Re: 2.6.23-rc4-mm1 OOPS in forcedeth?

Denis V. Lunev wrote:

I have also seen this OOPS on e1000 card. So, looks like driver independent.

By the way, this one has been triggered in a semi-stable way by the
'git-pull'

Do you have this patch:

commit 5c127c58ae9bf196d787815b1bd6b0aec5aee816
Author: David S. Miller [off-list ref]
Date:   Fri Aug 31 14:39:44 2007 -0700

    [TCP]: 'dst' can be NULL in tcp_rto_min()
    
    Reported by Rick Jones.
    
    Signed-off-by: David S. Miller [off-list ref]

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 1ee7212..bbad2cd 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c

@@ -560,7 +560,7 @@ static u32 tcp_rto_min(struct sock *sk)
        struct dst_entry *dst = __sk_dst_get(sk);
        u32 rto_min = TCP_RTO_MIN;
 
-       if (dst_metric_locked(dst, RTAX_RTO_MIN))
+       if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
                rto_min = dst->metrics[RTAX_RTO_MIN-1];
        return rto_min;
 }

Regards,
	Den

Dhaval Giani wrote:

quoted

On Thu, Sep 13, 2007 at 11:51:33PM -0400, Andrew James Wade wrote:

quoted

I have an Oops that may be related:

BUG: unable to handle kernel NULL pointer dereference at virtual address 00000025
printing eip: c037d81b *pde = 00000000
Oops: 0000 [#1]
last sysfs file: /devices/pci0000:00/0000:00:01.0/0000:01:00.0/class

Pid: 0, comm: swapper Not tainted (2.6.23-rc4-mm1-config2 #2)
EIP: 0060:[<c037d81b>] EFLAGS: 00010246 CPU: 0
EIP is at tcp_rto_min+0xb/0x15
EAX: 00000032 EBX: c4c98b68 ECX: fffffffe EDX: 00000000
ESI: c4c98b68 EDI: c055f600 EBP: c4432e40 ESP: c0596dec
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c0596000 task=c052a340 task.ti=c0568000)
Stack: c037d8de c4c98b68 c4c98b68 c037e0ec 00000001 c037f879 c052a8b4 c052a340
       00000000 00000001 c25e1e60 00000000 00000000 00000001 8c176265 8c17678a
       00000000 00000001 00000001 00000000 8c17678a 86000000 ffffffff 007d8b21
Call Trace:
 [<c037d8de>] tcp_rtt_estimator+0xb9/0xfe
 [<c037e0ec>] tcp_ack_saw_tstamp+0x14/0x43
 [<c037f879>] tcp_ack+0x6b8/0x17b8
 [<c03833cc>] tcp_rcv_established+0x519/0x5f1
 [<c038838d>] tcp_v4_do_rcv+0x28/0x2f8
 [<c038a4ce>] tcp_v4_rcv+0x7df/0x83d
 [<c0372542>] ip_local_deliver+0xcc/0x148
 [<c0372975>] ip_rcv+0x3b7/0x3de
 [<c035fa0e>] netif_receive_skb+0x17a/0x1c2
 [<c02cc121>] rtl8139_poll+0x2d9/0x425
 [<c03616d7>] net_rx_action+0xa8/0xc8
 [<c011e8e0>] __do_softirq+0x40/0x90
 [<c010635d>] do_softirq+0x4d/0xb6
 =======================
INFO: lockdep is turned off.
Code: 24 8b 82 88 03 00 00 89 82 40 05 00 00 a1 a0 23 53 c0 89 82 44 05 00 00 83 c4 0c 5b 5e 5f 5d c3 8b 90 88 00 00 00 b8 32 00 00 00 <f6> 42 25 20 74 03 8b 42 54 c3 56
 85 d2 b9 01 00 00 00 0f 45 ca
EIP: [<c037d81b>] tcp_rto_min+0xb/0x15 SS:ESP 0068:c0596dec
Kernel panic - not syncing: Fatal exception in interrupt

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