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drm/nouveau/mem: guard against NULL pointer access in mem_del
author
Karol Herbst
<kherbst@redhat.com>
Tue, 6 Oct 2020 22:05:28 +0000
(
00:05
+0200)
committer
Dave Airlie
<airlied@redhat.com>
Wed, 7 Oct 2020 05:33:09 +0000
(15:33 +1000)
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
drivers/gpu/drm/nouveau/nouveau_mem.c
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diff --git
a/drivers/gpu/drm/nouveau/nouveau_mem.c
b/drivers/gpu/drm/nouveau/nouveau_mem.c
index
b1bb542
..
e5fae57
100644
(file)
--- a/
drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/
drivers/gpu/drm/nouveau/nouveau_mem.c
@@
-176,6
+176,8
@@
void
nouveau_mem_del(struct ttm_mem_reg *reg)
{
struct nouveau_mem *mem = nouveau_mem(reg);
+ if (!mem)
+ return;
nouveau_mem_fini(mem);
kfree(reg->mm_node);
reg->mm_node = NULL;