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

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Message-ID: <da6db2de-0f48-490b-8f91-a94e80d0567f@amd.com>
Date: Tue, 15 Apr 2025 11:48:52 +0530
From: Shivank Garg <shivankg@....com>
To: syzbot <syzbot+8bb6fd945af4e0ad9299@...kaller.appspotmail.com>,
 linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [mm?] WARNING in move_to_new_folio



On 4/15/2025 11:10 AM, Shivank Garg wrote:
> I made a mistake in insert_metapage. I hope my revised patch work.
> I'll post it to original list if this pass.
> 
> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 01c6df60d5d4
> 
> Best Regards,
> Shivank
> 
> On 4/15/2025 10:54 AM, syzbot wrote:
>> Hello,
>>
>> syzbot has tested the proposed patch but the reproducer is still triggering an issue:
>> unregister_netdevice: waiting for DEV to become free
>>
>> unregister_netdevice: waiting for batadv0 to become free. Usage count = 3
>>
>>
>> Tested on:
>>
>> commit:         01c6df60 Add linux-next specific files for 20250411
>> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1142f0cc580000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=db03cefa26ecf825
>> dashboard link: https://syzkaller.appspot.com/bug?extid=8bb6fd945af4e0ad9299
>> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>> patch:          https://syzkaller.appspot.com/x/patch.diff?x=107a60cc580000
>>
> 
> 

Looks like this error is unrelated and due to a different issue:
https://lore.kernel.org/lkml/20250414-double_hold_fix-v5-1-10e056324cde@narfation.org

Retesting with Sven Eckelmann's patch for batman-adv

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 01c6df60d5d4

Best Regards,
Shivank




View attachment "revised-diff" of type "text/plain" (5292 bytes)