Commit 7dd0c9e5 authored by Lv Yunlong's avatar Lv Yunlong Committed by Mauro Carvalho Chehab
Browse files

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: default avatarLv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: default avatarHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 01fe904c

drivers/media/v4l2-core/v4l2-fh.c

+1 −0
Original line number Diff line number Diff line
@@ -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;

}