linux-kernel - Re: [syzbot] [btrfs?] kernel BUG in __folio_start

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Message-ID: <6748bcc3.050a0220.253251.008c.GAE@google.com>
Date: Thu, 28 Nov 2024 10:56:03 -0800
From: syzbot <syzbot+aac7bff85be224de5156@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, clm@...com, dsterba@...e.com, 
	josef@...icpanda.com, linux-btrfs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, nogikh@...gle.com, syzkaller-bugs@...glegroups.com, 
	willy@...radead.org, wqu@...e.com
Subject: Re: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback

syzbot has bisected this issue to:

commit c87c299776e4d75bcc5559203ae2c37dc0396d80
Author: Qu Wenruo <wqu@...e.com>
Date:   Thu Oct 10 04:46:12 2024 +0000

    btrfs: make buffered write to copy one page a time

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=165dd3c0580000
start commit:   228a1157fb9f Merge tag '6.13-rc-part1-SMB3-client-fixes' o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=155dd3c0580000
console output: https://syzkaller.appspot.com/x/log.txt?x=115dd3c0580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=402159daa216c89d
dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13840778580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17840778580000

Reported-by: syzbot+aac7bff85be224de5156@...kaller.appspotmail.com
Fixes: c87c299776e4 ("btrfs: make buffered write to copy one page a time")

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