linux-kernel - Re: BUG: WARNING in kvfree_rcu

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Message-ID: <Zug4pQjdWtR0ToMn@pc636>
Date: Mon, 16 Sep 2024 15:54:45 +0200
From: Uladzislau Rezki <urezki@...il.com>
To: Juefei Pu <juefei.pu@...il.ucr.edu>
Cc: Xingyu Li <xli399@....edu>, Uladzislau Rezki <urezki@...il.com>,
	paulmck@...nel.org, frederic@...nel.org, neeraj.upadhyay@...nel.org,
	joel@...lfernandes.org, josh@...htriplett.org, boqun.feng@...il.com,
	rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
	jiangshanlai@...il.com, qiang.zhang1211@...il.com,
	rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yu Hao <yhao016@....edu>
Subject: Re: BUG: WARNING in kvfree_rcu_bulk

> After several tests, I found that the same PoC can cause multiple
> different crashes for some unknown reason. Thus, I suspect that the
> bug is capable of performing unintended memory writing without being
> caught by KASAN.
> I tested the PoC on the latest kernel, Linux 6.11 rc7 and it can still
> cause crashes.
> For reproducibility, I've created a GitHub repo at
> https://github.com/TomAPU/Linux611BugReport, which contains the
> software versions we used, the QEMU arguments we used to boot up the
> kernel, the kernel config we used,  the pre-compiled kernel image,
> Dockerfile that can be used to compile the kernel.
> I hope this repo will be helpful for analyzing the bug.
> 
Could you please help to bisect this bug then?

Thanks!

--
Uladzislau Rezki