "Just a single fix for a longstanding regression with using fallocate
  on a block device"

* tag 'block-6.6-2023-10-12' of git://git.kernel.dk/linux:
  block: Don't invalidate pagecache for invalid falloc modes

13 months agoMerge tag 'drm-misc-fixes-2023-10-12' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 13 Oct 2023 01:04:53 +0000 (11:04 +1000)]
Merge tag 'drm-misc-fixes-2023-10-12' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Short summary of fixes pull:

 * atomic-helper: Relax checks for unregistered connectors
 * dma-buf: Work around race condition when retrieving fence timestamp
 * gem: Avoid OOB access in BO memory range
 * panel:
   * boe-tv101wun-ml6: Fix flickering
 * simpledrm: Fix error output
 * vwmgfx:
   * Fix size calculation in texture-state code
   * Ref GEM BOs in surfaces

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231012111638.GA25037@linux-uq9g
13 months agoMerge tag 'cgroup-for-6.6-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 13 Oct 2023 00:30:35 +0000 (17:30 -0700)]
Merge tag 'cgroup-for-6.6-rc5-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - In cgroup1, the `tasks` file could have duplicate pids which can
   trigger a warning in seq_file. Fix it by removing duplicate items
   after sorting

 - Comment update

* tag 'cgroup-for-6.6-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: Fix incorrect css_set_rwsem reference in comment
  cgroup: Remove duplicates in cgroup v1 tasks file

13 months agoMerge tag 'wq-for-6.6-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 13 Oct 2023 00:16:10 +0000 (17:16 -0700)]
Merge tag 'wq-for-6.6-rc5-fixes' of git://git./linux/kernel/git/tj/wq

Pull workqueue fixes from Tejun Heo:

 - Fix access-after-free in pwq allocation error path

 - Implicitly ordered unbound workqueues should lose the implicit
   ordering if an attribute change which isn't compatible with ordered
   operation is requested. However, attribute changes requested through
   the sysfs interface weren't doing that leaving no way to override the
   implicit ordering through the sysfs interface. Fix it.

 - Other doc and misc updates

* tag 'wq-for-6.6-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: fix -Wformat-truncation in create_worker
  workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()
  workqueue: Use the kmem_cache_free() instead of kfree() to release pwq
  workqueue: doc: Fix function and sysfs path errors
  workqueue: Fix UAF report by KASAN in pwq_release_workfn()

13 months agoMerge tag 'net-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 12 Oct 2023 20:07:00 +0000 (13:07 -0700)]
Merge tag 'net-6.6-rc6' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from CAN and BPF.

  We have a regression in TC currently under investigation, otherwise
  the things that stand off most are probably the TCP and AF_PACKET
  fixes, with both issues coming from 6.5.

  Previous releases - regressions:

   - af_packet: fix fortified memcpy() without flex array.

   - tcp: fix crashes trying to free half-baked MTU probes

   - xdp: fix zero-size allocation warning in xskq_create()

   - can: sja1000: always restart the tx queue after an overrun

   - eth: mlx5e: again mutually exclude RX-FCS and RX-port-timestamp

   - eth: nfp: avoid rmmod nfp crash issues

   - eth: octeontx2-pf: fix page pool frag allocation warning

  Previous releases - always broken:

   - mctp: perform route lookups under a RCU read-side lock

   - bpf: s390: fix clobbering the caller's backchain in the trampoline

   - phy: lynx-28g: cancel the CDR check work item on the remove path

   - dsa: qca8k: fix qca8k driver for Turris 1.x

   - eth: ravb: fix use-after-free issue in ravb_tx_timeout_work()

   - eth: ixgbe: fix crash with empty VF macvlan list"

* tag 'net-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (54 commits)
  rswitch: Fix imbalance phy_power_off() calling
  rswitch: Fix renesas_eth_sw_remove() implementation
  octeontx2-pf: Fix page pool frag allocation warning
  nfc: nci: assert requested protocol is valid
  af_packet: Fix fortified memcpy() without flex array.
  net: tcp: fix crashes trying to free half-baked MTU probes
  net/smc: Fix pos miscalculation in statistics
  nfp: flower: avoid rmmod nfp crash issues
  net: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read
  ethtool: Fix mod state of verbose no_mask bitset
  net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()
  mctp: perform route lookups under a RCU read-side lock
  net: skbuff: fix kernel-doc typos
  s390/bpf: Fix unwinding past the trampoline
  s390/bpf: Fix clobbering the caller's backchain in the trampoline
  net/mlx5e: Again mutually exclude RX-FCS and RX-port-timestamp
  net/smc: Fix dependency of SMC on ISM
  ixgbe: fix crash with empty VF macvlan list
  net/mlx5e: macsec: use update_pn flag instead of PN comparation
  net: phy: mscc: macsec: reject PN update requests
  ...

13 months agoworkqueue: fix -Wformat-truncation in create_worker
Lucy Mielke [Mon, 9 Oct 2023 17:09:46 +0000 (19:09 +0200)]
workqueue: fix -Wformat-truncation in create_worker

Compiling with W=1 emitted the following warning
(Compiler: gcc (x86-64, ver. 13.2.1, .config: result of make allyesconfig,
"Treat warnings as errors" turned off):

kernel/workqueue.c:2188:54: warning: ‘%d’ directive output may be
truncated writing between 1 and 10 bytes into a region of size
between 5 and 14 [-Wformat-truncation=]
kernel/workqueue.c:2188:50: note: directive argument in the range
[0, 2147483647]
kernel/workqueue.c:2188:17: note: ‘snprintf’ output between 4 and 23 bytes
into a destination of size 16

setting "id_buf" to size 23 will silence the warning, since GCC
determines snprintf's output to be max. 23 bytes in line 2188.

Please let me know if there are any mistakes in my patch!

Signed-off-by: Lucy Mielke <lucymielke@icloud.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agoworkqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()
Waiman Long [Wed, 11 Oct 2023 02:48:42 +0000 (22:48 -0400)]
workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()

Commit 5c0338c68706 ("workqueue: restore WQ_UNBOUND/max_active==1
to be ordered") enabled implicit ordered attribute to be added to
WQ_UNBOUND workqueues with max_active of 1. This prevented the changing
of attributes to these workqueues leading to fix commit 0a94efb5acbb
("workqueue: implicit ordered attribute should be overridable").

However, workqueue_apply_unbound_cpumask() was not updated at that time.
So sysfs changes to wq_unbound_cpumask has no effect on WQ_UNBOUND
workqueues with implicit ordered attribute. Since not all WQ_UNBOUND
workqueues are visible on sysfs, we are not able to make all the
necessary cpumask changes even if we iterates all the workqueue cpumasks
in sysfs and changing them one by one.

Fix this problem by applying the corresponding change made
to apply_workqueue_attrs_locked() in the fix commit to
workqueue_apply_unbound_cpumask().

Fixes: 5c0338c68706 ("workqueue: restore WQ_UNBOUND/max_active==1 to be ordered")
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agoMerge tag 'soc-fixes-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Thu, 12 Oct 2023 18:52:23 +0000 (11:52 -0700)]
Merge tag 'soc-fixes-6.6-2' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "AngeloGioacchino Del Regno is stepping in as co-maintainer for the
  MediaTek SoC platform and starts by sending some dts fixes for the
  mt8195 platform that had been pending for a while.

  On the ixp4xx platform, Krzysztof Halasa steps down as co-maintainer,
  reflecting that Linus Walleij has been handling this on his own for
  the past few years.

  Generic RISC-V kernels are now marked as incompatible with the RZ/Five
  platform that requires custom hacks both for managing its DMA bounce
  buffers and for addressing low virtual memory.

 Finally, there is one bugfix for the AMDTEE firmware driver to prevent
 a use-after-free bug"

* tag 'soc-fixes-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  IXP4xx MAINTAINERS entries
  arm64: dts: mediatek: mt8195: Set DSU PMU status to fail
  arm64: dts: mediatek: fix t-phy unit name
  arm64: dts: mediatek: mt8195-demo: update and reorder reserved memory regions
  arm64: dts: mediatek: mt8195-demo: fix the memory size to 8GB
  MAINTAINERS: Add Angelo as MediaTek SoC co-maintainer
  soc: renesas: Make ARCH_R9A07G043 (riscv version) depend on NONPORTABLE
  tee: amdtee: fix use-after-free vulnerability in amdtee_close_session

13 months agodrivers: perf: Fix panic in riscv SBI mmap support
Alexandre Ghiti [Fri, 6 Oct 2023 08:20:10 +0000 (10:20 +0200)]
drivers: perf: Fix panic in riscv SBI mmap support

The following panic can happen when mmap is called before the pmu add
callback which sets the hardware counter index: this happens for example
with the following command `perf record --no-bpf-event -n kill`.

[   99.461486] CPU: 1 PID: 1259 Comm: perf Tainted: G            E      6.6.0-rc4ubuntu-defconfig #2
[   99.461669] Hardware name: riscv-virtio,qemu (DT)
[   99.461748] epc : pmu_sbi_set_scounteren+0x42/0x44
[   99.462337]  ra : smp_call_function_many_cond+0x126/0x5b0
[   99.462369] epc : ffffffff809f9d24 ra : ffffffff800f93e0 sp : ff60000082153aa0
[   99.462407]  gp : ffffffff82395c98 tp : ff6000009a218040 t0 : ff6000009ab3a4f0
[   99.462425]  t1 : 0000000000000004 t2 : 0000000000000100 s0 : ff60000082153ab0
[   99.462459]  s1 : 0000000000000000 a0 : ff60000098869528 a1 : 0000000000000000
[   99.462473]  a2 : 000000000000001f a3 : 0000000000f00000 a4 : fffffffffffffff8
[   99.462488]  a5 : 00000000000000cc a6 : 0000000000000000 a7 : 0000000000735049
[   99.462502]  s2 : 0000000000000001 s3 : ffffffff809f9ce2 s4 : ff60000098869528
[   99.462516]  s5 : 0000000000000002 s6 : 0000000000000004 s7 : 0000000000000001
[   99.462530]  s8 : ff600003fec98bc0 s9 : ffffffff826c5890 s10: ff600003fecfcde0
[   99.462544]  s11: ff600003fec98bc0 t3 : ffffffff819e2558 t4 : ff1c000004623840
[   99.462557]  t5 : 0000000000000901 t6 : ff6000008feeb890
[   99.462570] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
[   99.462658] [<ffffffff809f9d24>] pmu_sbi_set_scounteren+0x42/0x44
[   99.462979] Code: 1060 4785 97bb 00d7 8fd9 9073 1067 6422 0141 8082 (9002) 0013
[   99.463335] Kernel BUG [#2]

To circumvent this, try to enable userspace access to the hardware counter
when it is selected in addition to when the event is mapped. And vice-versa
when the event is stopped/unmapped.

Fixes: cc4c07c89aad ("drivers: perf: Implement perf event mmap support in the SBI backend")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20231006082010.11963-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoriscv: Fix ftrace syscall handling which are now prefixed with __riscv_
Alexandre Ghiti [Tue, 3 Oct 2023 18:24:07 +0000 (20:24 +0200)]
riscv: Fix ftrace syscall handling which are now prefixed with __riscv_

ftrace creates entries for each syscall in the tracefs but has failed
since commit 08d0ce30e0e4 ("riscv: Implement syscall wrappers") which
prefixes all riscv syscalls with __riscv_.

