linux-kernel - Re: [syzbot] [cgroups?] [mm?] BUG: unable to handle kernel paging request in percpu_ref_get

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Message-ID: <CAGj-7pWKDkdgpOtdd5D2cvGEq5R7hM8kD1vcnrioUFxOkTUDxw@mail.gmail.com>
Date: Sat, 24 May 2025 21:35:02 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: syzbot <syzbot+3109abc43c8fcf15212b@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, cgroups@...r.kernel.org, hannes@...xchg.org, 
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, mhocko@...nel.org, 
	muchun.song@...ux.dev, roman.gushchin@...ux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [cgroups?] [mm?] BUG: unable to handle kernel paging
 request in percpu_ref_get_many (2)

On Sat, May 24, 2025 at 5:43 PM syzbot
<syzbot+3109abc43c8fcf15212b@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    d7fa1af5b33e Merge branch 'for-next/core' into for-kernelci
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=155428e8580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=89c13de706fbf07a
> dashboard link: https://syzkaller.appspot.com/bug?extid=3109abc43c8fcf15212b
> compiler:       Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
> userspace arch: arm64
>
> Unfortunately, I don't have any reproducer for this issue yet.
>

The tree of this report does not contain the latest (unmerged into
linus tree) mm patches from mm-tree. I will just wait for the
reproducer.