git.ipfire.org Git - thirdparty/kernel/stable.git/commit

author	Lv Yunlong <lyl2019@mail.ustc.edu.cn>
	Sun, 9 May 2021 08:24:02 +0000 (10:24 +0200)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Tue, 20 Jul 2021 14:22:32 +0000 (16:22 +0200)
commit	eec7de8ef2d72011f0c60b7e49da31de8229d51a
tree	ae3a6bb1c5655fc8612835d941a6405d8805d3cc	tree
parent	335ffa643f35e9eca2c7fb24f7a60dda675acaa8	commit \| diff

media: v4l2-core: Avoid the dangling pointer in v4l2_fh_release

[ Upstream commit 7dd0c9e547b6924e18712b6b51aa3cba1896ee2c ]

A use after free bug caused by the dangling pointer
filp->privitate_data in v4l2_fh_release.
See https://lore.kernel.org/patchwork/patch/1419058/.

My patch sets the dangling pointer to NULL to provide
robust.

Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>