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From: Ben Greear <greearb@candelatech.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>,
	netdev@vger.kernel.org, gregkh@linuxfoundation.org,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Dave Jones <davej@redhat.com>
Subject: Re: [PATCH] net: fix a potential rcu_read_lock() imbalance in rt6_fill_node()
Date: Tue, 27 Mar 2012 13:17:09 -0700	[thread overview]
Message-ID: <4F722045.80902@candelatech.com> (raw)
In-Reply-To: <1332878032.3547.39.camel@edumazet-glaptop>

On 03/27/2012 12:53 PM, Eric Dumazet wrote:
> Commit f2c31e32b378 (net: fix NULL dereferences in check_peer_redir() )
> added a regression in rt6_fill_node(), leading to rcu_read_lock()
> imbalance.
>
> Thats because NLA_PUT() can make a jump to nla_put_failure label.
>
> Fix this by using nla_put()
>
> Many thanks to Ben Greear for his help
>
> Reported-by: Ben Greear<greearb@candelatech.com>
> Reported-by: Dave Jones<davej@redhat.com>
> Signed-off-by: Eric Dumazet<eric.dumazet@gmail.com>

This does indeed fix the problem for me (tested in the 3.0.25 kernel).
So, please feel free to add:

Tested-by: Ben Greear <greearb@candelatech.com>

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

  parent reply	other threads:[~2012-03-27 20:17 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-26 21:43 RCU lock bug in 3.0.21 (bisected to: 682cb56a, fix NULL dereferences in check_peer_redir) Ben Greear
2012-03-26 21:49 ` David Miller
2012-03-26 21:53   ` Ben Greear
2012-03-26 23:06     ` Ben Greear
2012-03-26 23:11       ` David Miller
2012-03-26 23:39       ` Eric Dumazet
2012-03-26 23:46         ` Ben Greear
2012-03-26 23:53           ` Ben Greear
2012-03-27  0:07           ` Eric Dumazet
2012-03-27  5:11             ` Paul E. McKenney
2012-03-27  5:30               ` Ben Greear
2012-03-27 16:47                 ` Paul E. McKenney
2012-03-27 16:47         ` Ben Greear
2012-03-27 18:06           ` Eric Dumazet
2012-03-27 19:39           ` Eric Dumazet
2012-03-27 19:53             ` [PATCH] net: fix a potential rcu_read_lock() imbalance in rt6_fill_node() Eric Dumazet
2012-03-27 20:07               ` Ben Greear
2012-03-27 20:17               ` Ben Greear [this message]
2012-03-27 20:25                 ` Greg KH
2012-03-27 22:22               ` David Miller
2012-03-28  0:54                 ` John Fastabend
2012-03-28  1:27                   ` David Miller

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