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Date:   Fri, 22 Mar 2019 14:28:01 -0700
From:   syzbot <syzbot+5cd33f0e6abe2bb3e397@...kaller.appspotmail.com>
To:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org,
        tytso@....edu, viro@...iv.linux.org.uk
Subject: Re: possible deadlock in __generic_file_fsync

syzbot has bisected this bug to:

commit 9022ada8ab6f1f1a932a3c93815061042e6548a5
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Fri Aug 24 20:16:36 2018 +0000

     Merge branch 'for-4.19' of  
git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15330437200000
start commit:   270b77a0 Merge tag 'drm-fixes-2018-10-20-1' of git://anong..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=17330437200000
console output: https://syzkaller.appspot.com/x/log.txt?x=13330437200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b3f55cb3dfcc6c33
dashboard link: https://syzkaller.appspot.com/bug?extid=5cd33f0e6abe2bb3e397
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1436fc45400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11058e2d400000

Reported-by: syzbot+5cd33f0e6abe2bb3e397@...kaller.appspotmail.com
Fixes: 9022ada8ab6f ("Merge branch 'for-4.19' of  
git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq")

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

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