Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 06/49] drm/nouveau/mem: guard against NULL pointer access in mem_del | Date | Mon, 12 Oct 2020 15:26:52 +0200 |
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From: Karol Herbst <kherbst@redhat.com>
commit d10285a25e29f13353bbf7760be8980048c1ef2f upstream.
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 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/nouveau/nouveau_mem.c | 2 ++ 1 file changed, 2 insertions(+)
--- 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;
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