This is a note to let you know that I've just added the patch titled

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

to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summ...

The filename of the patch is: drm-nouveau-mem-guard-against-null-pointer-access-in-mem_del.patch and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From d10285a25e29f13353bbf7760be8980048c1ef2f Mon Sep 17 00:00:00 2001

From: Karol Herbst kherbst@redhat.com Date: Wed, 7 Oct 2020 00:05:28 +0200 Subject: drm/nouveau/mem: guard against NULL pointer access in mem_del

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... 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;

Patches currently in stable-queue which might be from kherbst@redhat.com are

queue-5.4/drm-nouveau-mem-guard-against-null-pointer-access-in-mem_del.patch