netdev - Re: [PATCH] ipv4: fix the rcu race between free_fib_info and ip_route_output

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

Message-ID: <1337758894.3361.2064.camel@edumazet-glaptop>
Date:	Wed, 23 May 2012 09:41:34 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yanmin Zhang <yanmin_zhang@...ux.intel.com>
Cc:	David Miller <davem@...emloft.net>, kunx.jiang@...el.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipv4: fix the rcu race between free_fib_info and
 ip_route_output_slow

On Wed, 2012-05-23 at 09:39 +0200, Eric Dumazet wrote:

> spinlock is needed mainly because of ip_fib_check_default(), but this
> could be changed to use RCU as well. 
> 
> (readers use RCU, writers already hold RTNL -> no more fib_info_lock )

Since its not a fast path and hash table can be resized, its probably
not worth the pain.


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html