linux-kernel - Re: [syzbot] [netfs?] kernel BUG in folio

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Message-ID: <683b8ea2.a00a0220.d8eae.0020.GAE@google.com>
Date: Sat, 31 May 2025 16:20:02 -0700
From: syzbot <syzbot+c0dc46208750f063d0e0@...kaller.appspotmail.com>
To: asmadeus@...ewreck.org, chao@...nel.org, dhowells@...hat.com, hch@....de, 
	hdanton@...a.com, jaegeuk@...nel.org, jlayton@...nel.org, 
	linux-f2fs-devel@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, netfs@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com, v9fs@...ts.linux.dev, willy@...radead.org
Subject: Re: [syzbot] [netfs?] kernel BUG in folio_unlock (3)

syzbot has bisected this issue to:

commit 80f31d2a7e5f4efa7150c951268236c670bcb068
Author: Christoph Hellwig <hch@....de>
Date:   Thu May 8 05:14:32 2025 +0000

    f2fs: return bool from __write_node_folio

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1129d00c580000
start commit:   0f70f5b08a47 Merge tag 'pull-automount' of git://git.kerne..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1329d00c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=1529d00c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=22765942f2e2ebcf
dashboard link: https://syzkaller.appspot.com/bug?extid=c0dc46208750f063d0e0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15bfe970580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13bfe970580000

Reported-by: syzbot+c0dc46208750f063d0e0@...kaller.appspotmail.com
Fixes: 80f31d2a7e5f ("f2fs: return bool from __write_node_folio")

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