From: Greg KH <gregkh@linuxfoundation•org>
To: Ben Greear <greearb@candelatech•com>
Cc: Eric Dumazet <eric.dumazet@gmail•com>,
David Miller <davem@davemloft•net>,
netdev@vger•kernel.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 13:25:51 -0700 [thread overview]
Message-ID: <20120327202551.GA15798@kroah.com> (raw)
In-Reply-To: <4F722045.80902@candelatech.com>
On Tue, Mar 27, 2012 at 01:17:09PM -0700, Ben Greear wrote:
> 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>
Very nice job Eric, thanks for tracking this down.
greg k-h
next prev parent reply other threads:[~2012-03-27 20:25 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
2012-03-27 20:25 ` Greg KH [this message]
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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