linux-kernel - Re: [PATCH net,v3] net: ppp: Fix deadlock caused by unsafe-irq lock in ap

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Message-ID: <0032f249-7787-4875-a782-0847c04d5c9c@kernel.org>
Date: Mon, 22 Apr 2024 08:39:58 +0200
From: Jiri Slaby <jirislaby@...nel.org>
To: Jakub Kicinski <kuba@...nel.org>, Jeongjun Park <aha310510@...il.com>
Cc: syzbot+393d0ef63475d9bb1f16@...kaller.appspotmail.com,
 davem@...emloft.net, edumazet@...gle.com, linux-kernel@...r.kernel.org,
 linux-ppp@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com,
 gregkh@...uxfoundation.org, syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH net,v3] net: ppp: Fix deadlock caused by unsafe-irq lock
 in ap_get()

On 20. 04. 24, 2:31, Jakub Kicinski wrote:
> On Sat, 20 Apr 2024 03:38:15 +0900 Jeongjun Park wrote:
>> read_lock() present in ap_get() is interrupt-vulnerable, so the function needs to be modified.
>>
>>
>> Reported-by: syzbot+393d0ef63475d9bb1f16@...kaller.appspotmail.com
> 
> Improve the commit message to explain the problem more clearly.

Esp. I would like to see the stack trace leading to the problem (be it 
generated or investigated).

thanks,
-- 
js
suse labs