So fix this by implementing arch_syscall_match_sym_name() which allows us
to ignore this prefix.

And also ignore compat syscalls like x86/arm64 by implementing
arch_trace_is_compat_syscall().

Fixes: 08d0ce30e0e4 ("riscv: Implement syscall wrappers")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20231003182407.32198-1-alexghiti@rivosinc.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoMerge tag 'pmdomain-v6.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 12 Oct 2023 18:34:23 +0000 (11:34 -0700)]
Merge tag 'pmdomain-v6.6-rc1-2' of git://git./linux/kernel/git/ulfh/linux-pm

Pull pmdomain fix from Ulf Hansson:

 - imx: scu-pd: Correct the DMA2 channel

* tag 'pmdomain-v6.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm:
  pmdomain: imx: scu-pd: correct DMA2 channel

13 months agoRISC-V: Fix wrong use of CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK
Jiexun Wang [Wed, 13 Sep 2023 05:29:40 +0000 (13:29 +0800)]
RISC-V: Fix wrong use of CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK

If configuration options SOFTIRQ_ON_OWN_STACK and PREEMPT_RT
are enabled simultaneously under RISC-V architecture,
it will result in a compilation failure:

arch/riscv/kernel/irq.c:64:6: error: redefinition of 'do_softirq_own_stack'
   64 | void do_softirq_own_stack(void)
      |      ^~~~~~~~~~~~~~~~~~~~
In file included from ./arch/riscv/include/generated/asm/softirq_stack.h:1,
                 from arch/riscv/kernel/irq.c:15:
./include/asm-generic/softirq_stack.h:8:20: note: previous definition of 'do_softirq_own_stack' was here
    8 | static inline void do_softirq_own_stack(void)
      |                    ^~~~~~~~~~~~~~~~~~~~

After changing CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK to CONFIG_SOFTIRQ_ON_OWN_STACK,
compilation can be successful.

Fixes: dd69d07a5a6c ("riscv: stack: Support HAVE_SOFTIRQ_ON_OWN_STACK")
Reviewed-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Jiexun Wang <wangjiexun@tinylab.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20230913052940.374686-1-wangjiexun@tinylab.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoriscv: kdump: fix crashkernel reserving problem on RISC-V
Chen Jiahao [Mon, 25 Sep 2023 02:43:33 +0000 (10:43 +0800)]
riscv: kdump: fix crashkernel reserving problem on RISC-V

When testing on risc-v QEMU environment with "crashkernel="
parameter enabled, a problem occurred with the following
message:

[    0.000000] crashkernel low memory reserved: 0xf8000000 - 0x100000000 (128 MB)
[    0.000000] crashkernel reserved: 0x0000000177e00000 - 0x0000000277e00000 (4096 MB)
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at kernel/resource.c:779 __insert_resource+0x8e/0xd0
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.6.0-rc2-next-20230920 #1
[    0.000000] Hardware name: riscv-virtio,qemu (DT)
[    0.000000] epc : __insert_resource+0x8e/0xd0
[    0.000000]  ra : insert_resource+0x28/0x4e
[    0.000000] epc : ffffffff80017344 ra : ffffffff8001742e sp : ffffffff81203db0
[    0.000000]  gp : ffffffff812ece98 tp : ffffffff8120dac0 t0 : ff600001f7ff2b00
[    0.000000]  t1 : 0000000000000000 t2 : 3428203030303030 s0 : ffffffff81203dc0
[    0.000000]  s1 : ffffffff81211e18 a0 : ffffffff81211e18 a1 : ffffffff81289380
[    0.000000]  a2 : 0000000277dfffff a3 : 0000000177e00000 a4 : 0000000177e00000
[    0.000000]  a5 : ffffffff81289380 a6 : 0000000277dfffff a7 : 0000000000000078
[    0.000000]  s2 : ffffffff81289380 s3 : ffffffff80a0bac8 s4 : ff600001f7ff2880
[    0.000000]  s5 : 0000000000000280 s6 : 8000000a00006800 s7 : 000000000000007f
[    0.000000]  s8 : 0000000080017038 s9 : 0000000080038ea0 s10: 0000000000000000
[    0.000000]  s11: 0000000000000000 t3 : ffffffff80a0bc00 t4 : ffffffff80a0bc00
[    0.000000]  t5 : ffffffff80a0bbd0 t6 : ffffffff80a0bc00
[    0.000000] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
[    0.000000] [<ffffffff80017344>] __insert_resource+0x8e/0xd0
[    0.000000] ---[ end trace 0000000000000000 ]---
[    0.000000] Failed to add a Crash kernel resource at 177e00000

The crashkernel memory has been allocated successfully, whereas
it failed to insert into iomem_resource. This is due to the
unique reserving logic in risc-v arch specific code, i.e.
crashk_res/crashk_low_res will be added into iomem_resource
later in init_resources(), which is not aligned with current
unified reserving logic in reserve_crashkernel_{generic,low}()
and therefore leads to the failure of crashkernel reservation.

Removing the arch specific code within #ifdef CONFIG_KEXEC_CORE
in init_resources() to fix above problem.

Fixes: 31549153088e ("riscv: kdump: use generic interface to simplify crashkernel reservation")
Signed-off-by: Chen Jiahao <chenjiahao16@huawei.com>
Link: https://lore.kernel.org/r/20230925024333.730964-1-chenjiahao16@huawei.com
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoriscv: Remove duplicate objcopy flag
Song Shuai [Thu, 14 Sep 2023 09:13:34 +0000 (17:13 +0800)]
riscv: Remove duplicate objcopy flag

There are two duplicate `-O binary` flags when objcopying from vmlinux
to Image/xipImage.

RISC-V set `-O binary` flag in both OBJCOPYFLAGS in the top-level riscv
Makefile and OBJCOPYFLAGS_* in the boot/Makefile, and the objcopy cmd
in Kbuild would join them together.

The `-O binary` flag is only needed for objcopying Image, so remove the
OBJCOPYFLAGS in the top-level riscv Makefile.

Fixes: c0fbcd991860 ("RISC-V: Build flat and compressed kernel images")
Signed-off-by: Song Shuai <songshuaishuai@tinylab.org>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20230914091334.1458542-1-songshuaishuai@tinylab.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoMerge tag 'pinctrl-v6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Thu, 12 Oct 2023 17:48:19 +0000 (10:48 -0700)]
Merge tag 'pinctrl-v6.6-2' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "Some pin control fixes for v6.6 which have been stacking up in my
  tree.

  Dmitry's fix to some locking in the core is the most substantial, that
  was a really neat fix.

  The rest is the usual assorted spray of minor driver fixes.

   - Drop some minor code causing warnings in the Lantiq driver

   - Fix out of bounds write in the Nuvoton driver

   - Fix lost IRQs with CONFIG_PM in the Starfive driver

   - Fix a locking issue in find_pinctrl()

   - Revert a regressive Tegra debug patch

   - Fix the Renesas RZN1 pin muxing"

* tag 'pinctrl-v6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: renesas: rzn1: Enable missing PINMUX
  Revert "pinctrl: tegra: Add support to display pin function"
  pinctrl: avoid unsafe code pattern in find_pinctrl()
  pinctrl: starfive: jh7110: Add system pm ops to save and restore context
  pinctrl: starfive: jh7110: Fix failure to set irq after CONFIG_PM is enabled
  pinctrl: nuvoton: wpcm450: fix out of bounds write
  pinctrl: lantiq: Remove unsued declaration ltq_pinctrl_unregister()

13 months agoworkqueue: Use the kmem_cache_free() instead of kfree() to release pwq
Zqiang [Wed, 11 Oct 2023 08:27:59 +0000 (16:27 +0800)]
workqueue: Use the kmem_cache_free() instead of kfree() to release pwq

Currently, the kfree() be used for pwq objects allocated with
kmem_cache_alloc() in alloc_and_link_pwqs(), this isn't wrong.
but usually, use "trace_kmem_cache_alloc/trace_kmem_cache_free"
to track memory allocation and free. this commit therefore use
kmem_cache_free() instead of kfree() in alloc_and_link_pwqs()
and also consistent with release of the pwq in rcu_free_pwq().

Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agoworkqueue: doc: Fix function and sysfs path errors
WangJinchao [Thu, 12 Oct 2023 07:17:38 +0000 (15:17 +0800)]
workqueue: doc: Fix function and sysfs path errors

alloc_ordered_queue -> alloc_ordered_workqueue
/sys/devices/virtual/WQ_NAME/
    -> /sys/devices/virtual/workqueue/WQ_NAME/

Signed-off-by: WangJinchao <wangjinchao@xfusion.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agocgroup: Fix incorrect css_set_rwsem reference in comment
Waiman Long [Thu, 12 Oct 2023 17:09:02 +0000 (13:09 -0400)]
cgroup: Fix incorrect css_set_rwsem reference in comment

Since commit f0d9a5f17575 ("cgroup: make css_set_rwsem a spinlock
and rename it to css_set_lock"), css_set_rwsem has been replaced by
css_set_lock. That commit, however, missed the css_set_rwsem reference
in include/linux/cgroup-defs.h. Fix that by changing it to css_set_lock
as well.

Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
13 months agoriscv: signal: fix sigaltstack frame size checking
Andy Chiu [Tue, 22 Aug 2023 16:49:03 +0000 (16:49 +0000)]
riscv: signal: fix sigaltstack frame size checking

The alternative stack checking in get_sigframe introduced by the Vector
support is not needed and has a problem. It is not needed as we have
already validate it at the beginning of the function if we are already
on an altstack. If not, the size of an altstack is always validated at
its allocation stage with sigaltstack_size_valid().

Besides, we must only regard the size of an altstack if the handler of a
signal is registered with SA_ONSTACK. So, blindly checking overflow of
an altstack if sas_ss_size not equals to zero will check against wrong
signal handlers if only a subset of signals are registered with
SA_ONSTACK.

Fixes: 8ee0b41898fa ("riscv: signal: Add sigcontext save/restore for vector")
Reported-by: Prashanth Swaminathan <prashanthsw@google.com>
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Link: https://lore.kernel.org/r/20230822164904.21660-1-andy.chiu@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
13 months agoIXP4xx MAINTAINERS entries
Krzysztof Hałasa [Wed, 11 Oct 2023 05:06:29 +0000 (07:06 +0200)]
IXP4xx MAINTAINERS entries

Update MAINTAINERS entries for Intel IXP4xx SoCs.

Linus has been handling all IXP4xx stuff since 2019 or so.

Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Deepak Saxena <dsaxena@plexity.net>
Link: https://lore.kernel.org/r/m3ttqxu4ru.fsf@t19.piap.pl
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
13 months agoMerge branch 'rswitch-fix-issues-on-specific-conditions'
Paolo Abeni [Thu, 12 Oct 2023 09:22:24 +0000 (11:22 +0200)]
Merge branch 'rswitch-fix-issues-on-specific-conditions'

Yoshihiro Shimoda says:

====================
rswitch: Fix issues on specific conditions

This patch series fix some issues of rswitch driver on specific
condtions.
====================

Link: https://lore.kernel.org/r/20231010124858.183891-1-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agorswitch: Fix imbalance phy_power_off() calling
Yoshihiro Shimoda [Tue, 10 Oct 2023 12:48:58 +0000 (21:48 +0900)]
rswitch: Fix imbalance phy_power_off() calling

The phy_power_off() should not be called if phy_power_on() failed.
So, add a condition .power_count before calls phy_power_off().

