From: Matthew Wilcox <willy@infradead.org>
To: syzbot <syzbot+8edfa01e46fd9fe3fbfb@syzkaller.appspotmail.com>
Cc: akpm@linux-foundation.org, clm@fb.com, dsterba@suse.com,
hch@lst.de, josef@toxicpanda.com, linmiaohe@huawei.com,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.org
Subject: Re: [syzbot] WARNING in btrfs_space_info_update_bytes_may_use
Date: Mon, 31 Oct 2022 13:50:32 +0000 [thread overview]
Message-ID: <Y1/SqIuP4tbszPAW@casper.infradead.org> (raw)
In-Reply-To: <000000000000fa42c105ec5339ec@google.com>
Dmitry, I don't see a way to tell syzbot that its bisection has gone
astray. Can you add one or document it if it already exists?
On Mon, Oct 31, 2022 at 04:51:22AM -0700, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 0c7c575df56b957390206deb018c41acbb412159
> Author: Matthew Wilcox (Oracle) <willy@infradead.org>
> Date: Wed Feb 24 20:01:52 2021 +0000
>
> mm/filemap: remove dynamically allocated array from filemap_read
This change affects the read path. The crash happens in the unmount
path. The data structure that's being checked is modified in the write
path. I just can't see how this commit is in any way related.
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=119e21b6880000
> start commit: b229b6ca5abb Merge tag 'perf-tools-fixes-for-v6.1-2022-10-..
> git tree: upstream
> final oops: https://syzkaller.appspot.com/x/report.txt?x=139e21b6880000
> console output: https://syzkaller.appspot.com/x/log.txt?x=159e21b6880000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a66c6c673fb555e8
> dashboard link: https://syzkaller.appspot.com/bug?extid=8edfa01e46fd9fe3fbfb
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17db9ab1880000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124e21b6880000
>
> Reported-by: syzbot+8edfa01e46fd9fe3fbfb@syzkaller.appspotmail.com
> Fixes: 0c7c575df56b ("mm/filemap: remove dynamically allocated array from filemap_read")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
next prev parent reply other threads:[~2022-10-31 13:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 0:15 [syzbot] WARNING in btrfs_space_info_update_bytes_may_use syzbot
2022-10-31 11:51 ` syzbot
2022-10-31 13:50 ` Matthew Wilcox [this message]
2022-10-31 14:23 ` David Sterba
2022-10-31 18:57 ` Aleksandr Nogikh
2022-10-31 19:02 ` Aleksandr Nogikh
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