netdev - Re: [syzbot] [usb?] INFO: rcu detected stall in __run_timer

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Message-ID: <3eb71b17-33c3-42fa-86e6-459c3bfdbf29@rowland.harvard.edu>
Date: Wed, 31 Jul 2024 10:08:29 -0400
From: Alan Stern <stern@...land.harvard.edu>
To: syzbot <syzbot+1acbadd9f48eeeacda29@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, brauner@...nel.org, davem@...emloft.net,
	dvyukov@...gle.com, elver@...gle.com, glider@...gle.com,
	gregkh@...uxfoundation.org, hdanton@...a.com, jhs@...atatu.com,
	kasan-dev@...glegroups.com, keescook@...omium.org, kuba@...nel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-usb@...r.kernel.org, luyun@...inos.cn,
	netdev@...r.kernel.org, pctammela@...atatu.com, rafael@...nel.org,
	syzkaller-bugs@...glegroups.com, victor@...atatu.com,
	vinicius.gomes@...el.com, viro@...iv.linux.org.uk,
	vladimir.oltean@....com
Subject: Re: [syzbot] [usb?] INFO: rcu detected stall in __run_timer_base

On Wed, Jul 31, 2024 at 04:57:02AM -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=14f906bd980000
> start commit:   89be4025b0db Merge tag '6.10-rc1-smb3-client-fixes' of git..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b9016f104992d69c
> dashboard link: https://syzkaller.appspot.com/bug?extid=1acbadd9f48eeeacda29
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=145ed3fc980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11c1541c980000
> 
> 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