Fixes: 5cb630925b49 ("net: renesas: rswitch: Add phy_power_{on,off}() calling")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agorswitch: Fix renesas_eth_sw_remove() implementation
Yoshihiro Shimoda [Tue, 10 Oct 2023 12:48:57 +0000 (21:48 +0900)]
rswitch: Fix renesas_eth_sw_remove() implementation

Fix functions calling order and a condition in renesas_eth_sw_remove().
Otherwise, kernel NULL pointer dereference happens from phy_stop() if
a net device opens.

Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agodrm/tiny: correctly print `struct resource *` on error
Joey Gouly [Tue, 10 Oct 2023 17:46:52 +0000 (18:46 +0100)]
drm/tiny: correctly print `struct resource *` on error

The `res` variable is already a `struct resource *`, don't take the address of it.

Fixes incorrect output:

simple-framebuffer 9e20dc000.framebuffer: [drm] *ERROR* could not acquire memory range [??? 0xffff4be88a387d00-0xfffffefffde0a240 flags 0x0]: -16

To be correct:

simple-framebuffer 9e20dc000.framebuffer: [drm] *ERROR* could not acquire memory range [mem 0x9e20dc000-0x9e307bfff flags 0x200]: -16

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Fixes: 9a10c7e6519b ("drm/simpledrm: Add support for system memory framebuffers")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v6.3+
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231010174652.2439513-1-joey.gouly@arm.com
13 months agodrm: Do not overrun array in drm_gem_get_pages()
Matthew Wilcox (Oracle) [Thu, 5 Oct 2023 13:56:47 +0000 (14:56 +0100)]
drm: Do not overrun array in drm_gem_get_pages()

If the shared memory object is larger than the DRM object that it backs,
we can overrun the page array.  Limit the number of pages we install
from each folio to prevent this.

Signed-off-by: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Link: https://lore.kernel.org/lkml/13360591.uLZWGnKmhe@natalenko.name/
Fixes: 3291e09a4638 ("drm: convert drm_gem_put_pages() to use a folio_batch")
Cc: stable@vger.kernel.org # 6.5.x
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231005135648.2317298-1-willy@infradead.org
13 months agoocteontx2-pf: Fix page pool frag allocation warning
Ratheesh Kannoth [Tue, 10 Oct 2023 03:48:42 +0000 (09:18 +0530)]
octeontx2-pf: Fix page pool frag allocation warning

Since page pool param's "order" is set to 0, will result
in below warn message if interface is configured with higher
rx buffer size.

Steps to reproduce the issue.
1. devlink dev param set pci/0002:04:00.0 name receive_buffer_size \
   value 8196 cmode runtime
2. ifconfig eth0 up

[   19.901356] ------------[ cut here ]------------
[   19.901361] WARNING: CPU: 11 PID: 12331 at net/core/page_pool.c:567 page_pool_alloc_frag+0x3c/0x230
[   19.901449] pstate: 82401009 (Nzcv daif +PAN -UAO +TCO -DIT +SSBS BTYPE=--)
[   19.901451] pc : page_pool_alloc_frag+0x3c/0x230
[   19.901453] lr : __otx2_alloc_rbuf+0x60/0xbc [rvu_nicpf]
[   19.901460] sp : ffff80000f66b970
[   19.901461] x29: ffff80000f66b970 x28: 0000000000000000 x27: 0000000000000000
[   19.901464] x26: ffff800000d15b68 x25: ffff000195b5c080 x24: ffff0002a5a32dc0
[   19.901467] x23: ffff0001063c0878 x22: 0000000000000100 x21: 0000000000000000
[   19.901469] x20: 0000000000000000 x19: ffff00016f781000 x18: 0000000000000000
[   19.901472] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[   19.901474] x14: 0000000000000000 x13: ffff0005ffdc9c80 x12: 0000000000000000
[   19.901477] x11: ffff800009119a38 x10: 4c6ef2e3ba300519 x9 : ffff800000d13844
[   19.901479] x8 : ffff0002a5a33cc8 x7 : 0000000000000030 x6 : 0000000000000030
[   19.901482] x5 : 0000000000000005 x4 : 0000000000000000 x3 : 0000000000000a20
[   19.901484] x2 : 0000000000001080 x1 : ffff80000f66b9d4 x0 : 0000000000001000
[   19.901487] Call trace:
[   19.901488]  page_pool_alloc_frag+0x3c/0x230
[   19.901490]  __otx2_alloc_rbuf+0x60/0xbc [rvu_nicpf]
[   19.901494]  otx2_rq_aura_pool_init+0x1c4/0x240 [rvu_nicpf]
[   19.901498]  otx2_open+0x228/0xa70 [rvu_nicpf]
[   19.901501]  otx2vf_open+0x20/0xd0 [rvu_nicvf]
[   19.901504]  __dev_open+0x114/0x1d0
[   19.901507]  __dev_change_flags+0x194/0x210
[   19.901510]  dev_change_flags+0x2c/0x70
[   19.901512]  devinet_ioctl+0x3a4/0x6c4
[   19.901515]  inet_ioctl+0x228/0x240
[   19.901518]  sock_ioctl+0x2ac/0x480
[   19.901522]  __arm64_sys_ioctl+0x564/0xe50
[   19.901525]  invoke_syscall.constprop.0+0x58/0xf0
[   19.901529]  do_el0_svc+0x58/0x150
[   19.901531]  el0_svc+0x30/0x140
[   19.901533]  el0t_64_sync_handler+0xe8/0x114
[   19.901535]  el0t_64_sync+0x1a0/0x1a4
[   19.901537] ---[ end trace 678c0bf660ad8116 ]---

Fixes: b2e3406a38f0 ("octeontx2-pf: Add support for page pool")
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Link: https://lore.kernel.org/r/20231010034842.3807816-1-rkannoth@marvell.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agonfc: nci: assert requested protocol is valid
Jeremy Cline [Mon, 9 Oct 2023 20:00:54 +0000 (16:00 -0400)]
nfc: nci: assert requested protocol is valid

The protocol is used in a bit mask to determine if the protocol is
supported. Assert the provided protocol is less than the maximum
defined so it doesn't potentially perform a shift-out-of-bounds and
provide a clearer error for undefined protocols vs unsupported ones.

Fixes: 6a2968aaf50c ("NFC: basic NCI protocol implementation")
Reported-and-tested-by: syzbot+0839b78e119aae1fec78@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=0839b78e119aae1fec78
Signed-off-by: Jeremy Cline <jeremy@jcline.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231009200054.82557-1-jeremy@jcline.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agoaf_packet: Fix fortified memcpy() without flex array.
Kuniyuki Iwashima [Mon, 9 Oct 2023 15:31:52 +0000 (08:31 -0700)]
af_packet: Fix fortified memcpy() without flex array.

Sergei Trofimovich reported a regression [0] caused by commit a0ade8404c3b
("af_packet: Fix warning of fortified memcpy() in packet_getname().").

It introduced a flex array sll_addr_flex in struct sockaddr_ll as a
union-ed member with sll_addr to work around the fortified memcpy() check.

However, a userspace program uses a struct that has struct sockaddr_ll in
the middle, where a flex array is illegal to exist.

  include/linux/if_packet.h:24:17: error: flexible array member 'sockaddr_ll::<unnamed union>::<unnamed struct>::sll_addr_flex' not at end of 'struct packet_info_t'
     24 |                 __DECLARE_FLEX_ARRAY(unsigned char, sll_addr_flex);
        |                 ^~~~~~~~~~~~~~~~~~~~

To fix the regression, let's go back to the first attempt [1] telling
memcpy() the actual size of the array.

Reported-by: Sergei Trofimovich <slyich@gmail.com>
Closes: https://github.com/NixOS/nixpkgs/pull/252587#issuecomment-1741733002 [0]
Link: https://lore.kernel.org/netdev/20230720004410.87588-3-kuniyu@amazon.com/
Fixes: a0ade8404c3b ("af_packet: Fix warning of fortified memcpy() in packet_getname().")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20231009153151.75688-1-kuniyu@amazon.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agopinctrl: renesas: rzn1: Enable missing PINMUX
Ralph Siemsen [Wed, 4 Oct 2023 20:00:08 +0000 (16:00 -0400)]
pinctrl: renesas: rzn1: Enable missing PINMUX

Enable pin muxing (eg. programmable function), so that the RZ/N1 GPIO
pins will be configured as specified by the pinmux in the DTS.

This used to be enabled implicitly via CONFIG_GENERIC_PINMUX_FUNCTIONS,
however that was removed, since the RZ/N1 driver does not call any of
the generic pinmux functions.

Fixes: 1308fb4e4eae14e6 ("pinctrl: rzn1: Do not select GENERIC_PIN{CTRL_GROUPS,MUX_FUNCTIONS}")
Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231004200008.1306798-1-ralph.siemsen@linaro.org
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
13 months agonet: tcp: fix crashes trying to free half-baked MTU probes
Jakub Kicinski [Tue, 10 Oct 2023 17:36:51 +0000 (10:36 -0700)]
net: tcp: fix crashes trying to free half-baked MTU probes

tcp_stream_alloc_skb() initializes the skb to use tcp_tsorted_anchor
which is a union with the destructor. We need to clean that
TCP-iness up before freeing.

Fixes: 736013292e3c ("tcp: let tcp_mtu_probe() build headless packets")
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20231010173651.3990234-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoMerge tag 'ieee802154-for-net-2023-10-10' of git://git.kernel.org/pub/scm/linux/kerne...
Jakub Kicinski [Thu, 12 Oct 2023 00:22:15 +0000 (17:22 -0700)]
Merge tag 'ieee802154-for-net-2023-10-10' of git://git./linux/kernel/git/wpan/wpan

Stefan Schmidt says:

====================
pull-request: ieee802154 for net 2023-10-10

Just one small fix this time around.

Dinghao Liu fixed a potential use-after-free in the ca8210 driver probe
function.

* tag 'ieee802154-for-net-2023-10-10' of git://git.kernel.org/pub/scm/linux/kernel/git/wpan/wpan:
  ieee802154: ca8210: Fix a potential UAF in ca8210_probe
====================

Link: https://lore.kernel.org/r/20231010200943.82225-1-stefan@datenfreihafen.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoblock: Don't invalidate pagecache for invalid falloc modes
Sarthak Kukreti [Wed, 11 Oct 2023 20:12:30 +0000 (13:12 -0700)]
block: Don't invalidate pagecache for invalid falloc modes

Only call truncate_bdev_range() if the fallocate mode is supported. This
fixes a bug where data in the pagecache could be invalidated if the
fallocate() was called on the block device with an invalid mode.

