via velocity induced kernel oops/crash

[swmike]

Binary package hint: linux-image-2.6.24-19-generic

Same hardware as in <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/235074>

Behaviour changed after upgrading to 2.6.24-19, now kernel crashes (capslock+scroll lock flashes)

Kernel message:

[ 1303.400070] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000004
[ 1303.425667] printing eip: c02db82a *pde = 00000000
[ 1303.440302] Oops: 0002 [#1] SMP
[ 1303.449940] Modules linked in: isofs udf af_packet rfcomm l2cap bluetooth ppdev cpufreq_conservative cpufreq_stats cpufreq_ondemand cpufreq_userspace cpufreq_powersave freq_table dock container sbs sbshc video output battery iptable_filter ip_tables x_tables xfs sha256_generic aes_i586 dm_crypt ac max6650 padlock_sha padlock_aes blkcipher parport_pc lp parport snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_hwdep snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi evdev snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore ipv6 pcspkr i2c_viapro nvidia(P) agpgart i2c_core button shpchp pci_hotplug ext3 jbd mbcache usbhid hid sg sr_mod cdrom sd_mod pata_acpi via_rhine mii ehci_hcd via_velocity crc_ccitt uhci_hcd pata_via ahci ata_generic usbcore libata scsi_mod raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear md_mod dm_mirror dm_snapshot dm_mod thermal processor fan fbcon tileblit font bitblit softcursor fuse
[ 1303.707275]
[ 1303.711703] Pid: 0, comm: swapper Tainted: P (2.6.24-19-generic #1)
[ 1303.732217] EIP: 0060:[<c02db82a>] EFLAGS: 00010246 CPU: 0
[ 1303.748586] EIP is at tcp_ack+0x39a/0x1d90
[ 1303.760797] EAX: 00000000 EBX: f54c6600 ECX: 00000001 EDX: 00000000
[ 1303.779495] ESI: f63bf300 EDI: 00000001 EBP: f54c6620 ESP: c041dc9c
[ 1303.798192] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 1303.814296] Process swapper (pid: 0, ti=c041c000 task=c03ea3a0 task.ti=c041c000)
[ 1303.835848] Stack: 00000000 00000003 c04df674 f6bc07e0 c03ea3a0 00000092 f63bf380 00000000
[ 1303.860870] 00000401 f5583cc0 00000000 00000000 00000001 f6bc07e0 280229ca 21d311de
[ 1303.885897] 28022bc8 00000000 0000004d 00000000 00000000 00000000 00000001 c0b87577
[ 1303.910921] Call Trace:
[ 1303.918828] [<c02e04d7>] tcp_rcv_established+0x587/0x930
[ 1303.934948] [<f8913d20>] velocity_intr+0x60/0x680 [via_velocity]
[ 1303.953167] [<c031c338>] _read_lock_bh+0x8/0x20
[ 1303.966952] [<f8c366cb>] ipt_do_table+0x20b/0x4b0 [ip_tables]
[ 1303.984382] [<c02e7000>] tcp_v4_do_rcv+0x340/0x6e0
[ 1303.998950] [<c02c8909>] ip_route_input+0x39/0xdf0
[ 1304.013548] [<c0146ce4>] getnstimeofday+0x34/0xe0
[ 1304.027864] [<f8c32080>] ipt_hook+0x0/0x20 [iptable_filter]
[ 1304.044774] [<c02e9bed>] tcp_v4_rcv+0x7bd/0x9a0
[ 1304.058596] [<c02cb809>] ip_local_deliver_finish+0xf9/0x210
[ 1304.075505] [<c02cb49f>] ip_rcv_finish+0xff/0x370
[ 1304.089818] [<c021871f>] strlcpy+0x1f/0x60
[ 1304.102314] [<f8c9645a>] packet_rcv_spkt+0x2a/0x1a0 [af_packet]
[ 1304.120257] [<c02a3d55>] __alloc_skb+0x55/0x120
[ 1304.134045] [<c02cba10>] ip_rcv+0x0/0x290
[ 1304.146276] [<c02a8fb9>] netif_receive_skb+0x379/0x440
[ 1304.161895] [<c02ab9b5>] process_backlog+0x75/0xe0
[ 1304.176471] [<c02ab38d>] net_rx_action+0x12d/0x210
[ 1304.191059] [<c0131d72>] __do_softirq+0x82/0x110
[ 1304.205118] [<c0131e55>] do_softirq+0x55/0x60
[ 1304.218384] [<c013213d>] irq_exit+0x6d/0x80
[ 1304.231127] [<c0106f20>] do_IRQ+0x40/0x70
[ 1304.243359] [<f8960900>] ata_down_xfermask_limit+0x150/0x1f0 [libata]
[ 1304.262893] [<c0105413>] common_interrupt+0x23/0x30
[ 1304.277716] [<c0102f40>] default_idle+0x0/0x60
[ 1304.291258] [<c011ec62>] native_safe_halt+0x2/0x10
[ 1304.305825] [<c0102f7c>] default_idle+0x3c/0x60
[ 1304.319604] [<c0102695>] cpu_idle+0x45/0xd0
[ 1304.332355] [<c0421a5f>] start_kernel+0x31f/0x3b0
[ 1304.346658] [<c0421130>] unknown_bootoption+0x0/0x1e0
[ 1304.362022] =======================
[ 1304.372673] Code: 83 4c 24 7c 04 8b 44 24 74 85 c0 0f 84 71 03 00 00 8b 44 24 18 83 68 08 01 8b 43 04 8b 13 c7 43 04 00 00 00 00 c7 03 00 00 00 00 <89> 42 04 89 10 8b 43 50 05 b0 00 00 00 3b 83 a8 00 00 00 0f 8f
[ 1304.429719] EIP: [<c02db82a>] tcp_ack+0x39a/0x1d90 SS:ESP 0068:c041dc9c
[ 1304.449523] Kernel panic - not syncing: Fatal exception in interrupt

