linux-kernel - Re: [syzbot] KASAN: use-after-free Read in io_poll_check

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Message-ID: <00000000000009bb4505db96e211@google.com>
Date:   Fri, 01 Apr 2022 05:26:07 -0700
From:   syzbot <syzbot+edb9c7738ba8cbdbf197@...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] KASAN: use-after-free Read in io_poll_check_events

syzbot has bisected this issue to:

commit d570aa1c4f191100f502edfc240e8d49687f62ac
Author: Jens Axboe <axboe@...nel.dk>
Date:   Thu Mar 31 18:38:46 2022 +0000

    io_uring: drop the old style inflight file tracking

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11507c5b700000
start commit:   e5071887cd22 Add linux-next specific files for 20220401
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=13507c5b700000
console output: https://syzkaller.appspot.com/x/log.txt?x=15507c5b700000
kernel config:  https://syzkaller.appspot.com/x/.config?x=17fed8f59a304eee
dashboard link: https://syzkaller.appspot.com/bug?extid=edb9c7738ba8cbdbf197
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1016f8f3700000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14907c5b700000

Reported-by: syzbot+edb9c7738ba8cbdbf197@...kaller.appspotmail.com
Fixes: d570aa1c4f19 ("io_uring: drop the old style inflight file tracking")

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