linux-kernel - Re: [syzbot] [mm?] WARNING in move_page

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aJyDIAffgcMf6y0h@hyeyoo>
Date: Wed, 13 Aug 2025 21:20:48 +0900
From: Harry Yoo <harry.yoo@...cle.com>
To: syzbot <syzbot+4d9a13f0797c46a29e42@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, jannh@...gle.com, liam.howlett@...cle.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        lorenzo.stoakes@...cle.com, pfalcato@...e.de,
        syzkaller-bugs@...glegroups.com, vbabka@...e.cz
Subject: Re: [syzbot] [mm?] WARNING in move_page_tables

On Tue, Aug 12, 2025 at 10:08:02PM -0700, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> 
> Reported-by: syzbot+4d9a13f0797c46a29e42@...kaller.appspotmail.com
> Tested-by: syzbot+4d9a13f0797c46a29e42@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         0db9b72d mm/userfaultfd: fix kmap_local LIFO ordering ..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-hotfixes-unstable
> console output: https://syzkaller.appspot.com/x/log.txt?x=128fb5a2580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2323b2d6038203a5
> dashboard link: https://syzkaller.appspot.com/bug?extid=4d9a13f0797c46a29e42
> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> 
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.

This looks spurious. I was able to reproduce it with the reproducer on
the same commit (the latest mm-hotfixes-unstable).

-- 
Cheers,
Harry / Hyeonggon