Hi, I've experienced a few reboots lately, and filally got a crash kernel going to catch the cause. Not sure how this happens, but I got a NULL ptr derefenrece in the tipc nametable.
[72369.896602] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b7 [72369.896742] IP: [<ffffffffc044ef62>] tipc_nametbl_unsubscribe+0x72/0x100 [tipc] [72369.896851] PGD 0 [72369.896928] Oops: 0002 [#1] SMP [72369.897043] Modules linked in: tipc ip6_udp_tunnel udp_tunnel ip_vs nf_conntrack cls_fw sch_sfq sch_htb xt_CLASSIFY xt_multiport iptable_mangle ip_tables x_tables ipmi_devintf ipmi_ssif x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd sb_edac serio_raw edac_core input_leds joydev lpc_ich mei_me mei ioatdma dca ipmi_si shpchp 8250_fintek ipmi_msghandler mac_hid quota_v2 quota_tree lp parport autofs4 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid psmouse isci ahci libsas e1000e libahci scsi_transport_sas ptp pps_core wmi fjes [72369.900205] CPU: 0 PID: 4129 Comm: kworker/u24:2 Not tainted 4.4.0-14-generic #30-Ubuntu [72369.900271] Hardware name: Supermicro X9SRL-F/X9SRL-F, BIOS 3.2 01/16/2015 [72369.900325] Workqueue: tipc_rcv tipc_recv_work [tipc] [72369.900407] task: ffff880c43720dc0 ti: ffff8801ee78c000 task.ti: ffff8801ee78c000 [72369.900471] RIP: 0010:[<ffffffffc044ef62>] [<ffffffffc044ef62>] tipc_nametbl_unsubscribe+0x72/0x100 [tipc] [72369.900603] RSP: 0018:ffff880c4f203e10 EFLAGS: 00010246 [72369.900675] RAX: ffff8804648c2080 RBX: ffff8804648c2000 RCX: 00000000000000af [72369.900737] RDX: 0000000000000000 RSI: 00000000000000ce RDI: ffff880c34ab7998 [72369.900800] RBP: ffff880c4f203e30 R08: ffff880c4f216d40 R09: 0000000000000001 [72369.900883] R10: 0000000000000005 R11: 0000000000000000 R12: ffff880c34ab7960 [72369.900946] R13: ffff880c459df120 R14: ffff880c34ab7998 R15: ffff8804648c2000 [72369.901010] FS: 0000000000000000(0000) GS:ffff880c4f200000(0000) knlGS:0000000000000000 [72369.901089] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [72369.901159] CR2: 00000000000000b7 CR3: 0000000001e0a000 CR4: 00000000001406f0 [72369.901222] Stack: [72369.901276] ffff8804648c2000 ffff880c459de000 ffff880101613348 ffffffffc044dd90 [72369.901510] ffff880c4f203e50 ffffffffc044d77f ffff8804648c2000 ffff880101613340 [72369.901731] ffff880c4f203e78 ffffffffc044ddd5 ffff880c4f20dd00 ffff8804648c2030 [72369.901963] Call Trace: [72369.902019] <IRQ> [72369.902079] [<ffffffffc044dd90>] ? tipc_subscrb_shutdown_cb+0xc0/0xc0 [tipc] [72369.902195] [<ffffffffc044d77f>] tipc_subscrp_delete+0x2f/0x80 [tipc] [72369.902261] [<ffffffffc044ddd5>] tipc_subscrp_timeout+0x45/0x70 [tipc] [72369.902334] [<ffffffff810eb215>] call_timer_fn+0x35/0x120 [72369.902410] [<ffffffffc044dd90>] ? tipc_subscrb_shutdown_cb+0xc0/0xc0 [tipc] [72369.902475] [<ffffffff810ebbca>] run_timer_softirq+0x23a/0x2f0 [72369.902544] [<ffffffff81084851>] __do_softirq+0x101/0x290 [72369.902606] [<ffffffff81084b53>] irq_exit+0xa3/0xb0 [72369.902682] [<ffffffff8181f822>] smp_apic_timer_interrupt+0x42/0x50 [72369.902749] [<ffffffff8181dae2>] apic_timer_interrupt+0x82/0x90 [72369.902811] <EOI> [72369.902854] [<ffffffff8181c7a5>] ? _raw_spin_unlock_irqrestore+0x15/0x20 [72369.902982] [<ffffffff810ed23f>] mod_timer+0x10f/0x240 [72369.903046] [<ffffffffc044daa0>] tipc_subscrb_rcv_cb+0x1c0/0x390 [tipc] [72369.903112] [<ffffffffc045a262>] tipc_receive_from_sock+0xc2/0x120 [tipc] [72369.903192] [<ffffffffc0459f0b>] tipc_recv_work+0x2b/0x60 [tipc] [72369.903260] [<ffffffff81098eb2>] process_one_work+0x162/0x480 [72369.903322] [<ffffffff8109921b>] worker_thread+0x4b/0x4c0 [72369.903388] [<ffffffff810991d0>] ? process_one_work+0x480/0x480 [72369.903450] [<ffffffff810991d0>] ? process_one_work+0x480/0x480 [72369.903514] [<ffffffff8109f3e8>] kthread+0xd8/0xf0 [72369.903575] [<ffffffff8109f310>] ? kthread_create_on_node+0x1e0/0x1e0 [72369.903639] [<ffffffff8181d10f>] ret_from_fork+0x3f/0x70 [72369.903700] [<ffffffff8109f310>] ? kthread_create_on_node+0x1e0/0x1e0 [72369.903762] Code: ff ff 48 85 c0 74 56 4c 8d 70 38 49 89 c4 4c 89 f7 e8 03 d9 3c c1 48 8b 8b 80 00 00 00 48 8b 93 88 00 00 00 48 8d 83 80 00 00 00 <48> 89 51 08 48 89 0a 48 89 83 80 00 00 00 48 89 83 88 00 00 00 [72369.906299] RIP [<ffffffffc044ef62>] tipc_nametbl_unsubscribe+0x72/0x100 [tipc] [72369.906430] RSP <ffff880c4f203e10> [72369.906486] CR2: 00000000000000b7 ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785351&iu=/4140 _______________________________________________ tipc-discussion mailing list tipc-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tipc-discussion
