linux-kernel - Re: [PATCH v3] i2c: validate user data in compat ioctl

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Message-ID: <Yc8GSBr46QHEYcuI@kunai>
Date:   Fri, 31 Dec 2021 14:31:52 +0100
From:   Wolfram Sang <wsa@...nel.org>
To:     Pavel Skripkin <paskripkin@...il.com>
Cc:     viro@...iv.linux.org.uk, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        syzbot+e417648b303855b91d8a@...kaller.appspotmail.com
Subject: Re: [PATCH v3] i2c: validate user data in compat ioctl

On Fri, Dec 31, 2021 at 01:47:50AM +0300, Pavel Skripkin wrote:
> 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@...kaller.appspotmail.com
> Fixes: 7d5cb45655f2 ("i2c compat ioctls: move to ->compat_ioctl()")
> Signed-off-by: Pavel Skripkin <paskripkin@...il.com>

Applied to for-current, thanks!


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