linux-kernel - Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in kiocb

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Message-ID: <ea115aca-1c4f-db6f-d4a3-51125db9e75e@kernel.dk>
Date:   Sun, 3 Oct 2021 07:05:04 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     syzbot <syzbot+726f2ce6dbbf2ad8d133@...kaller.appspotmail.com>,
        asml.silence@...il.com, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in
 kiocb_done

On 10/3/21 1:34 AM, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit b8ce1b9d25ccf81e1bbabd45b963ed98b2222df8
> Author: Pavel Begunkov <asml.silence@...il.com>
> Date:   Tue Aug 31 13:13:11 2021 +0000
> 
>     io_uring: don't submit half-prepared drain request
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17b14b67300000
> start commit:   4ac6d90867a4 Merge tag 'docs-5.15' of git://git.lwn.net/li..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3c3a5498e99259cf
> dashboard link: https://syzkaller.appspot.com/bug?extid=726f2ce6dbbf2ad8d133
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=124a3b49300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=142e610b300000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: io_uring: don't submit half-prepared drain request


-- 
Jens Axboe