linux-kernel - Re: [syzbot] WARNING in reiserfs_put

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Message-ID: <20210726182039.GP20621@quack2.suse.cz>
Date:   Mon, 26 Jul 2021 20:20:39 +0200
From:   Jan Kara <jack@...e.cz>
To:     syzbot <syzbot+fcdd69a8426baab36109@...kaller.appspotmail.com>
Cc:     axboe@...nel.dk, ground_handling@...x-aviation.co.id, hare@...e.de,
        hch@....de, jack@...e.cz, jeffm@...e.com,
        linux-kernel@...r.kernel.org, mszeredi@...hat.com,
        reiserfs-devel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        yukuai3@...wei.com
Subject: Re: [syzbot] WARNING in reiserfs_put_super

On Sun 25-07-21 12:50:09, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit f902b02600028dfc0c9df811eb711ac7d7fca09f
> Author: Christoph Hellwig <hch@....de>
> Date:   Thu Nov 14 14:34:32 2019 +0000
> 
>     block: refactor rescan_partitions

Looks unlikely. Also because the first report of this problem was 307 days
ago - i.e., before this commit landed. I rather think the reproducer isn't
quite reliable...

								Honza

> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=166889b2300000
> start commit:   90d856e71443 Add linux-next specific files for 20210723
> git tree:       linux-next
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=156889b2300000
> console output: https://syzkaller.appspot.com/x/log.txt?x=116889b2300000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=298516715f6ad5cd
> dashboard link: https://syzkaller.appspot.com/bug?extid=fcdd69a8426baab36109
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=146b2066300000
> 
> Reported-by: syzbot+fcdd69a8426baab36109@...kaller.appspotmail.com
> Fixes: f902b0260002 ("block: refactor rescan_partitions")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR