From: David Miller <davem@davemloft.net>
To: jeffrey.t.kirsher@intel.com
Cc: netdev@vger.kernel.org, emil.s.tantilov@intel.com
Subject: Re: [BUG] NULL pointer dereference in skb_dequeue
Date: Fri, 01 Aug 2008 18:03:37 -0700 (PDT) [thread overview]
Message-ID: <20080801.180337.233358413.davem@davemloft.net> (raw)
In-Reply-To: <9929d2390808011640o58453023s623faa8930064505@mail.gmail.com>
From: "Jeff Kirsher" <jeffrey.t.kirsher@intel.com>
Date: Fri, 1 Aug 2008 16:40:04 -0700
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
> IP: [<ffffffff8047b8f3>] __skb_dequeue+0x2d/0x35
> PGD 0
> Oops: 0002 [1] SMP
> CPU 2
> Modules linked in: igb nfsd lockd exportfs sunrpc pci_slot inet_lro
> [last unloaded: igb]
> Pid: 13, comm: events/2 Not tainted 2.6.27-rc1-igb #1
> RIP: 0010:[<ffffffff8047b8f3>] [<ffffffff8047b8f3>] __skb_dequeue+0x2d/0x35
...
> [<ffffffff8047bad4>] ? pfifo_fast_reset+0x1f/0x4c
Looks like two threads are accessing the qdisc SKB lists but one of
them isn't taking the proper qdisc locks.
I can't see how this can happen currently but I'll try to figure it
out.
next prev parent reply other threads:[~2008-08-02 1:03 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-01 23:40 [BUG] NULL pointer dereference in skb_dequeue Jeff Kirsher
2008-08-02 1:03 ` David Miller [this message]
2008-08-02 1:20 ` David Miller
2008-08-02 9:36 ` Tantilov, Emil S
2008-08-02 13:37 ` Jarek Poplawski
2008-08-02 16:27 ` Jarek Poplawski
2008-08-02 19:18 ` David Miller
2008-08-02 19:22 ` David Miller
2008-08-02 19:45 ` Tantilov, Emil S
2008-08-02 21:46 ` Tantilov, Emil S
2008-08-03 2:26 ` David Miller
2008-08-08 19:38 ` Tantilov, Emil S
2008-08-09 7:29 ` David Miller
2008-08-09 22:32 ` Jarek Poplawski
2008-08-10 19:04 ` Jarek Poplawski
2008-08-11 10:01 ` Jarek Poplawski
2008-08-11 23:26 ` Paul E. McKenney
2008-08-12 6:36 ` Jarek Poplawski
2008-08-12 13:42 ` Paul E. McKenney
2008-08-12 18:09 ` Jarek Poplawski
2008-08-12 20:18 ` Paul E. McKenney
2008-08-12 21:15 ` Jarek Poplawski
2008-08-12 22:33 ` Paul E. McKenney
2008-08-02 20:19 ` Jarek Poplawski
2008-08-03 9:29 ` Jarek Poplawski
2008-08-03 9:50 ` Jarek Poplawski
2008-08-03 9:56 ` David Miller
2008-08-03 10:08 ` Jarek Poplawski
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