[syzbot] [kernel?] INFO: task hung in restrict_one_thread_callback

[Ding Yihan]

Hi all,

Thanks to syzbot for the testing and confirmation.

Since I am relatively new to the inner workings of this specific subsystem, 
I would like to take a few days to thoroughly study the root cause 
(the task_work and mutex interaction) and prepare a detailed and proper commit message. 

I will send out the formal patch (v1) to the mailing list later.

Best regards,
Yihan Ding

在 2026/2/21 15:11, syzbot 写道:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> 
> Reported-by: syzbot+7ea2f5e9dfd468201817 at syzkaller.appspotmail.com
> Tested-by: syzbot+7ea2f5e9dfd468201817 at syzkaller.appspotmail.com
> 
> Tested on:
> 
> commit:         d4906ae1 Add linux-next specific files for 20260220
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=13ea89e6580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=51f859f3211496bc
> dashboard link: https://syzkaller.appspot.com/bug?extid=7ea2f5e9dfd468201817
> compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> patch:          https://syzkaller.appspot.com/x/patch.diff?x=15f0595a580000
> 
> Note: testing is done by a robot and is best-effort only.
>