Fixes: 25f4c41415e5 ("block: implement (some of) fallocate for block devices")
Cc: stable@vger.kernel.org
Reported-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Sarthak Kukreti <sarthakkukreti@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Fixes: line?  I've never seen those wrapped.
Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
13 months agoMerge tag 'fs_for_v6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack...
Linus Torvalds [Wed, 11 Oct 2023 21:21:15 +0000 (14:21 -0700)]
Merge tag 'fs_for_v6.6-rc6' of git://git./linux/kernel/git/jack/linux-fs

Pull quota regression fix from Jan Kara.

* tag 'fs_for_v6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Fix slow quotaoff

13 months agoMerge tag 'for-6.6-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Wed, 11 Oct 2023 20:58:32 +0000 (13:58 -0700)]
Merge tag 'for-6.6-rc5-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "A revert of recent mount option parsing fix, this breaks mounts with
  security options.

  The second patch is a flexible array annotation"

* tag 'for-6.6-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: add __counted_by for struct btrfs_delayed_item and use struct_size()
  Revert "btrfs: reject unknown mount options early"

13 months agoMerge tag 'ata-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Wed, 11 Oct 2023 20:46:56 +0000 (13:46 -0700)]
Merge tag 'ata-6.6-rc6' of git://git./linux/kernel/git/dlemoal/libata

Pull ata fixes from Damien Le Moal:

 - Three fixes for the pata_parport driver to address a typo in the
   code, a missing operation implementation and port reset handling in
   the presence of slave devices (Ondrej)

 - Fix handling of ATAPI devices reset with the fit3 protocol driver of
   the pata_parport driver (Ondrej)

 - A follow up fix for the recent suspend/resume corrections to avoid
   attempting rescanning on resume the scsi device associated with an
   ata disk when the request queue of the scsi device is still suspended
   (in addition to not doing the rescan if the scsi device itself is
   still suspended) (me)

* tag 'ata-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  scsi: Do not rescan devices with a suspended queue
  ata: pata_parport: fit3: implement IDE command set registers
  ata: pata_parport: add custom version of wait_after_reset
  ata: pata_parport: implement set_devctl
  ata: pata_parport: fix pata_parport_devchk

13 months agoMerge tag 'for-linus-2023101101' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 11 Oct 2023 20:27:44 +0000 (13:27 -0700)]
Merge tag 'for-linus-2023101101' of git://git./linux/kernel/git/hid/hid

Pull HID fixes from Benjamin Tissoires:

 - regression fix for i2c-hid when used on DT platforms (Johan Hovold)

 - kernel crash fix on removal of the Logitech USB receiver (Hans de
   Goede)

* tag 'for-linus-2023101101' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
  HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
  HID: i2c-hid: fix handling of unpopulated devices

13 months agoMerge tag 'printk-for-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/print...
Linus Torvalds [Wed, 11 Oct 2023 20:15:16 +0000 (13:15 -0700)]
Merge tag 'printk-for-6.6-rc6' of git://git./linux/kernel/git/printk/linux

Pull printk regression fix from Petr Mladek:

 - Avoid unnecessary wait and try to flush messages before checking
   pending ones

* tag 'printk-for-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  printk: flush consoles before checking progress

13 months agomedia: i2c: ov8858: Don't set fwnode in the driver
Ondrej Jirman [Tue, 10 Oct 2023 07:07:44 +0000 (09:07 +0200)]
media: i2c: ov8858: Don't set fwnode in the driver

This makes the driver work with the new check in
v4l2_async_register_subdev() that was introduced recently in 6.6-rc1.
Without this change, probe fails with:

ov8858 1-0036: Detected OV8858 sensor, revision 0xb2
ov8858 1-0036: sub-device fwnode is an endpoint!
ov8858 1-0036: v4l2 async register subdev failed
ov8858: probe of 1-0036 failed with error -22

This also simplifies the driver a bit.

Signed-off-by: Ondrej Jirman <megi@xff.cz>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
13 months agomedia: ipu-bridge: Add missing acpi_dev_put() in ipu_bridge_get_ivsc_acpi_dev()
Geert Uytterhoeven [Fri, 29 Sep 2023 09:31:33 +0000 (11:31 +0200)]
media: ipu-bridge: Add missing acpi_dev_put() in ipu_bridge_get_ivsc_acpi_dev()

In ipu_bridge_get_ivsc_acpi_dev(), the "ivsc_adev" acpi_device pointer
from the outer loop is handed over to the caller, which takes proper
care of its reference count.
However, the "consumer" acpi_device pointer from the inner loop is lost,
without decrementing its reference count.

Fix this by adding the missing call to acpi_dev_put().

Fixes: c66821f381ae ("media: pci: intel: Add IVSC support for IPU bridge driver")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
13 months agomedia: xilinx-vipp: Look for entities also in waiting_list
Sakari Ailus [Fri, 29 Sep 2023 06:31:08 +0000 (09:31 +0300)]
media: xilinx-vipp: Look for entities also in waiting_list

The big V4L2 async framework overhaul simplified linked lists used by the
V4L2 async framework. This affected a few drivers and it turns out a few
of those drivers rely on searching for entities in both async notifier's
waiting and done lists. Do that by separately traversing both.

Fixes: 9bf19fbf0c8b ("media: v4l: async: Rework internal lists")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
13 months agomedia: subdev: Don't report V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled
Hans de Goede [Tue, 10 Oct 2023 10:24:58 +0000 (12:24 +0200)]
media: subdev: Don't report V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled

Since the stream API is still experimental it is currently locked away
behind the internal, default disabled, v4l2_subdev_enable_streams_api flag.

Advertising V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled
confuses userspace. E.g. it causes the following libcamera error:

ERROR SimplePipeline simple.cpp:1497 Failed to reset routes for
  /dev/v4l-subdev1: Inappropriate ioctl for device

Don't report V4L2_SUBDEV_CAP_STREAMS when the streams API is disabled
to avoid problems like this.

Reported-by: Dennis Bonke <admin@dennisbonke.com>
Fixes: 9a6b5bf4c1bb ("media: add V4L2_SUBDEV_CAP_STREAMS")
Cc: stable@vger.kernel.org # for >= 6.3
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
13 months agoMerge branch 'rework/misc-cleanups' into for-linus
Petr Mladek [Wed, 11 Oct 2023 10:58:14 +0000 (12:58 +0200)]
Merge branch 'rework/misc-cleanups' into for-linus

13 months agobtrfs: add __counted_by for struct btrfs_delayed_item and use struct_size()
Gustavo A. R. Silva [Mon, 9 Oct 2023 20:44:54 +0000 (14:44 -0600)]
btrfs: add __counted_by for struct btrfs_delayed_item and use struct_size()

Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time via CONFIG_UBSAN_BOUNDS (for
array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).

While there, use struct_size() helper, instead of the open-coded
version, to calculate the size for the allocation of the whole
flexible structure, including of course, the flexible-array member.

This code was found with the help of Coccinelle, and audited and
fixed manually.

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
13 months agonet/smc: Fix pos miscalculation in statistics
Nils Hoppmann [Mon, 9 Oct 2023 14:40:48 +0000 (16:40 +0200)]
net/smc: Fix pos miscalculation in statistics

SMC_STAT_PAYLOAD_SUB(_smc_stats, _tech, key, _len, _rc) will calculate
wrong bucket positions for payloads of exactly 4096 bytes and
(1 << (m + 12)) bytes, with m == SMC_BUF_MAX - 1.

Intended bucket distribution:
Assume l == size of payload, m == SMC_BUF_MAX - 1.

Bucket 0                : 0 < l <= 2^13
Bucket n, 1 <= n <= m-1 : 2^(n+12) < l <= 2^(n+13)
Bucket m                : l > 2^(m+12)

Current solution:
_pos = fls64((l) >> 13)
[...]
_pos = (_pos < m) ? ((l == 1 << (_pos + 12)) ? _pos - 1 : _pos) : m

For l == 4096, _pos == -1, but should be _pos == 0.
For l == (1 << (m + 12)), _pos == m, but should be _pos == m - 1.

In order to avoid special treatment of these corner cases, the
calculation is adjusted. The new solution first subtracts the length by
one, and then calculates the correct bucket by shifting accordingly,
i.e. _pos = fls64((l - 1) >> 13), l > 0.
This not only fixes the issues named above, but also makes the whole
bucket assignment easier to follow.

Same is done for SMC_STAT_RMB_SIZE_SUB(_smc_stats, _tech, k, _len),
where the calculation of the bucket position is similar to the one
named above.

Fixes: e0e4b8fa5338 ("net/smc: Add SMC statistics support")
Suggested-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Nils Hoppmann <niho@linux.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 months agonfp: flower: avoid rmmod nfp crash issues
Yanguo Li [Mon, 9 Oct 2023 11:21:55 +0000 (13:21 +0200)]
nfp: flower: avoid rmmod nfp crash issues

When there are CT table entries, and you rmmod nfp, the following
events can happen:

task1:
    nfp_net_pci_remove
          ↓
    nfp_flower_stop->(asynchronous)tcf_ct_flow_table_cleanup_work(3)
          ↓
    nfp_zone_table_entry_destroy(1)

task2:
    nfp_fl_ct_handle_nft_flow(2)

When the execution order is (1)->(2)->(3), it will crash. Therefore, in
the function nfp_fl_ct_del_flow, nf_flow_table_offload_del_cb needs to
be executed synchronously.

At the same time, in order to solve the deadlock problem and the problem
of rtnl_lock sometimes failing, replace rtnl_lock with the private
nfp_fl_lock.

Fixes: 7cc93d888df7 ("nfp: flower-ct: remove callback delete deadlock")
Cc: stable@vger.kernel.org
Signed-off-by: Yanguo Li <yanguo.li@corigine.com>
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 months agonet: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read
Javier Carrasco [Mon, 9 Oct 2023 22:26:14 +0000 (00:26 +0200)]
net: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read

syzbot has found an uninit-value bug triggered by the dm9601 driver [1].

This error happens because the variable res is not updated if the call
to dm_read_shared_word returns an error. In this particular case -EPROTO
was returned and res stayed uninitialized.

This can be avoided by checking the return value of dm_read_shared_word
and propagating the error if the read operation failed.

[1] https://syzkaller.appspot.com/bug?extid=1f53a30781af65d2c955

Cc: stable@vger.kernel.org
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Reported-and-tested-by: syzbot+1f53a30781af65d2c955@syzkaller.appspotmail.com
Acked-by: Peter Korsgaard <peter@korsgaard.com>
Fixes: d0374f4f9c35cdfbee0 ("USB: Davicom DM9601 usbnet driver")
Link: https://lore.kernel.org/r/20231009-topic-dm9601_uninit_mdio_read-v2-1-f2fe39739b6c@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoMerge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Jakub Kicinski [Wed, 11 Oct 2023 02:59:49 +0000 (19:59 -0700)]
Merge tag 'for-netdev' of https://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2023-10-11

We've added 14 non-merge commits during the last 5 day(s) which contain
a total of 12 files changed, 398 insertions(+), 104 deletions(-).

The main changes are:

1) Fix s390 JIT backchain issues in the trampoline code generation which
   previously clobbered the caller's backchain, from Ilya Leoshkevich.

2) Fix zero-size allocation warning in xsk sockets when the configured
   ring size was close to SIZE_MAX, from Andrew Kanner.

