RE: [Xen-devel] kernel BUG at net/core/dev.c:1133!

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: Tim Post [mailto:tim.post@xxxxxxxxxxxxxxx] 
> Sent: 07 July 2006 16:06
> To: Herbert Xu
> Cc: Petersson, Mats; netdev@xxxxxxxxxxxxxxx; 
> xen-devel@xxxxxxxxxxxxxxxxxxx; kaber@xxxxxxxxx; davem@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] kernel BUG at net/core/dev.c:1133!
> 
> I got the exact same thing when attempting to use BOINC on a 
> single node
> supporting a 5 node open SSI cluster, (5 guests) and yes the problem
> went away when I flushed the rules. 
> 
> I attributed this to a quirk with the cluster CVIP, because I had also
> assigned each node its own outbound IP in addition to the 
> incoming CVIP.
> 
> Since I felt it was due to my tendency to over-tinker, I 
> didn't mention
> it on the lists, was a few months ago. 
> 
> Thought I would chime in as it sounds like the same experience, up to
> and including BOINC.

I haven't been tinkering with anything [on purpose, at least] - the
system is a default installation of FC4, with the latest Xen-unstable
[bar the last dozen or so changesets - I don't pull the latest every
half-hour]. 

--
Mats
> 
> HTH
> 
> --Tim
> 
> On Sat, 2006-07-08 at 00:39 +1000, Herbert Xu wrote:
> > Petersson, Mats <Mats.Petersson@xxxxxxx> wrote:
> > > Looks like the GSO is involved?
> > 
> > It's certainly what crashed your machine :) It's probably not the
> > guilty party though.  Someone is passing through a TSO packet with
> > checksum set to something other than CHECKSUM_HW.
> > 
> > I bet it's netfilter and we just never noticed before because real
> > NICS would simply corrupt the checksum silently.
> > 
> > Could you confirm that you have netfilter rules (in particular NAT
> > rules) and that this goes away if you flush all your 
> netfilter tables?
> > 
> > Patrick, do we really have to zap the checksum on outbound 
> NAT? Could
> > we update it instead?
> > 
> > > I got this while running Dom0 only (no guests), with a
> > > BOINC/Rosetta@home application running on all 4 cores. 
> > > 
> > > changeset:   10649:8e55c5c11475
> > > 
> > > Build: x86_32p (pae). 
> > > 
> > > ------------[ cut here ]------------
> > > kernel BUG at net/core/dev.c:1133!
> > > invalid opcode: 0000 [#1]
> > > SMP 
> > > CPU:    0
> > > EIP:    0061:[<c04dceb0>]    Not tainted VLI
> > > EFLAGS: 00210297   (2.6.16.13-xen #12) 
> > > EIP is at skb_gso_segment+0xf0/0x110
> > > eax: 00000000   ebx: 00000003   ecx: 00000002   edx: c06e2e00
> > > esi: 00000008   edi: cd9e32e0   ebp: c63a7900   esp: c0de5ad0
> > > ds: 007b   es: 007b   ss: 0069
> > > Process rosetta_5.25_i6 (pid: 8826, threadinfo=c0de4000 
> task=cb019560)
> > > Stack: <0>c8f69060 00000000 ffffffa3 00000003 cd9e32e0 
> 00000002 c63a7900
> > > c04dcfb0 
> > >       cd9e32e0 00000003 00000000 cd9e32e0 cf8e3000 
> cf8e3140 c04dd07e
> > > cd9e32e0 
> > >       cf8e3000 00000000 cd9e32e0 cf8e3000 c04ec07e 
> cd9e32e0 cf8e3000
> > > c0895140 
> > > Call Trace:
> > > [<c04dcfb0>] dev_gso_segment+0x30/0xb0
> > > [<c04dd07e>] dev_hard_start_xmit+0x4e/0x110
> > > [<c04ec07e>] __qdisc_run+0xbe/0x280
> > > [<c04dd4b9>] dev_queue_xmit+0x379/0x380
> > > [<c05bbe44>] br_dev_queue_push_xmit+0xa4/0x140
> > > [<c05c2402>] br_nf_post_routing+0x102/0x1d0
> > > [<c05c22b0>] br_nf_dev_queue_xmit+0x0/0x50
> > > [<c05bbda0>] br_dev_queue_push_xmit+0x0/0x140
> > > [<c04f0eab>] nf_iterate+0x6b/0xa0
> > > [<c05bbda0>] br_dev_queue_push_xmit+0x0/0x140
> > > [<c05bbda0>] br_dev_queue_push_xmit+0x0/0x140
> > > [<c04f0f4e>] nf_hook_slow+0x6e/0x120
> > > [<c05bbda0>] br_dev_queue_push_xmit+0x0/0x140
> > > [<c05bbf40>] br_forward_finish+0x60/0x70
> > > [<c05bbda0>] br_dev_queue_push_xmit+0x0/0x140
> > > [<c05c1b71>] br_nf_forward_finish+0x71/0x130
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c05c1d20>] br_nf_forward_ip+0xf0/0x1a0
> > > [<c05c1b00>] br_nf_forward_finish+0x0/0x130
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c04f0eab>] nf_iterate+0x6b/0xa0
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c04f0f4e>] nf_hook_slow+0x6e/0x120
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c05bc044>] __br_forward+0x74/0x80
> > > [<c05bbee0>] br_forward_finish+0x0/0x70
> > > [<c05bceb1>] br_handle_frame_finish+0xd1/0x160
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c05c0e0b>] br_nf_pre_routing_finish+0xfb/0x480
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c054fe13>] ip_nat_in+0x43/0xc0
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c04f0eab>] nf_iterate+0x6b/0xa0
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c04f0f4e>] nf_hook_slow+0x6e/0x120
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c05c1914>] br_nf_pre_routing+0x404/0x580
> > > [<c05c0d10>] br_nf_pre_routing_finish+0x0/0x480
> > > [<c04f0eab>] nf_iterate+0x6b/0xa0
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c04f0f4e>] nf_hook_slow+0x6e/0x120
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c05bd124>] br_handle_frame+0x1e4/0x250
> > > [<c05bcde0>] br_handle_frame_finish+0x0/0x160
> > > [<c04ddae5>] netif_receive_skb+0x165/0x2a0
> > > [<c04ddcdf>] process_backlog+0xbf/0x180
> > > [<c04ddebf>] net_rx_action+0x11f/0x1d0
> > > [<c01262e6>] __do_softirq+0x86/0x120
> > > [<c01263f5>] do_softirq+0x75/0x90
> > > [<c0106cef>] do_IRQ+0x1f/0x30
> > > [<c04271d0>] evtchn_do_upcall+0x90/0x100
> > > [<c0105315>] hypervisor_callback+0x3d/0x48
> > > Code: c2 2b 57 24 29 d0 8d 14 2a 89 87 94 00 00 00 89 57 
> 60 8b 44 24 08
> > > 83 c4 0c 5b 5e 5f 5d c3 0f 0
> > > b 69 03 fe 8c 66 c0 e9 69 ff ff ff <0f> 0b 6d 04 e8 ab 6c 
> c0 e9 3a ff ff
> > > ff 0f 0b 6c 04 e8 ab 6c c0 
> > > <0>Kernel panic - not syncing: Fatal exception in interrupt
> > 
> > Cheers,
> 
> 
> 



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