linux-kernel - Re: [syzbot] [gfs2?] UBSAN: shift-out-of-bounds in gfs2_dir

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Message-ID: <ea729bcb-4aac-48c2-9f9f-4eb8b59d1aec@redhat.com>
Date: Tue, 15 Jul 2025 14:00:38 +0100
From: Andrew Price <anprice@...hat.com>
To: agruenba@...hat.com, gfs2@...ts.linux.dev
Cc: syzbot <syzbot+4708579bb230a0582a57@...kaller.appspotmail.com>,
 linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [gfs2?] UBSAN: shift-out-of-bounds in gfs2_dir_read (2)

On 15/07/2025 13:45, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
> WARNING in move_to_new_folio

Known issue, fixed in for-next...

> console output: https://syzkaller.appspot.com/x/log.txt?x=11eb8382580000

Looks like it's hitting the new validation instead of the UB anyway.

Andy