Re: [syzbot] [cgroups?] possible deadlock in cgroup_free

[Tejun Heo]

On Thu, Nov 16, 2023 at 05:25:05PM -0800, syzbot wrote:
> syzbot has bisected this issue to:
> 
> commit 2d25a889601d2fbc87ec79b30ea315820f874b78
> Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Date:   Sun Sep 17 11:24:21 2023 +0000
> 
>     ptrace: Convert ptrace_attach() to use lock guards

Looks like the tasklist_lock conversion in ptrace_attach() forgot _irq.
Peter, Oleg?

Thanks.

-- 
tejun