linux-kernel - Re: possible deadlock in send

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Date:   Fri, 29 Jan 2021 09:36:07 -0800
From:   syzbot <syzbot+907b8537e3b0e55151fc@...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 send_sigio (2)

syzbot suspects this issue was fixed by commit:

commit 8d1ddb5e79374fb277985a6b3faa2ed8631c5b4c
Author: Boqun Feng <boqun.feng@...il.com>
Date:   Thu Nov 5 06:23:51 2020 +0000

    fcntl: Fix potential deadlock in send_sig{io, urg}()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17455db4d00000
start commit:   7b1b868e Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3416bb960d5c705d
dashboard link: https://syzkaller.appspot.com/bug?extid=907b8537e3b0e55151fc
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=163e046b500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12f8b623500000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fcntl: Fix potential deadlock in send_sig{io, urg}()

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