linux-kernel - Re: [syzbot] KASAN: use-after-free Write in io_submit

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Message-ID: <000000000000ad0e4105d29b6b0f@google.com>
Date:   Tue, 07 Dec 2021 21:04:11 -0800
From:   syzbot <syzbot+3587cbbc6e1868796292@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, bcrl@...ck.org,
        linux-aio@...ck.org, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: [syzbot] KASAN: use-after-free Write in io_submit_one

syzbot has bisected this issue to:

commit 54a88eb838d37af930c9f19e1930a4fba6789cb5
Author: Pavel Begunkov <asml.silence@...il.com>
Date:   Sat Oct 23 16:21:32 2021 +0000

    block: add single bio async direct IO helper

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1615e2b9b00000
start commit:   04fe99a8d936 Add linux-next specific files for 20211207
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1515e2b9b00000
console output: https://syzkaller.appspot.com/x/log.txt?x=1115e2b9b00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4589399873466942
dashboard link: https://syzkaller.appspot.com/bug?extid=3587cbbc6e1868796292
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17db884db00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14e9eabdb00000

Reported-by: syzbot+3587cbbc6e1868796292@...kaller.appspotmail.com
Fixes: 54a88eb838d3 ("block: add single bio async direct IO helper")

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