[swmike (ubuntu-s-plass)]

I have been running a own-compiled 2.6.26-rc8 now for 6 days with sometimes very heavy load and no oops or crash, so whatever the problem is, it seems to be fixed in 2.6.26-rc8.

[Leann Ogasawara (leannogasawara)]

The Ubuntu Kernel Team is planning to move to the 2.6.27 kernel for the upcoming Intrepid Ibex 8.10 release. As a result, the kernel team would appreciate it if you could please test this newer 2.6.27 Ubuntu kernel. There are one of two ways you should be able to test:

1) If you are comfortable installing packages on your own, the linux-image-2.6.27-* package is currently available for you to install and test.

--or--

2) The upcoming Alpha5 for Intrepid Ibex 8.10 will contain this newer 2.6.27 Ubuntu kernel. Alpha5 is set to be released Thursday Sept 4. Please watch http://www.ubuntu.com/testing for Alpha5 to be announced. You should then be able to test via a LiveCD.

Please let us know immediately if this newer 2.6.27 kernel resolves the bug reported here or if the issue remains. More importantly, please open a new bug report for each new bug/regression introduced by the 2.6.27 kernel and tag the bug report with 'linux-2.6.27'. Also, please specifically note if the issue does or does not appear in the 2.6.26 kernel. Thanks again, we really appreicate your help and feedback.

[swmike (ubuntu-s-plass)]

I will either re-install alpha4 and upgrade to 2.6.27 kernel or wait for alpha5, depending on time during the weekend.

[kernel-janitor (kernel-janitor)]

Hi swmike,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux-image-`uname -r` 243251

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[swmike (ubuntu-s-plass)]

I don't have this motherboard in use anymore (was too unstable) so I have no idea whether this is still a problem or not.

[Leann Ogasawara (leannogasawara)]

Thanks for the update. Based on the previous response I'm just going to go ahead and close this bug.