linux-kernel - Re: [PATCH] tracing/net_sched: NULL pointer dereference in perf_trace_qdisc

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Message-ID: <6391f34a-b401-47e8-8093-d3b067f26c1b@gmail.com>
Date: Thu, 4 Jul 2024 20:16:34 +0900
From: Yunseong Kim <yskelg@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jakub Kicinski <kuba@...nel.org>
Cc: stable@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
 Sasha Levin <sashal@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
 Taehee Yoo <ap420073@...il.com>, Pedro Tammela <pctammela@...atatu.com>,
 Austin Kim <austindh.kim@...il.com>, MichelleJin <shjy180909@...il.com>,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 netdev@...r.kernel.org, ppbuk5246@...il.com,
 Yeoreum Yun <yeoreum.yun@....com>
Subject: Re: [PATCH] tracing/net_sched: NULL pointer dereference in
 perf_trace_qdisc_reset()

Hi Greg, Hi Jakub

On 7/4/24 6:32 오후, Greg Kroah-Hartman wrote:
> On Wed, Jul 03, 2024 at 07:18:35PM -0700, Jakub Kicinski wrote:
>> On Wed,  3 Jul 2024 03:01:47 +0900 Yunseong Kim wrote:
>>> Support backports for stable version. There are two places where null
>>> deref could happen before
>>> commit 2c92ca849fcc ("tracing/treewide: Remove second parameter of __assign_str()")
>>> Link: https://lore.kernel.org/linux-trace-kernel/20240516133454.681ba6a0@rorschach.local.home/
>>>
>>> I've checked +v6.1.82 +v6.6.22 +v6.7.10, +v6.8, +6.9, this version need
>>> to be applied, So, I applied the patch, tested it again, and confirmed
>>> working fine.
>>
>> You're missing the customary "[ Upstream commit <upstream commit> ]"
>> line, not sure Greg will pick this up.
>>
> 
> Yeah, I missed this, needs to be very obvious what is happening here.
> I'll replace the version in the queues with this one now, thanks.
> 
> greg k-h


Thank you for your hard work.


This fix need to be applied versions in +v5.10.213, +v5.15.152, +v6.1.82
+v6.6.22, +v6.7.10, +v6.8, +6.9


Warm regards,

Yunseong Kim