netdev - Re: [PATCH] ip6mr: Fix RCU list debugging 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]

Date:   Mon, 24 Feb 2020 13:19:41 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     frextrite@...il.com
Cc:     kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org, kuba@...nel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        joel@...lfernandes.org, madhuparnabhowmik10@...il.com,
        paulmck@...nel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] ip6mr: Fix RCU list debugging warning

From: Amol Grover <frextrite@...il.com>
Date: Sat, 22 Feb 2020 22:27:27 +0530

> ip6mr_for_each_table() macro uses list_for_each_entry_rcu()
> for traversing outside an RCU read side critical section
> but under the protection of rtnl_mutex. Hence add the
> corresponding lockdep expression to silence the following
> false-positive warnings:
> 
> [    4.319479] =============================
> [    4.319480] WARNING: suspicious RCU usage
> [    4.319482] 5.5.4-stable #17 Tainted: G            E
> [    4.319483] -----------------------------
> [    4.319485] net/ipv6/ip6mr.c:1243 RCU-list traversed in non-reader section!!
> 
> [    4.456831] =============================
> [    4.456832] WARNING: suspicious RCU usage
> [    4.456834] 5.5.4-stable #17 Tainted: G            E
> [    4.456835] -----------------------------
> [    4.456837] net/ipv6/ip6mr.c:1582 RCU-list traversed in non-reader section!!
> 
> Signed-off-by: Amol Grover <frextrite@...il.com>

Applied, thanks.