diff options
| author | Nirmoy Das <nirmoy.das@intel.com> | 2023-10-11 15:25:47 +0300 |
|---|---|---|
| committer | Nirmoy Das <nirmoy.das@intel.com> | 2023-10-18 13:45:12 +0300 |
| commit | f1cdb599ce0ef909343d6c8e7d372defbaa382b9 (patch) | |
| tree | 485e742e18625833b9ecfe0ec556057f97796053 /drivers/gpu/drm/i915/gt | |
| parent | 2d6e2b10a773240c636a229e1822e359a166cc20 (diff) | |
| download | linux-f1cdb599ce0ef909343d6c8e7d372defbaa382b9.tar.xz | |
drm/i915: Prevent potential null-ptr-deref in engine_init_common
If measure_breadcrumb_dw() returns an error and bce isn't created,
this commit ensures that intel_engine_destroy_pinned_context()
is not called with a NULL bce.
v2: Fix the subject s/UAF/null-ptr-deref(Jani)
Fixes: b35274993680 ("drm/i915: Create a kernel context for GGTT updates")
Cc: Oak Zeng <oak.zeng@intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231011122547.7085-1-nirmoy.das@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/gt')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_cs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c index 179d9546865b..4a11219e560e 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c @@ -1491,7 +1491,8 @@ static int engine_init_common(struct intel_engine_cs *engine) return 0; err_bce_context: - intel_engine_destroy_pinned_context(bce); + if (bce) + intel_engine_destroy_pinned_context(bce); err_ce_context: intel_engine_destroy_pinned_context(ce); return ret; |