linux-kernel - Re: possible deadlock in do

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Date:   Sat, 31 Oct 2020 17:21:12 -0700
From:   syzbot <syzbot+e6d5398a02c516ce5e70@...kaller.appspotmail.com>
To:     bfields@...ldses.org, boqun.feng@...il.com, jlayton@...nel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, peterz@...radead.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk,
        will@...nel.org
Subject: Re: possible deadlock in do_fcntl

syzbot has bisected this issue to:

commit e918188611f073063415f40fae568fa4d86d9044
Author: Boqun Feng <boqun.feng@...il.com>
Date:   Fri Aug 7 07:42:20 2020 +0000

    locking: More accurate annotations for read_lock()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1292881a500000
start commit:   4e78c578 Add linux-next specific files for 20201030
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1192881a500000
console output: https://syzkaller.appspot.com/x/log.txt?x=1692881a500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=83318758268dc331
dashboard link: https://syzkaller.appspot.com/bug?extid=e6d5398a02c516ce5e70
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13b24ecc500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13c01512500000

Reported-by: syzbot+e6d5398a02c516ce5e70@...kaller.appspotmail.com
Fixes: e918188611f0 ("locking: More accurate annotations for read_lock()")

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