tree 4a87a671a928e8949c536c434f7bb4c869fbdb18
parent 582de9e38584f0578c2d2934644bc61d9247e707
author liuyuntao <liuyuntao10@huawei.com> 1630147401 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1637240642 +0100

virtio-gpu: fix possible memory allocation failure

[ Upstream commit 5bd4f20de8acad37dbb3154feb34dbc36d506c02 ]

When kmem_cache_zalloc in virtio_gpu_get_vbuf fails, it will return
an error code. But none of its callers checks this error code, and
a core dump will take place.

Considering many of its callers can't handle such error, I add
a __GFP_NOFAIL flag when calling kmem_cache_zalloc to make sure
it won't fail, and delete those unused error handlings.

Fixes: dc5698e80cf724 ("Add virtio gpu driver.")
Signed-off-by: Yuntao Liu <liuyuntao10@huawei.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210828104321.3410312-1-liuyuntao10@huawei.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>