Experienced this on two systems lately, not sure if this might be stuff fixed in later kernels:
[7895979.774469] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [7895979.775472] IP: [<ffffffff81835b7b>] _raw_spin_lock_bh+0x1b/0x30 [7895979.776367] PGD 8e3e65067 PUD 900bfd067 PMD 0 [7895979.777249] Oops: 0002 [#1] SMP [7895979.778143] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink bluetooth nls_utf8 btrfs ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs binfmt_misc xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter xt_conntrack tipc ip6_udp_tunnel udp_tunnel cfg80211 ip_vs nf_conntrack cls_fw sch_sfq sch_htb xt_CLASSIFY xt_multiport iptable_mangle ip_tables x_tables nls_iso8859_1 quota_v2 quota_tree joydev input_leds intel_rapl x86_pkg_temp_thermal intel_powerclamp hid_generic usbhid igb coretemp kvm_intel hid ptp sb_edac pps_core edac_core kvm mei_me irqbypass shpchp crct10dif_pclmul crc32_pclmul 8250_fintek mei ioatdma ghash_clmulni_intel fjes acpi_power_meter mac_hid lpc_ich dca acpi_pad ipmi_ssif ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi [7895979.783106] ipmi_si ipmi_devintf ipmi_msghandler autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd ast i2c_algo_bit ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm ahci libahci wmi [7895979.786235] CPU: 10 PID: 16263 Comm: kworker/u66:4 Tainted: G W 4.4.0-53-generic #74-Ubuntu [7895979.787329] Hardware name: Supermicro Super Server/X10DRL-i, BIOS 1.1b 09/11/2015 [7895979.788441] Workqueue: tipc_rcv tipc_recv_work [tipc] [7895979.789519] task: ffff88107d92e040 ti: ffff8808c362c000 task.ti: ffff8808c362c000 [7895979.790609] RIP: 0010:[<ffffffff81835b7b>] [<ffffffff81835b7b>] _raw_spin_lock_bh+0x1b/0x30 [7895979.791708] RSP: 0018:ffff8808c362fcf0 EFLAGS: 00010246 [7895979.792807] RAX: 0000000000000000 RBX: ffff880859088e00 RCX: 0000000000000008 [7895979.793908] RDX: 0000000000000001 RSI: 0000000002080020 RDI: 0000000000000008 [7895979.795041] RBP: ffff8808c362fcf0 R08: ffff88105cc9a000 R09: ffffffff81ef4680 [7895979.796126] R10: ffff880859088e00 R11: 000000000000001c R12: 0000000000000000 [7895979.797206] R13: ffff881039efb520 R14: ffff88085b8c2000 R15: 0000000000000002 [7895979.798288] FS: 0000000000000000(0000) GS:ffff88105cc80000(0000) knlGS:0000000000000000 [7895979.799373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [7895979.800466] CR2: 0000000000000008 CR3: 00000009262ce000 CR4: 00000000001406e0 [7895979.801553] Stack: [7895979.802653] ffff8808c362fd38 ffffffffc045da7a ffff88085b8c2000 0000000000000008 [7895979.803758] 000000000000001c ffff8808aaf72300 ffff881039efb520 ffff8808550d7440 [7895979.804859] ffff8808c362fd58 ffff8808c362fdf0 ffffffffc046a392 ffff881039efb520 [7895979.805983] Call Trace: [7895979.807087] [<ffffffffc045da7a>] tipc_subscrb_rcv_cb+0x10a/0x390 [tipc] [7895979.808208] [<ffffffffc046a392>] tipc_receive_from_sock+0xc2/0x120 [tipc] [7895979.809332] [<ffffffffc046a03b>] tipc_recv_work+0x2b/0x60 [tipc] [7895979.810440] [<ffffffff8109a495>] process_one_work+0x165/0x480 [7895979.811554] [<ffffffff8109a7fb>] worker_thread+0x4b/0x4c0 [7895979.812623] [<ffffffff8109a7b0>] ? process_one_work+0x480/0x480 [7895979.813694] [<ffffffff810a09d8>] kthread+0xd8/0xf0 [7895979.814766] [<ffffffff810a0900>] ? kthread_create_on_node+0x1e0/0x1e0 [7895979.815842] [<ffffffff8183640f>] ret_from_fork+0x3f/0x70 [7895979.816919] [<ffffffff810a0900>] ? kthread_create_on_node+0x1e0/0x1e0 [7895979.818032] Code: b8 01 00 00 00 5d c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 65 81 05 df 77 7d 7e 00 02 00 00 48 89 e5 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 02 5d c3 89 c6 e8 34 50 89 ff 66 90 5d c3 [7895979.820374] RIP [<ffffffff81835b7b>] _raw_spin_lock_bh+0x1b/0x30 [7895979.821493] RSP <ffff8808c362fcf0> [7895979.822616] CR2: 0000000000000008 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ tipc-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/tipc-discussion
