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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <c84b2a23b5ea5cc5332c6edcb0a953a0a9ecd4d4.camel@linux.ibm.com>
Date: Fri, 17 Jan 2025 18:37:52 -0500
From: Mimi Zohar <zohar@...ux.ibm.com>
To: Breno Leitao <leitao@...ian.org>,
        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

On Thu, 2025-01-16 at 03:23 -0800, Breno Leitao wrote:
> 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.

It's included in the v6.14 pull request, which I just sent.

thanks,

Mimi