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drm/nouveau/mem: guard against NULL pointer access in mem_del

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other drivers seems to do something similar

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Cc: Dave Airlie <airlied@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201006220528.13925-2-kherbst@redhat.com
This commit is contained in:
Karol Herbst 2020-10-07 00:05:28 +02:00 committed by Dave Airlie
parent c3e0276c31
commit d10285a25e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/nouveau/nouveau_mem.c
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@ -176,6 +176,8 @@ void
nouveau_mem_del(struct ttm_mem_reg *reg) nouveau_mem_del(struct ttm_mem_reg *reg)
{ {
struct nouveau_mem *mem = nouveau_mem(reg); struct nouveau_mem *mem = nouveau_mem(reg);
if (!mem)
return;
nouveau_mem_fini(mem); nouveau_mem_fini(mem);
kfree(reg->mm_node); kfree(reg->mm_node);
reg->mm_node = NULL; reg->mm_node = NULL;