Re: [syzbot] [iomap?] kernel BUG in folio_end_read (2)

syzbot
2025-11-02T05:39:03Z

syzbot has bisected this issue to:

commit 51311f045375984dabdf8cc523e80d39a4c3dd5a
Author: Joanne Koong <joannelkoong@gmail.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@syzkaller.appspotmail.com
Fixes: 51311f045375 ("iomap: track pending read bytes more optimally")

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