linux-kernel - Re: [syzbot] [iomap?] kernel BUG in folio_end

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Message-ID: <6906ee76.050a0220.29fc44.0016.GAE@google.com>
Date: Sat, 01 Nov 2025 22:39:02 -0700
From: syzbot <syzbot+3686758660f980b402dc@...kaller.appspotmail.com>
To: brauner@...nel.org, chao@...nel.org, djwong@...nel.org, jaegeuk@...nel.org, 
	joannelkoong@...il.com, linux-f2fs-devel@...ts.sourceforge.net, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-xfs@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [iomap?] kernel BUG in folio_end_read (2)

syzbot has bisected this issue to:

commit 51311f045375984dabdf8cc523e80d39a4c3dd5a
Author: Joanne Koong <joannelkoong@...il.com>
Date:   Fri Sep 26 00:26:02 2025 +0000

    iomap: track pending read bytes more optimally

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=103a0012580000
start commit:   98bd8b16ae57 Add linux-next specific files for 20251031
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=123a0012580000
console output: https://syzkaller.appspot.com/x/log.txt?x=143a0012580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=63d09725c93bcc1c
dashboard link: https://syzkaller.appspot.com/bug?extid=3686758660f980b402dc
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=176fc342580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10403f34580000

Reported-by: syzbot+3686758660f980b402dc@...kaller.appspotmail.com
Fixes: 51311f045375 ("iomap: track pending read bytes more optimally")

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