3) Fixes for bpf_mprog API that were found when implementing support
   in the ebpf-go library along with selftests, from Daniel Borkmann
   and Lorenz Bauer.

4) Fix riscv JIT to properly sign-extend the return register in programs.
   This fixes various test_progs selftests on riscv, from Björn Töpel.

5) Fix verifier log for async callback return values where the allowed
   range was displayed incorrectly, from David Vernet.

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  s390/bpf: Fix unwinding past the trampoline
  s390/bpf: Fix clobbering the caller's backchain in the trampoline
  selftests/bpf: Add testcase for async callback return value failure
  bpf: Fix verifier log for async callback return values
  xdp: Fix zero-size allocation warning in xskq_create()
  riscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values
  riscv, bpf: Sign-extend return values
  selftests/bpf: Make seen_tc* variable tests more robust
  selftests/bpf: Test query on empty mprog and pass revision into attach
  selftests/bpf: Adapt assert_mprog_count to always expect 0 count
  selftests/bpf: Test bpf_mprog query API via libbpf and raw syscall
  bpf: Refuse unused attributes in bpf_prog_{attach,detach}
  bpf: Handle bpf_mprog_query with NULL entry
  bpf: Fix BPF_PROG_QUERY last field check
====================

Link: https://lore.kernel.org/r/20231010223610.3984-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoethtool: Fix mod state of verbose no_mask bitset
Kory Maincent [Mon, 9 Oct 2023 13:36:45 +0000 (15:36 +0200)]
ethtool: Fix mod state of verbose no_mask bitset

A bitset without mask in a _SET request means we want exactly the bits in
the bitset to be set. This works correctly for compact format but when
verbose format is parsed, ethnl_update_bitset32_verbose() only sets the
bits present in the request bitset but does not clear the rest. The commit
6699170376ab fixes this issue by clearing the whole target bitmap before we
start iterating. The solution proposed brought an issue with the behavior
of the mod variable. As the bitset is always cleared the old val will
always differ to the new val.

Fix it by adding a new temporary variable which save the state of the old
bitmap.

Fixes: 6699170376ab ("ethtool: fix application of verbose no_mask bitset")
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231009133645.44503-1-kory.maincent@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agoMerge tag 'linux-can-fixes-for-6.6-20231009' of git://git.kernel.org/pub/scm/linux...
Jakub Kicinski [Wed, 11 Oct 2023 02:45:59 +0000 (19:45 -0700)]
Merge tag 'linux-can-fixes-for-6.6-20231009' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2023-10-09

Lukas Magel's patch for the CAN ISO-TP protocol fixes the TX state
detection and wait behavior.

John Watts contributes a patch to only show the sun4i_can Kconfig
option on ARCH_SUNXI.

A patch by Miquel Raynal fixes the soft-reset workaround for Renesas
SoCs in the sja1000 driver.

Markus Schneider-Pargmann's patch for the tcan4x5x m_can glue driver
fixes the id2 register for the tcan4553.

2 patches by Haibo Chen fix the flexcan stop mode for the imx93 SoC.

* tag 'linux-can-fixes-for-6.6-20231009' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can:
  can: tcan4x5x: Fix id2_register for tcan4553
  can: flexcan: remove the auto stop mode for IMX93
  can: sja1000: Always restart the Tx queue after an overrun
  arm64: dts: imx93: add the Flex-CAN stop mode by GPR
  can: sun4i_can: Only show Kconfig if ARCH_SUNXI is set
  can: isotp: isotp_sendmsg(): fix TX state detection and wait behavior
====================

Link: https://lore.kernel.org/r/20231009085256.693378-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agonet: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()
Eric Dumazet [Mon, 9 Oct 2023 12:31:10 +0000 (12:31 +0000)]
net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

Sili Luo reported a race in nfc_llcp_sock_get(), leading to UAF.

Getting a reference on the socket found in a lookup while
holding a lock should happen before releasing the lock.

nfc_llcp_sock_get_sn() has a similar problem.

Finally nfc_llcp_recv_snl() needs to make sure the socket
found by nfc_llcp_sock_from_sn() does not disappear.

Fixes: 8f50020ed9b8 ("NFC: LLCP late binding")
Reported-by: Sili Luo <rootlab@huawei.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231009123110.3735515-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agomctp: perform route lookups under a RCU read-side lock
Jeremy Kerr [Mon, 9 Oct 2023 07:56:45 +0000 (15:56 +0800)]
mctp: perform route lookups under a RCU read-side lock

Our current route lookups (mctp_route_lookup and mctp_route_lookup_null)
traverse the net's route list without the RCU read lock held. This means
the route lookup is subject to preemption, resulting in an potential
grace period expiry, and so an eventual kfree() while we still have the
route pointer.

Add the proper read-side critical section locks around the route
lookups, preventing premption and a possible parallel kfree.

The remaining net->mctp.routes accesses are already under a
rcu_read_lock, or protected by the RTNL for updates.

Based on an analysis from Sili Luo <rootlab@huawei.com>, where
introducing a delay in the route lookup could cause a UAF on
simultaneous sendmsg() and route deletion.

Reported-by: Sili Luo <rootlab@huawei.com>
Fixes: 889b7da23abf ("mctp: Add initial routing framework")
Cc: stable@vger.kernel.org
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/29c4b0e67dc1bf3571df3982de87df90cae9b631.1696837310.git.jk@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agonet: skbuff: fix kernel-doc typos
Randy Dunlap [Sun, 8 Oct 2023 21:41:21 +0000 (14:41 -0700)]
net: skbuff: fix kernel-doc typos

Correct punctuation and drop an extraneous word.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231008214121.25940-1-rdunlap@infradead.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agos390/bpf: Fix unwinding past the trampoline
Ilya Leoshkevich [Tue, 10 Oct 2023 20:20:10 +0000 (22:20 +0200)]
s390/bpf: Fix unwinding past the trampoline

When functions called by the trampoline panic, the backtrace that is
printed stops at the trampoline, because the trampoline does not store
its caller's frame address (backchain) on stack; it also stores the
return address at a wrong location.

Store both the same way as is already done for the regular eBPF programs.

Fixes: 528eb2cb87bc ("s390/bpf: Implement arch_prepare_bpf_trampoline()")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231010203512.385819-3-iii@linux.ibm.com
13 months agos390/bpf: Fix clobbering the caller's backchain in the trampoline
Ilya Leoshkevich [Tue, 10 Oct 2023 20:20:09 +0000 (22:20 +0200)]
s390/bpf: Fix clobbering the caller's backchain in the trampoline

One of the first things that s390x kernel functions do is storing the
the caller's frame address (backchain) on stack. This makes unwinding
possible. The backchain is always stored at frame offset 152, which is
inside the 160-byte stack area, that the functions allocate for their
callees. The callees must preserve the backchain; the remaining 152
bytes they may use as they please.

Currently the trampoline uses all 160 bytes, clobbering the backchain.
This causes kernel panics when using __builtin_return_address() in
functions called by the trampoline.

Fix by reducing the usage of the caller-reserved stack area by 8 bytes
in the trampoline.

Fixes: 528eb2cb87bc ("s390/bpf: Implement arch_prepare_bpf_trampoline()")
Reported-by: Song Liu <song@kernel.org>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231010203512.385819-2-iii@linux.ibm.com
13 months agoMerge tag 'xsa441-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Linus Torvalds [Tue, 10 Oct 2023 18:31:42 +0000 (11:31 -0700)]
Merge tag 'xsa441-6.6-tag' of git://git./linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "A fix for the xen events driver:

  Closing of an event channel in the Linux kernel can result in a
  deadlock. This happens when the close is being performed in parallel
  to an unrelated Xen console action and the handling of a Xen console
  interrupt in an unprivileged guest.

  The closing of an event channel is e.g. triggered by removal of a
  paravirtual device on the other side. As this action will cause
  console messages to be issued on the other side quite often, the
  chance of triggering the deadlock is not negligible"

* tag 'xsa441-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/events: replace evtchn_rwlock with RCU

13 months agoKEYS: trusted: Remove redundant static calls usage
Sumit Garg [Fri, 6 Oct 2023 05:18:01 +0000 (10:48 +0530)]
KEYS: trusted: Remove redundant static calls usage

Static calls invocations aren't well supported from module __init and
__exit functions. Especially the static call from cleanup_trusted() led
to a crash on x86 kernel with CONFIG_DEBUG_VIRTUAL=y.

However, the usage of static call invocations for trusted_key_init()
and trusted_key_exit() don't add any value from either a performance or
security perspective. Hence switch to use indirect function calls instead.

Note here that although it will fix the current crash report, ultimately
the static call infrastructure should be fixed to either support its
future usage from module __init and __exit functions or not.

Reported-and-tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Link: https://lore.kernel.org/lkml/ZRhKq6e5nF%2F4ZIV1@fedora/#t
Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework")
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 months agoMerge tag 'irq-urgent-2023-10-10-v2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 10 Oct 2023 18:14:07 +0000 (11:14 -0700)]
Merge tag 'irq-urgent-2023-10-10-v2' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "A set of updates for interrupt chip drivers:

   - Fix the fail of the Qualcomm PDC driver on v3.2 hardware which is
     caused by a control bit being moved to a different location

   - Update the SM8150 device tree PDC resource so the version register
     can be read

   - Make the Renesas RZG2L driver correct for interrupts which are
     outside of the LSB in the TSSR register by using the proper macro
     for calculating the mask

   - Document the Renesas RZ2GL device tree binding correctly and update
     them for a few devices which faul to boot otherwise

   - Use the proper accessor in the RZ2GL driver instead of blindly
     dereferencing an unchecked pointer

   - Make GICv3 handle the dma-non-coherent attribute correctly

   - Ensure that all interrupt controller nodes on RISCV are marked as
     initialized correctly

  Maintainer changes:

   - Add a new entry for GIC interrupt controllers and assign Marc
     Zyngier as the maintainer

   - Remove Marc Zyngier from the core and driver maintainer entries as
     he is burried in work and short of time to handle that.

  Thanks to Marc for all the great work he has done in the past couple
  of years!

  Also note that commit 5873d380f4c0 ("irqchip/qcom-pdc: Add support for
  v3.2 HW") has a incorrect SOB chain.

  The real author is Neil. His patch was posted by Dmitry once and Neil
  picked it up from the list and reposted it with the bogus SOB chain.

