linux-kernel - Re: [syzbot] [usb?] INFO: rcu detected stall in __mod

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Message-ID: <bd966ef1-feb3-4ada-b133-e3c865a1e6f9@rowland.harvard.edu>
Date: Thu, 5 Sep 2024 10:36:12 -0400
From: Alan Stern <stern@...land.harvard.edu>
To: syzbot <syzbot+ab28cee83cdcfd7f87ca@...kaller.appspotmail.com>
Cc: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, rafael@...nel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [usb?] INFO: rcu detected stall in __mod_timer (5)

On Wed, Sep 04, 2024 at 04:10:02PM -0700, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 22f00812862564b314784167a89f27b444f82a46
> Author: Alan Stern <stern@...land.harvard.edu>
> Date:   Fri Jun 14 01:30:43 2024 +0000
> 
>     USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14eb4cab980000
> start commit:   e0cce98fe279 Merge tag 'tpmdd-next-6.10-rc2' of git://git...
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b9016f104992d69c
> dashboard link: https://syzkaller.appspot.com/bug?extid=ab28cee83cdcfd7f87ca
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=126531d6980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12b27be6980000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: USB: class: cdc-wdm: Fix CPU lockup caused by excessive log messages

> For information about bisection process see: https://goo.gl/tpsmEJ#bisection