linux-kernel - Re: possible deadlock in pipe

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Message-ID: <0000000000009c33d905a0e70f63@google.com>
Date:   Sun, 15 Mar 2020 09:19:03 -0700
From:   syzbot <syzbot+217d60b447573313b211@...kaller.appspotmail.com>
To:     jencce.kernel@...il.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-unionfs@...r.kernel.org,
        miklos@...redi.hu, mszeredi@...hat.com,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: possible deadlock in pipe_lock (3)

syzbot suspects this bug was fixed by commit:

commit 1a980b8cbf0059a5308eea61522f232fd03002e2
Author: Murphy Zhou <jencce.kernel@...il.com>
Date:   Fri Jan 17 12:49:29 2020 +0000

    ovl: add splice file read write helper

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12dd7dc3e00000
start commit:   46cf053e Linux 5.5-rc3
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35
dashboard link: https://syzkaller.appspot.com/bug?extid=217d60b447573313b211
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=116496c1e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10104649e00000

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

#syz fix: ovl: add splice file read write helper

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