  Not a big deal, but worth to mention. I wanted to fix that up, but
  then got distracted and Marc piled more changes on top. So I decided
  to leave it as is instead of rebasing world"

* tag 'irq-urgent-2023-10-10-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Remove myself from the general IRQ subsystem maintenance
  MAINTAINERS: Add myself as the ARM GIC maintainer
  irqchip/renesas-rzg2l: Convert to irq_data_get_irq_chip_data()
  irqchip/stm32-exti: add missing DT IRQ flag translation
  irqchip/riscv-intc: Mark all INTC nodes as initialized
  irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing
  irqchip/gic-v3-its: Split allocation from initialisation of its_node
  dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property
  dt-bindings: interrupt-controller: renesas,irqc: Add r8a779f0 support
  dt-bindings: interrupt-controller: renesas,rzg2l-irqc: Document RZ/G2UL SoC
  irqchip: renesas-rzg2l: Fix logic to clear TINT interrupt source
  dt-bindings: interrupt-controller: renesas,rzg2l-irqc: Update description for '#interrupt-cells' property
  arm64: dts: qcom: sm8150: extend the size of the PDC resource
  irqchip/qcom-pdc: Add support for v3.2 HW

13 months agoMerge tag 'hyperv-fixes-signed-20231009' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 10 Oct 2023 18:01:21 +0000 (11:01 -0700)]
Merge tag 'hyperv-fixes-signed-20231009' of git://git./linux/kernel/git/hyperv/linux

Pull hyperv fixes from Wei Liu:

 - fixes for Hyper-V VTL code (Saurabh Sengar and Olaf Hering)

 - fix hv_kvp_daemon to support keyfile based connection profile
   (Shradha Gupta)

* tag 'hyperv-fixes-signed-20231009' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  hv/hv_kvp_daemon:Support for keyfile based connection profile
  hyperv: reduce size of ms_hyperv_info
  x86/hyperv: Add common print prefix "Hyper-V" in hv_init
  x86/hyperv: Remove hv_vtl_early_init initcall
  x86/hyperv: Restrict get_vtl to only VTL platforms

13 months agoMerge tag 'v6.6-p4' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Tue, 10 Oct 2023 17:47:35 +0000 (10:47 -0700)]
Merge tag 'v6.6-p4' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "Fix a regression in dm-crypt"

* tag 'v6.6-p4' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  dm crypt: Fix reqsize in crypt_iv_eboiv_gen

13 months agoMerge tag 'sound-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Tue, 10 Oct 2023 17:33:21 +0000 (10:33 -0700)]
Merge tag 'sound-6.6-rc6' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of pending fixes since a couple of weeks ago, which
  became slightly bigger than usual due to my vacation.

  Most of changes are about ASoC device-specific fixes while USB- and
  HD-audio received quirks as usual. All fixes, including two ASoC core
  changes, are reasonably small and safe to apply"

* tag 'sound-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (23 commits)
  ALSA: usb-audio: Fix microphone sound on Nexigo webcam.
  ALSA: hda/realtek: Change model for Intel RVP board
  ALSA: usb-audio: Fix microphone sound on Opencomm2 Headset
  ALSA: hda: cs35l41: Cleanup and fix double free in firmware request
  ASoC: dt-bindings: fsl,micfil: Document #sound-dai-cells
  ASoC: amd: yc: Fix non-functional mic on Lenovo 82YM
  ASoC: tlv320adc3xxx: BUG: Correct micbias setting
  ASoC: rt5682: Fix regulator enable/disable sequence
  ASoC: hdmi-codec: Fix broken channel map reporting
  ASoC: core: Do not call link_exit() on uninitialized rtd objects
  ASoC: core: Print component name when printing log
  ASoC: SOF: amd: fix for firmware reload failure after playback
  ASoC: fsl-asoc-card: use integer type for fll_id and pll_id
  ASoC: fsl_sai: Don't disable bitclock for i.MX8MP
  dt-bindings: ASoC: rockchip: Add compatible for RK3128 spdif
  ASoC: soc-generic-dmaengine-pcm: Fix function name in comment
  ALSA: hda/realtek - ALC287 merge RTK codec with CS CS35L41 AMP
  ASoC: simple-card: fixup asoc_simple_probe() error handling
  ASoC: simple-card-utils: fixup simple_util_startup() error handling
  ASoC: Intel: sof_sdw: add support for SKU 0B14
  ...

13 months agoRevert "btrfs: reject unknown mount options early"
David Sterba [Tue, 10 Oct 2023 13:27:56 +0000 (15:27 +0200)]
Revert "btrfs: reject unknown mount options early"

This reverts commit 5f521494cc73520ffac18ede0758883b9aedd018.

The patch breaks mounts with security mount options like

  $ mount -o context=system_u:object_r:root_t:s0 /dev/sdX /mn
  mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdX, missing codepage or helper program, ...

We cannot reject all unknown options in btrfs_parse_subvol_options() as
intended, the security options can be present at this point and it's not
possible to enumerate them in a future proof way. This means unknown
mount options are silently accepted like before when the filesystem is
mounted with either -o subvol=/path or as followup mounts of the same
device.

Reported-by: Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com
Signed-off-by: David Sterba <dsterba@suse.com>
13 months agonet/mlx5e: Again mutually exclude RX-FCS and RX-port-timestamp
Will Mortensen [Fri, 6 Oct 2023 05:37:06 +0000 (22:37 -0700)]
net/mlx5e: Again mutually exclude RX-FCS and RX-port-timestamp

Commit 1e66220948df8 ("net/mlx5e: Update rx ring hw mtu upon each rx-fcs
flag change") seems to have accidentally inverted the logic added in
commit 0bc73ad46a76 ("net/mlx5e: Mutually exclude RX-FCS and
RX-port-timestamp").

The impact of this is a little unclear since it seems the FCS scattered
with RX-FCS is (usually?) correct regardless.

Fixes: 1e66220948df8 ("net/mlx5e: Update rx ring hw mtu upon each rx-fcs flag change")
Tested-by: Charlotte Tan <charlotte@extrahop.com>
Reviewed-by: Charlotte Tan <charlotte@extrahop.com>
Cc: Adham Faris <afaris@nvidia.com>
Cc: Aya Levin <ayal@nvidia.com>
Cc: Tariq Toukan <tariqt@nvidia.com>
Cc: Moshe Shemesh <moshe@nvidia.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Will Mortensen <will@extrahop.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20231006053706.514618-1-will@extrahop.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agodrm/atomic-helper: relax unregistered connector check
Simon Ser [Thu, 5 Oct 2023 13:16:32 +0000 (13:16 +0000)]
drm/atomic-helper: relax unregistered connector check

The driver might pull connectors which weren't submitted by
user-space into the atomic state. For instance,
intel_dp_mst_atomic_master_trans_check() pulls in connectors
sharing the same DP-MST stream. However, if the connector is
unregistered, this later fails with:

    [  559.425658] i915 0000:00:02.0: [drm:drm_atomic_helper_check_modeset] [CONNECTOR:378:DP-7] is not registered

Skip the unregistered connector check to allow user-space to turn
off connectors one-by-one.

See this wlroots issue:
https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3407

Previous discussion:
https://lore.kernel.org/intel-gfx/Y6GX7z17WmDSKwta@ideak-desk.fi.intel.com/

Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: stable@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231005131623.114379-1-contact@emersion.fr
13 months agonet/smc: Fix dependency of SMC on ISM
Gerd Bayer [Fri, 6 Oct 2023 12:58:47 +0000 (14:58 +0200)]
net/smc: Fix dependency of SMC on ISM

When the SMC protocol is built into the kernel proper while ISM is
configured to be built as module, linking the kernel fails due to
unresolved dependencies out of net/smc/smc_ism.o to
ism_get_smcd_ops, ism_register_client, and ism_unregister_client
as reported via the linux-next test automation (see link).
This however is a bug introduced a while ago.

Correct the dependency list in ISM's and SMC's Kconfig to reflect the
dependencies that are actually inverted. With this you cannot build a
kernel with CONFIG_SMC=y and CONFIG_ISM=m. Either ISM needs to be 'y',
too - or a 'n'. That way, SMC can still be configured on non-s390
architectures that do not have (nor need) an ISM driver.

Fixes: 89e7d2ba61b7 ("net/ism: Add new API for client registration")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Closes: https://lore.kernel.org/linux-next/d53b5b50-d894-4df8-8969-fd39e63440ae@infradead.org/
Co-developed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Simon Horman <horms@kernel.org> # build-tested
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Link: https://lore.kernel.org/r/20231006125847.1517840-1-gbayer@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agoixgbe: fix crash with empty VF macvlan list
Dan Carpenter [Fri, 6 Oct 2023 12:53:09 +0000 (15:53 +0300)]
ixgbe: fix crash with empty VF macvlan list

The adapter->vf_mvs.l list needs to be initialized even if the list is
empty.  Otherwise it will lead to crashes.

Fixes: a1cbb15c1397 ("ixgbe: Add macvlan support for VF")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Link: https://lore.kernel.org/r/ZSADNdIw8zFx1xw2@kadam
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agodrm/panel: boe-tv101wum-nl6: Completely pull GPW to VGL before TP term
Ruihai Zhou [Sat, 7 Oct 2023 06:49:49 +0000 (14:49 +0800)]
drm/panel: boe-tv101wum-nl6: Completely pull GPW to VGL before TP term

The sta_himax83102 panel sometimes shows abnormally flickering
horizontal lines. The front gate output will precharge the X point of
the next pole circuit before TP(TouchPanel Enable) term starts, and wait
until the end of the TP term to resume the CLK. For this reason, the X
point must be maintained during the TP term. In abnormal case, we
measured a slight leakage at point X. This because during the TP term,
the GPW does not fully pull the VGL low, causing the TFT to not be
closed tightly.

To fix this, we completely pull GPW to VGL before entering the TP term.
This will ensure that the TFT is closed tightly and prevent the abnormal
display.

Fixes: 1bc2ef065f13 ("drm/panel: Support for Starry-himax83102-j02 TDDI MIPI-DSI panel")
Signed-off-by: Ruihai Zhou <zhouruihai@huaqin.corp-partner.google.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20231007064949.22668-1-zhouruihai@huaqin.corp-partner.google.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231007064949.22668-1-zhouruihai@huaqin.corp-partner.google.com
13 months agoMerge branch 'add-update_pn-flag'
Paolo Abeni [Tue, 10 Oct 2023 08:30:33 +0000 (10:30 +0200)]
Merge branch 'add-update_pn-flag'

Radu Pirea says:

====================
Add update_pn flag

Patches extracted from
https://lore.kernel.org/all/20230928084430.1882670-1-radu-nicolae.pirea@oss.nxp.com/
Update_pn flag will let the offloaded MACsec implementations to know when
the PN is updated.
====================

Link: https://lore.kernel.org/r/20231005180636.672791-1-radu-nicolae.pirea@oss.nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agonet/mlx5e: macsec: use update_pn flag instead of PN comparation
Radu Pirea (NXP OSS) [Thu, 5 Oct 2023 18:06:36 +0000 (21:06 +0300)]
net/mlx5e: macsec: use update_pn flag instead of PN comparation

When updating the SA, use the new update_pn flags instead of comparing the
new PN with the initial one.

Comparing the initial PN value with the new value will allow the user
to update the SA using the initial PN value as a parameter like this:
$ ip macsec add macsec0 tx sa 0 pn 1 on key 00 \
ead3664f508eb06c40ac7104cdae4ce5
$ ip macsec set macsec0 tx sa 0 pn 1 off

Fixes: 8ff0ac5be144 ("net/mlx5: Add MACsec offload Tx command support")
Fixes: aae3454e4d4c ("net/mlx5e: Add MACsec offload Rx command support")
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agonet: phy: mscc: macsec: reject PN update requests
Radu Pirea (NXP OSS) [Thu, 5 Oct 2023 18:06:35 +0000 (21:06 +0300)]
net: phy: mscc: macsec: reject PN update requests

Updating the PN is not supported.
Return -EINVAL if update_pn is true.

