netdev - Re: [PATCH net v2] netvsc: add rcu_read locking to netvsc callback

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: <20170111.163101.2187875318579580298.davem@davemloft.net>
Date:   Wed, 11 Jan 2017 16:31:01 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     stephen@...workplumber.org
Cc:     netdev@...r.kernel.org, sthemmin@...rosoft.com
Subject: Re: [PATCH net v2] netvsc: add rcu_read locking to netvsc callback

From: Stephen Hemminger <stephen@...workplumber.org>
Date: Wed, 11 Jan 2017 09:16:32 -0800

> The receive callback (in tasklet context) is using RCU to get reference
> to associated VF network device but this is not safe. RCU read lock
> needs to be held. Found by running with full lockdep debugging
> enabled.
> 
> Fixes: f207c10d9823 ("hv_netvsc: use RCU to protect vf_netdev")
> Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
> ---
> v2 - fix commit message

Applied and queued up for -stable.