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| author | Lv Yunlong <lyl2019@mail.ustc.edu.cn> | 2021-05-09 10:24:02 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-06-02 13:17:44 +0200 |
| commit | 7dd0c9e547b6924e18712b6b51aa3cba1896ee2c (patch) | |
| tree | 15797b4f8f8d774e8ede87ffff64cba0d510781b /drivers | |
| parent | 01fe904c9afd26e79c1f73aa0ca2e3d785e5e319 (diff) | |
| download | linux-7dd0c9e547b6924e18712b6b51aa3cba1896ee2c.tar.bz2 | |
media: v4l2-core: Avoid the dangling pointer in v4l2_fh_release
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-fh.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-fh.c b/drivers/media/v4l2-core/v4l2-fh.c index 684574f58e82..90eec79ee995 100644 --- a/drivers/media/v4l2-core/v4l2-fh.c +++ b/drivers/media/v4l2-core/v4l2-fh.c @@ -96,6 +96,7 @@ int v4l2_fh_release(struct file *filp) v4l2_fh_del(fh); v4l2_fh_exit(fh); kfree(fh); + filp->private_data = NULL; } return 0; } |