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Date:   Sat, 01 Feb 2020 23:05:01 -0800
From:   syzbot <syzbot+44c32606d8669fb0d45c@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, axboe@...nel.dk, dave@...olabs.net,
        hch@....de, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, ming.lei@...hat.com, osandov@...com,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: INFO: task hung in __generic_file_fsync (2)

syzbot suspects this bug was fixed by commit:

commit 85a8ce62c2eabe28b9d76ca4eecf37922402df93
Author: Ming Lei <ming.lei@...hat.com>
Date:   Fri Dec 27 23:05:48 2019 +0000

    block: add bio_truncate to fix guard_bio_eod

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13ebe101e00000
start commit:   bf8d1cd4 Merge tag 'scsi-fixes' of git://git.kernel.org/pu..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35
dashboard link: https://syzkaller.appspot.com/bug?extid=44c32606d8669fb0d45c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137e2615e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11306971e00000

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

#syz fix: block: add bio_truncate to fix guard_bio_eod

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

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