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

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Message-ID: <000000000000fa42c105ec5339ec@google.com>
Date:   Mon, 31 Oct 2022 04:51:22 -0700
From:   syzbot <syzbot+8edfa01e46fd9fe3fbfb@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, clm@...com, dsterba@...e.com,
        hch@....de, josef@...icpanda.com, linmiaohe@...wei.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, torvalds@...ux-foundation.org,
        willy@...radead.org
Subject: Re: [syzbot] WARNING in btrfs_space_info_update_bytes_may_use

syzbot has bisected this issue to:

commit 0c7c575df56b957390206deb018c41acbb412159
Author: Matthew Wilcox (Oracle) <willy@...radead.org>
Date:   Wed Feb 24 20:01:52 2021 +0000

    mm/filemap: remove dynamically allocated array from filemap_read

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@...kaller.appspotmail.com
Fixes: 0c7c575df56b ("mm/filemap: remove dynamically allocated array from filemap_read")

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