git.kernel.dk Git - linux-2.6-block.git/commit

author	Pavel Skripkin <paskripkin@gmail.com>
	Thu, 30 Dec 2021 22:47:50 +0000 (01:47 +0300)
committer	Wolfram Sang <wsa@kernel.org>
	Fri, 31 Dec 2021 13:28:22 +0000 (14:28 +0100)
commit	bb436283e25aaf1533ce061605d23a9564447bdf
tree	e8680ff3596ee9b7f53dc4fbcaeca7d40d98ab07	tree \| snapshot
parent	fc74e0a40e4f9fd0468e34045b0c45bba11dcbb2	commit \| diff

i2c: validate user data in compat ioctl

Wrong user data may cause warning in i2c_transfer(), ex: zero msgs.
Userspace should not be able to trigger warnings, so this patch adds
validation checks for user data in compact ioctl to prevent reported
warnings

Reported-and-tested-by: syzbot+e417648b303855b91d8a@syzkaller.appspotmail.com
Fixes: 7d5cb45655f2 ("i2c compat ioctls: move to ->compat_ioctl()")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>