linux-kernel - Re: WARNING in ovl_real_fdget

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Date:   Wed, 24 Jul 2019 21:24:00 -0700
From:   syzbot <syzbot+032bc63605089a199d30@...kaller.appspotmail.com>
To:     amir73il@...il.com, bfields@...ldses.org, jlayton@...nel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-unionfs@...r.kernel.org, miklos@...redi.hu,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: WARNING in ovl_real_fdget_meta

syzbot has bisected this bug to:

commit 387e3746d01c34457d6a73688acd90428725070b
Author: Amir Goldstein <amir73il@...il.com>
Date:   Fri Jun 7 14:24:38 2019 +0000

     locks: eliminate false positive conflicts for write lease

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15a79594600000
start commit:   c6dd78fc Merge branch 'x86-urgent-for-linus' of git://git...
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17a79594600000
console output: https://syzkaller.appspot.com/x/log.txt?x=13a79594600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3c8985c08e1f9727
dashboard link: https://syzkaller.appspot.com/bug?extid=032bc63605089a199d30
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15855334600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17fcc4c8600000

Reported-by: syzbot+032bc63605089a199d30@...kaller.appspotmail.com
Fixes: 387e3746d01c ("locks: eliminate false positive conflicts for write  
lease")

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