linux-kernel - Re: [PATCH v2] vt: Reject zero-sized screen buffer size.

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Message-ID: <4f9a7d46-223a-5178-ae82-4e973f5d8a29@i-love.sakura.ne.jp>
Date:   Tue, 21 Jul 2020 08:00:26 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Brooke Basile <brookebasile@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        linux-kernel@...r.kernel.org,
        syzbot <syzbot+017265e8553724e514e8@...kaller.appspotmail.com>
Subject: Re: [PATCH v2] vt: Reject zero-sized screen buffer size.

On 2020/07/21 0:40, Brooke Basile wrote:
> Looks like this patch also fixes this bug reported by syzbot:
>     https://syzkaller.appspot.com/bug?id=dc5c6b1ae4952a5d72d0e82de0eeeb9e5f767efc
> 
> There's a lot of other bugs that were reported by syzbot that also touch this code, so I just wanted to give a heads up in case you weren't already aware of them.  It seems like this patch could be a fix for all of them.
> 
> Here are the links to those other bugs:
>     https://syzkaller.appspot.com/bug?id=3e2ad4922b18026c1579f50900747401842acdff
>     https://syzkaller.appspot.com/bug?id=7329638ab83b70fc8fab07e14c4b2fcdc73af21d
>     https://syzkaller.appspot.com/bug?id=01703eb07363bd1f9757bc4a54994455fc9db9dc
>     https://syzkaller.appspot.com/bug?id=7a04be77a06aae337077e00f0ecdb2239dfc2fc3
>     https://syzkaller.appspot.com/bug?id=ff1543b5ade351b9d6c4ef51c805d89422a8271d
> 

Indeed they all access around UINT_MAX address. Marked as dup. Thank you.