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drm/i915/gt: Potential error pointer dereference in pinned_context()
author
Dan Carpenter
<dan.carpenter@oracle.com>
Fri, 13 Aug 2021 11:36:00 +0000
(14:36 +0300)
committer
Jani Nikula
<jani.nikula@intel.com>
Tue, 24 Aug 2021 14:23:03 +0000
(17:23 +0300)
If the intel_engine_create_pinned_context() function returns an error
pointer, then dereferencing "ce" will Oops. Use "vm" instead of
"ce->vm".
Fixes:
cf586021642d
("drm/i915/gt: Pipelined page migration")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/20210813113600.GC30697@kili
(cherry picked from commit
ff12ce2c9cb1cd09017151424db66de803984abc
)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/gt/intel_migrate.c
patch
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diff --git
a/drivers/gpu/drm/i915/gt/intel_migrate.c
b/drivers/gpu/drm/i915/gt/intel_migrate.c
index
d0a7c93
..
1dac21a
100644
(file)
--- a/
drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/
drivers/gpu/drm/i915/gt/intel_migrate.c
@@
-177,7
+177,7
@@
static struct intel_context *pinned_context(struct intel_gt *gt)
ce = intel_engine_create_pinned_context(engine, vm, SZ_512K,
I915_GEM_HWS_MIGRATE,
&key, "migrate");
- i915_vm_put(
ce->
vm);
+ i915_vm_put(vm);
return ce;
}