[etherlab-users] Kernel module Oops

[Mike O'Connor]

Hi All

Getting a module Oops, running latest stable master using the igb
ethernet driver. Kernel is 3.16.0 low-latency from Ubuntu.

Any one have any ideas ? Machine has been running fairly well for over a
year now.

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[29858685.043093] EtherCAT WARNING: Datagram ffff880176963cd8
(domain0-0-main) was SKIPPED 1 time.
[29858685.107043] EtherCAT 0: Domain 0: Working counter changed to 21/21.
[29859315.327796] br0: received packet on tap0 with own address as
source address
[29871096.565041] BUG: unable to handle kernel NULL pointer dereference
at 0000000000000084
[29871096.573349] IP: [<ffffffffc051d793>]
ecrt_slave_config_state+0x43/0x70 [ec_master]
[29871096.581278] PGD 15a94e067 PUD 17670d067 PMD 0
[29871096.586140] Oops: 0000 [#1] PREEMPT SMP
[29871096.590471] Modules linked in: ec_generic(OE) ec_master(OE) e1000e
bluetooth 6lowpan_iphc ip6table_filter ip6_tables ipt_MASQUERADE
iptable_nat nf_nat_ipv4 nf_nat xt_tcpudp nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter ip_tables
x_tables bridge stp llc dm_crypt gpio_ich coretemp kvm_intel kvm
crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul
glue_helper ablk_helper cryptd serio_raw lpc_ich i2c_ismt
ipmi_msghandler shpchp mac_hid w83627ehf hwmon_vid lp parport psmouse
ahci libahci igb dca ptp pps_core i2c_algo_bit [last unloaded: ec_master]
[29871096.644116] CPU: 1 PID: 9839 Comm: iod ethercat Tainted:
G           OE 3.16.0-77-lowlatency #99~14.04.1-Ubuntu
[29871096.654563] Hardware name: To be filled by O.E.M. To be filled by
O.E.M./To be filled by O.E.M., BIOS 5.6.5 11/27/2014
[29871096.665644] task: ffff880176417170 ti: ffff880078e74000 task.ti:
ffff880078e74000
[29871096.673468] RIP: 0010:[<ffffffffc051d793>]  [<ffffffffc051d793>]
ecrt_slave_config_state+0x43/0x70 [ec_master]
[29871096.683883] RSP: 0018:ffff880078e77dd8  EFLAGS: 00010206
[29871096.689541] RAX: 0000000000000003 RBX: 0000000000000001 RCX:
0000000000000000
[29871096.697046] RDX: 0000000000000000 RSI: ffff880078e77dfc RDI:
ffff88004e821000
[29871096.704574] RBP: ffff880078e77eb8 R08: 00000000c010a441 R09:
00007f117c0034e0
[29871096.712027] R10: 0000000000000001 R11: 0000000000000246 R12:
00007f1189ec9bd0
[29871096.719528] R13: ffff880079ef8000 R14: ffff880178019ae8 R15:
00007f1189ec9bd0
[29871096.727051] FS:  00007f1189eca700(0000) GS:ffff88017fc80000(0000)
knlGS:0000000000000000
[29871096.735525] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[29871096.741606] CR2: 0000000000000084 CR3: 0000000176a04000 CR4:
00000000001007e0
[29871096.749068] Stack:
[29871096.751363]  ffffffffc0512d58 ffff880078e77e10 ffffffff8109dfef
ffff880078af2300
[29871096.759213]  000000237fc93280 0000000000000002 00007f110000000a
00007f1189ec9c40
[29871096.767036]  00007f1189ec9c50 00007f1189ec9c40 0000000000013280
ffff880078e77fd8
[29871096.774903] Call Trace:
[29871096.777670]  [<ffffffffc0512d58>] ? ec_ioctl+0xaa8/0x2980 [ec_master]
[29871096.784451]  [<ffffffff8109dfef>] ? finish_task_switch+0x4f/0x150
[29871096.790869]  [<ffffffff810b929d>] ? remove_wait_queue+0x4d/0x60
[29871096.797150]  [<ffffffffc04fd228>] eccdev_ioctl+0x28/0x30 [ec_master]
[29871096.803865]  [<ffffffff811ee4a0>] do_vfs_ioctl+0x2e0/0x4c0
[29871096.809670]  [<ffffffff811f853e>] ? __fget+0x6e/0xb0
[29871096.814938]  [<ffffffff811ee701>] SyS_ioctl+0x81/0xa0
[29871096.820303]  [<ffffffff8177bb4d>] system_call_fastpath+0x1a/0x1f
[29871096.826631] Code: d0 a8 01 88 06 74 39 48 8b 57 28 31 c0 83 ba 84
00 00 00 08 74 32 8d 14 00 0f b6 06 5d 83 e0 fd 09 d0 88 06 48 8b 57 28
83 e0 c3 <8b> 92 84 00 00 00 83 e2 0f c1 e2 02 09 d0 88 06 c3 0f 1f 40 00
[29871096.847824] RIP  [<ffffffffc051d793>]
ecrt_slave_config_state+0x43/0x70 [ec_master]
[29871096.855875]  RSP <ffff880078e77dd8>
[29871096.859679] CR2: 0000000000000084
[29871096.863707] ---[ end trace e250b92ad1ea1875 ]---

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