[PATCH] drm/i915/gt: Potential error pointer dereference in pinned_context()
Thomas Hellström
thomas.hellstrom at linux.intel.com
Fri Aug 13 14:01:06 UTC 2021
On 8/13/21 1:36 PM, Dan Carpenter wrote:
> 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 at oracle.com>
> ---
> drivers/gpu/drm/i915/gt/intel_migrate.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
> index d0a7c934fd3b..1dac21aa7e5c 100644
> --- 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;
> }
>
Thanks,
Reviewed-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
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