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

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Message-ID: <00000000000062ec7d05cd6dd2f6@google.com>
Date:   Sun, 03 Oct 2021 00:34:08 -0700
From:   syzbot <syzbot+726f2ce6dbbf2ad8d133@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, 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

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

For information about bisection process see: https://goo.gl/tpsmEJ#bisection