The following command succeeded, but it should fail because the driver
does not update the PN:
ip macsec set macsec0 tx sa 0 pn 232 on

Fixes: 28c5107aa904 ("net: phy: mscc: macsec support")
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agoocteontx2-pf: mcs: update PN only when update_pn is true
Radu Pirea (NXP OSS) [Thu, 5 Oct 2023 18:06:34 +0000 (21:06 +0300)]
octeontx2-pf: mcs: update PN only when update_pn is true

When updating SA, update the PN only when the update_pn flag is true.
Otherwise, the PN will be reset to its previous value using the
following command and this should not happen:
$ ip macsec set macsec0 tx sa 0 on

Fixes: c54ffc73601c ("octeontx2-pf: mcs: Introduce MACSEC hardware offloading")
Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agonet: macsec: indicate next pn update when offloading
Radu Pirea (NXP OSS) [Thu, 5 Oct 2023 18:06:33 +0000 (21:06 +0300)]
net: macsec: indicate next pn update when offloading

Indicate next PN update using update_pn flag in macsec_context.
Offloaded MACsec implementations does not know whether or not the
MACSEC_SA_ATTR_PN attribute was passed for an SA update and assume
that next PN should always updated, but this is not always true.

The PN can be reset to its initial value using the following command:
$ ip macsec set macsec0 tx sa 0 off #octeontx2-pf case

Or, the update PN command will succeed even if the driver does not support
PN updates.
$ ip macsec set macsec0 tx sa 0 pn 1 on #mscc phy driver case

Comparing the initial PN with the new PN value is not a solution. When
the user updates the PN using its initial value the command will
succeed, even if the driver does not support it. Like this:
$ ip macsec add macsec0 tx sa 0 pn 1 on key 00 \
ead3664f508eb06c40ac7104cdae4ce5
$ ip macsec set macsec0 tx sa 0 pn 1 on #mlx5 case

Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
13 months agoscsi: Do not rescan devices with a suspended queue
Damien Le Moal [Wed, 4 Oct 2023 08:50:49 +0000 (17:50 +0900)]
scsi: Do not rescan devices with a suspended queue

Commit ff48b37802e5 ("scsi: Do not attempt to rescan suspended devices")
modified scsi_rescan_device() to avoid attempting rescanning a suspended
device. However, the modification added a check to verify that a SCSI
device is in the running state without checking if the device request
queue (in the case of block device) is also running, thus allowing the
exectuion of internal requests. Without checking the device request
queue, commit ff48b37802e5 fix is incomplete and deadlocks on resume can
still happen. Use blk_queue_pm_only() to check if the device request
queue allows executing commands in addition to checking the SCSI device
state.

Reported-by: Petr Tesarik <petr@tesarici.cz>
Fixes: ff48b37802e5 ("scsi: Do not attempt to rescan suspended devices")
Cc: stable@vger.kernel.org
Tested-by: Petr Tesarik <petr@tesarici.cz>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
13 months agoata: pata_parport: fit3: implement IDE command set registers
Ondrej Zary [Thu, 5 Oct 2023 20:55:59 +0000 (22:55 +0200)]
ata: pata_parport: fit3: implement IDE command set registers

fit3 protocol driver does not support accessing IDE control registers
(device control/altstatus). The DOS driver does not use these registers
either (as observed from DOSEMU trace). But the HW seems to be capable
of accessing these registers - I simply tried bit 3 and it works!

The control register is required to properly reset ATAPI devices or
they will be detected only once (after a power cycle).

Tested with EXP Computer CD-865 with MC-1285B EPP cable and
TransDisk 3000.

Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
13 months agoata: pata_parport: add custom version of wait_after_reset
Ondrej Zary [Thu, 5 Oct 2023 20:55:58 +0000 (22:55 +0200)]
ata: pata_parport: add custom version of wait_after_reset

Some parallel adapters (e.g. EXP Computer MC-1285B EPP Cable) return
bogus values when there's no master device present. This can cause
reset to fail, preventing the lone slave device (such as EXP Computer
CD-865) from working.

Add custom version of wait_after_reset that ignores master failure when
a slave device is present. The custom version is also needed because
the generic ata_sff_wait_after_reset uses direct port I/O for slave
device detection.

Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
13 months agoata: pata_parport: implement set_devctl
Ondrej Zary [Thu, 5 Oct 2023 20:55:57 +0000 (22:55 +0200)]
ata: pata_parport: implement set_devctl

Add missing ops->sff_set_devctl implementation.

Fixes: 246a1c4c6b7f ("ata: pata_parport: add driver (PARIDE replacement)")
Cc: stable@vger.kernel.org
Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
13 months agoata: pata_parport: fix pata_parport_devchk
Ondrej Zary [Thu, 5 Oct 2023 20:55:56 +0000 (22:55 +0200)]
ata: pata_parport: fix pata_parport_devchk

There's a 'x' missing in 0x55 in pata_parport_devchk(), causing the
detection to always fail. Fix it.

Fixes: 246a1c4c6b7f ("ata: pata_parport: add driver (PARIDE replacement)")
Cc: stable@vger.kernel.org
Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
13 months agohv/hv_kvp_daemon:Support for keyfile based connection profile
Shradha Gupta [Mon, 9 Oct 2023 10:38:40 +0000 (03:38 -0700)]
hv/hv_kvp_daemon:Support for keyfile based connection profile

Ifcfg config file support in NetworkManger is deprecated. This patch
provides support for the new keyfile config format for connection
profiles in NetworkManager. The patch modifies the hv_kvp_daemon code
to generate the new network configuration in keyfile
format(.ini-style format) along with a ifcfg format configuration.
The ifcfg format configuration is also retained to support easy
backward compatibility for distro vendors. These configurations are
stored in temp files which are further translated using the
hv_set_ifconfig.sh script. This script is implemented by individual
distros based on the network management commands supported.
For example, RHEL's implementation could be found here:
https://gitlab.com/redhat/centos-stream/src/hyperv-daemons/-/blob/c9s/hv_set_ifconfig.sh
Debian's implementation could be found here:
https://github.com/endlessm/linux/blob/master/debian/cloud-tools/hv_set_ifconfig

The next part of this support is to let the Distro vendors consume
these modified implementations to the new configuration format.

Tested-on: Rhel9(Hyper-V, Azure)(nm and ifcfg files verified)
Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Reviewed-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Link: https://lore.kernel.org/r/1696847920-31125-1-git-send-email-shradhagupta@linux.microsoft.com
13 months agonet: refine debug info in skb_checksum_help()
Eric Dumazet [Fri, 6 Oct 2023 17:33:54 +0000 (17:33 +0000)]
net: refine debug info in skb_checksum_help()

syzbot uses panic_on_warn.

This means that the skb_dump() I added in the blamed commit are
not even called.

Rewrite this so that we get the needed skb dump before syzbot crashes.

Fixes: eeee4b77dc52 ("net: add more debug info in skb_checksum_help()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20231006173355.2254983-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
13 months agodrm/amdgpu: fix SI failure due to doorbells allocation
Icenowy Zheng [Sun, 8 Oct 2023 06:46:49 +0000 (14:46 +0800)]
drm/amdgpu: fix SI failure due to doorbells allocation

SI hardware does not have doorbells at all, however currently the code
will try to do the allocation and thus fail, makes SI AMDGPU not usable.

Fix this failure by skipping doorbells allocation when doorbells count
is zero.

Fixes: 54c30d2a8def ("drm/amdgpu: create kernel doorbell pages")
Reviewed-by: Shashank Sharma <shashank.sharma@amd.com>
Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
13 months agodrm/amdgpu: add missing NULL check
Christian König [Fri, 6 Oct 2023 12:04:04 +0000 (14:04 +0200)]
drm/amdgpu: add missing NULL check

bo->tbo.resource can easily be NULL here.

Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2902
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
13 months agodrm/amd/display: Don't set dpms_off for seamless boot
Daniel Miess [Fri, 29 Sep 2023 17:04:33 +0000 (13:04 -0400)]
drm/amd/display: Don't set dpms_off for seamless boot

[Why]
eDPs fail to light up with seamless boot enabled

[How]
When seamless boot is enabled don't configure dpms_off
in disable_vbios_mode_if_required.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Daniel Miess <daniel.miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
13 months agoselftests/bpf: Add testcase for async callback return value failure
David Vernet [Mon, 9 Oct 2023 16:14:14 +0000 (11:14 -0500)]
selftests/bpf: Add testcase for async callback return value failure

A previous commit updated the verifier to print an accurate failure
message for when someone specifies a nonzero return value from an async
callback. This adds a testcase for validating that the verifier emits
the correct message in such a case.

Signed-off-by: David Vernet <void@manifault.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231009161414.235829-2-void@manifault.com
13 months agobpf: Fix verifier log for async callback return values
David Vernet [Mon, 9 Oct 2023 16:14:13 +0000 (11:14 -0500)]
bpf: Fix verifier log for async callback return values

The verifier, as part of check_return_code(), verifies that async
callbacks such as from e.g. timers, will return 0. It does this by
correctly checking that R0->var_off is in tnum_const(0), which
effectively checks that it's in a range of 0. If this condition fails,
however, it prints an error message which says that the value should
have been in (0x0; 0x1). This results in possibly confusing output such
as the following in which an async callback returns 1:

  At async callback the register R0 has value (0x1; 0x0) should have been in (0x0; 0x1)

The fix is easy -- we should just pass the tnum_const(0) as the correct
range to verbose_invalid_scalar(), which will then print the following:

  At async callback the register R0 has value (0x1; 0x0) should have been in (0x0; 0x0)

Fixes: bfc6bb74e4f1 ("bpf: Implement verifier support for validation of async callbacks.")
Signed-off-by: David Vernet <void@manifault.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231009161414.235829-1-void@manifault.com
13 months agodrm/vmwgfx: Keep a gem reference to user bos in surfaces
Zack Rusin [Thu, 28 Sep 2023 04:13:55 +0000 (00:13 -0400)]
drm/vmwgfx: Keep a gem reference to user bos in surfaces

Surfaces can be backed (i.e. stored in) memory objects (mob's) which
are created and managed by the userspace as GEM buffers. Surfaces
grab only a ttm reference which means that the gem object can
be deleted underneath us, especially in cases where prime buffer
export is used.

