linux-kernel - Re: [PATCH v2] ima: kexec: silence RCU list traversal warning

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Message-ID: <20250116-jovial-stalwart-chipmunk-0b3693@leitao>
Date: Thu, 16 Jan 2025 03:23:29 -0800
From: Breno Leitao <leitao@...ian.org>
To: Mimi Zohar <zohar@...ux.ibm.com>,
	Roberto Sassu <roberto.sassu@...wei.com>,
	Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
	Eric Snowberg <eric.snowberg@...cle.com>,
	Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc: Mimi Zohar <zohar@...ux.vnet.ibm.com>, linux-integrity@...r.kernel.org,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-team@...a.com
Subject: Re: [PATCH v2] ima: kexec: silence RCU list traversal warning

Hello Mimi,

On Thu, Nov 21, 2024 at 01:57:12AM -0800, Breno Leitao wrote:
> The ima_measurements list is append-only and doesn't require
> rcu_read_lock() protection. However, lockdep issues a warning when
> traversing RCU lists without the read lock:
> 
>   security/integrity/ima/ima_kexec.c:40 RCU-list traversed in non-reader section!!

What are the next steps in regarding this issue? I am still seeing this
problem on Linus' tree.

Thanks