Make sure that all userspace surfaces which are backed by gem objects
hold a gem reference to make sure they're not deleted before vmw
surfaces are done with them, which fixes:
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 2 PID: 2632 at lib/refcount.c:28 refcount_warn_saturate+0xfb/0x150
Modules linked in: overlay vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock snd_ens1371 snd_ac97_codec ac97_bus snd_pcm gameport>
CPU: 2 PID: 2632 Comm: vmw_ref_count Not tainted 6.5.0-rc2-vmwgfx #1
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
RIP: 0010:refcount_warn_saturate+0xfb/0x150
Code: eb 9e 0f b6 1d 8b 5b a6 01 80 fb 01 0f 87 ba e4 80 00 83 e3 01 75 89 48 c7 c7 c0 3c f9 a3 c6 05 6f 5b a6 01 01 e8 15 81 98 ff <0f> 0b e9 6f ff ff ff 0f b>
RSP: 0018:ffffbdc34344bba0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000027
RDX: ffff960475ea1548 RSI: 0000000000000001 RDI: ffff960475ea1540
RBP: ffffbdc34344bba8 R08: 0000000000000003 R09: 65646e75203a745f
R10: ffffffffa5b32b20 R11: 72657466612d6573 R12: ffff96037d6a6400
R13: ffff9603484805b0 R14: 000000000000000b R15: ffff9603bed06060
FS:  00007f5fd8520c40(0000) GS:ffff960475e80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5fda755000 CR3: 000000010d012005 CR4: 00000000003706e0
Call Trace:
 <TASK>
 ? show_regs+0x6e/0x80
 ? refcount_warn_saturate+0xfb/0x150
 ? __warn+0x91/0x150
 ? refcount_warn_saturate+0xfb/0x150
 ? report_bug+0x19d/0x1b0
 ? handle_bug+0x46/0x80
 ? exc_invalid_op+0x1d/0x80
 ? asm_exc_invalid_op+0x1f/0x30
 ? refcount_warn_saturate+0xfb/0x150
 drm_gem_object_handle_put_unlocked+0xba/0x110 [drm]
 drm_gem_object_release_handle+0x6e/0x80 [drm]
 drm_gem_handle_delete+0x6a/0xc0 [drm]
 ? __pfx_vmw_bo_unref_ioctl+0x10/0x10 [vmwgfx]
 vmw_bo_unref_ioctl+0x33/0x40 [vmwgfx]
 drm_ioctl_kernel+0xbc/0x160 [drm]
 drm_ioctl+0x2d2/0x580 [drm]
 ? __pfx_vmw_bo_unref_ioctl+0x10/0x10 [vmwgfx]
 ? do_vmi_munmap+0xee/0x180
 vmw_generic_ioctl+0xbd/0x180 [vmwgfx]
 vmw_unlocked_ioctl+0x19/0x20 [vmwgfx]
 __x64_sys_ioctl+0x99/0xd0
 do_syscall_64+0x5d/0x90
 ? syscall_exit_to_user_mode+0x2a/0x50
 ? do_syscall_64+0x6d/0x90
 ? handle_mm_fault+0x16e/0x2f0
 ? exit_to_user_mode_prepare+0x34/0x170
 ? irqentry_exit_to_user_mode+0xd/0x20
 ? irqentry_exit+0x3f/0x50
 ? exc_page_fault+0x8e/0x190
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7f5fda51aaff
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 7>
RSP: 002b:00007ffd536a4d30 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffd536a4de0 RCX: 00007f5fda51aaff
RDX: 00007ffd536a4de0 RSI: 0000000040086442 RDI: 0000000000000003
RBP: 0000000040086442 R08: 000055fa603ada50 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffd536a51b8
R13: 0000000000000003 R14: 000055fa5ebb4c80 R15: 00007f5fda90f040
 </TASK>
---[ end trace 0000000000000000 ]---

A lot of the analyis on the bug was done by Murray McAllister and
Ian Forbes.

Reported-by: Murray McAllister <murray.mcallister@gmail.com>
Cc: Ian Forbes <iforbes@vmware.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Fixes: a950b989ea29 ("drm/vmwgfx: Do not drop the reference to the handle too soon")
Cc: <stable@vger.kernel.org> # v6.2+
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230928041355.737635-1-zack@kde.org
13 months agodrm/vmwgfx: fix typo of sizeof argument
Konstantin Meskhidze [Tue, 5 Sep 2023 10:02:03 +0000 (18:02 +0800)]
drm/vmwgfx: fix typo of sizeof argument

Since size of 'header' pointer and '*header' structure is equal on 64-bit
machines issue probably didn't cause any wrong behavior. But anyway,
fixing typo is required.

Fixes: 7a73ba7469cb ("drm/vmwgfx: Use TTM handles instead of SIDs as user-space surface handles.")
Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230905100203.1716731-1-konstantin.meskhidze@huawei.com
13 months agocgroup: Remove duplicates in cgroup v1 tasks file
Michal Koutný [Mon, 9 Oct 2023 13:58:11 +0000 (15:58 +0200)]
cgroup: Remove duplicates in cgroup v1 tasks file

One PID may appear multiple times in a preloaded pidlist.
(Possibly due to PID recycling but we have reports of the same
task_struct appearing with different PIDs, thus possibly involving
transfer of PID via de_thread().)

Because v1 seq_file iterator uses PIDs as position, it leads to
a message:
> seq_file: buggy .next function kernfs_seq_next did not update position index

Conservative and quick fix consists of removing duplicates from `tasks`
file (as opposed to removing pidlists altogether). It doesn't affect
correctness (it's sufficient to show a PID once), performance impact
would be hidden by unconditional sorting of the pidlist already in place
(asymptotically).

Link: https://lore.kernel.org/r/20230823174804.23632-1-mkoutny@suse.com/
Suggested-by: Firo Yang <firo.yang@suse.com>
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
13 months agoxdp: Fix zero-size allocation warning in xskq_create()
Andrew Kanner [Sat, 7 Oct 2023 07:51:49 +0000 (10:51 +0300)]
xdp: Fix zero-size allocation warning in xskq_create()

Syzkaller reported the following issue:

  ------------[ cut here ]------------
  WARNING: CPU: 0 PID: 2807 at mm/vmalloc.c:3247 __vmalloc_node_range (mm/vmalloc.c:3361)
  Modules linked in:
  CPU: 0 PID: 2807 Comm: repro Not tainted 6.6.0-rc2+ #12
  Hardware name: Generic DT based system
  unwind_backtrace from show_stack (arch/arm/kernel/traps.c:258)
  show_stack from dump_stack_lvl (lib/dump_stack.c:107 (discriminator 1))
  dump_stack_lvl from __warn (kernel/panic.c:633 kernel/panic.c:680)
  __warn from warn_slowpath_fmt (./include/linux/context_tracking.h:153 kernel/panic.c:700)
  warn_slowpath_fmt from __vmalloc_node_range (mm/vmalloc.c:3361 (discriminator 3))
  __vmalloc_node_range from vmalloc_user (mm/vmalloc.c:3478)
  vmalloc_user from xskq_create (net/xdp/xsk_queue.c:40)
  xskq_create from xsk_setsockopt (net/xdp/xsk.c:953 net/xdp/xsk.c:1286)
  xsk_setsockopt from __sys_setsockopt (net/socket.c:2308)
  __sys_setsockopt from ret_fast_syscall (arch/arm/kernel/entry-common.S:68)

xskq_get_ring_size() uses struct_size() macro to safely calculate the
size of struct xsk_queue and q->nentries of desc members. But the
syzkaller repro was able to set q->nentries with the value initially
taken from copy_from_sockptr() high enough to return SIZE_MAX by
struct_size(). The next PAGE_ALIGN(size) is such case will overflow
the size_t value and set it to 0. This will trigger WARN_ON_ONCE in
vmalloc_user() -> __vmalloc_node_range().

The issue is reproducible on 32-bit arm kernel.

Fixes: 9f78bf330a66 ("xsk: support use vaddr as ring")
Reported-by: syzbot+fae676d3cf469331fc89@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/000000000000c84b4705fb31741e@google.com/T/
Reported-by: syzbot+b132693e925cbbd89e26@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/000000000000e20df20606ebab4f@google.com/T/
Signed-off-by: Andrew Kanner <andrew.kanner@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: syzbot+fae676d3cf469331fc89@syzkaller.appspotmail.com
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://syzkaller.appspot.com/bug?extid=fae676d3cf469331fc89
Link: https://lore.kernel.org/bpf/20231007075148.1759-1-andrew.kanner@gmail.com
13 months agoMerge tag 'irqchip-fixes-6.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Thomas Gleixner [Mon, 9 Oct 2023 14:01:55 +0000 (16:01 +0200)]
Merge tag 'irqchip-fixes-6.6-2' of git://git./linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip fixes from Marc Zyngier:

  - DT binding updates for Renesas r8a779f0 and rzg2l

  - Let GICv3 honor the "dma-non-coherent" attribute for systems that
    rely on SW guessing what the HW supports

  - Fix the RISC-V INTC probing by marking all devices as initialised
    at once

  - Properly translate interrupt numbers from DT on stm32-exti

  - Use irq_data_get_irq_chip_data() in the rzg2l driver instead of
    blindly dereferencing the irq_data structure

  - Add a MAINTAINERS entry for the various ARM GIC irqchip drivers

  - Remove myself as the top-level irqchip/irqdomain maintainer

Link: https://lore.kernel.org/all/20231007121933.3840357-1-maz@kernel.org
13 months agoriscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values
Björn Töpel [Wed, 4 Oct 2023 12:07:06 +0000 (14:07 +0200)]
riscv, bpf: Track both a0 (RISC-V ABI) and a5 (BPF) return values

The RISC-V BPF uses a5 for BPF return values, which are zero-extended,
whereas the RISC-V ABI uses a0 which is sign-extended. In other words,
a5 and a0 can differ, and are used in different context.

The BPF trampoline are used for both BPF programs, and regular kernel
functions.

Make sure that the RISC-V BPF trampoline saves, and restores both a0
and a5.

Fixes: 49b5e77ae3e2 ("riscv, bpf: Add bpf trampoline support for RV64")
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231004120706.52848-3-bjorn@kernel.org
13 months agoriscv, bpf: Sign-extend return values
Björn Töpel [Wed, 4 Oct 2023 12:07:05 +0000 (14:07 +0200)]
riscv, bpf: Sign-extend return values

The RISC-V architecture does not expose sub-registers, and hold all
32-bit values in a sign-extended format [1] [2]:

  | The compiler and calling convention maintain an invariant that all
  | 32-bit values are held in a sign-extended format in 64-bit
  | registers. Even 32-bit unsigned integers extend bit 31 into bits
  | 63 through 32. Consequently, conversion between unsigned and
  | signed 32-bit integers is a no-op, as is conversion from a signed
  | 32-bit integer to a signed 64-bit integer.

While BPF, on the other hand, exposes sub-registers, and use
zero-extension (similar to arm64/x86).

This has led to some subtle bugs, where a BPF JITted program has not
sign-extended the a0 register (return value in RISC-V land), passed
the return value up the kernel, e.g.:

  | int from_bpf(void);
  |
  | long foo(void)
  | {
  |    return from_bpf();
  | }

Here, a0 would be 0xffff_ffff, instead of the expected
0xffff_ffff_ffff_ffff.

Internally, the RISC-V JIT uses a5 as a dedicated register for BPF
return values.

Keep a5 zero-extended, but explicitly sign-extend a0 (which is used
outside BPF land). Now that a0 (RISC-V ABI) and a5 (BPF ABI) differs,
a0 is only moved to a5 for non-BPF native calls (BPF_PSEUDO_CALL).

Fixes: 2353ecc6f91f ("bpf, riscv: add BPF JIT for RV64G")
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://github.com/riscv/riscv-isa-manual/releases/download/riscv-isa-release-056b6ff-2023-10-02/unpriv-isa-asciidoc.pdf
Link: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/releases/download/draft-20230929-e5c800e661a53efe3c2678d71a306323b60eb13b/riscv-abi.pdf
Link: https://lore.kernel.org/bpf/20231004120706.52848-2-bjorn@kernel.org