Hello, We have the same issue on our k8s cluster.
Description: ubuntu16.04.1 LTSx86_64 Release: 16.04.1 Kernel: 4.4.0-104-generic [19156101.592212] ------------[ cut here ]------------ [19156101.593103] kernel BUG at /build/linux-SwhOyu/linux-4.4.0/include/linux/fs.h:2582! [19156101.594385] invalid opcode: 0000 [#1] SMP [19156101.595083] Modules linked in: binfmt_misc af_packet_diag netlink_diag dccp_diag dccp tcp_diag udp_diag inet_diag unix_diag veth br_netfilter ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_set xt_mark ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_bitmap_port ip_set_hash_ipport ip_set dummy xt_comment xt_addrtype iptable_nat nf_nat_ipv4 nf_conntrack_ipv4 nf_defrag_ipv4 ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs xt_tcpudp bridge stp llc nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_filter ip_tables xt_conntrack x_tables nf_nat nf_conntrack aufs isofs ppdev crct10dif_pclmul parport_pc crc32_pclmul input_leds joydev ghash_clmulni_intel parport serio_raw ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr sunrpc iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov [19156101.606434] async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear aesni_intel aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd psmouse floppy [19156101.609129] CPU: 29 PID: 11388 Comm: heartbeat Not tainted 4.4.0-104-generic #127-Ubuntu [19156101.610384] Hardware name: Smdbmds KVM, BIOS seabios-1.9.1-qemu-project.org 04/01/2014 [19156101.611637] task: ffff880eb1f79e00 ti: ffff8809131a4000 task.ti: ffff8809131a4000 [19156101.612905] RIP: 0010:[<ffffffff812126ad>] [<ffffffff812126ad>] __fput+0x21d/0x220 [19156101.614188] RSP: 0018:ffff8809131a7e68 EFLAGS: 00010246 [19156101.614989] RAX: 0000000000000000 RBX: ffff880ef6915700 RCX: 0000000365fb1705 [19156101.616143] RDX: 0000000000000001 RSI: ffff880fff55a020 RDI: 0000000000000000 [19156101.617285] RBP: ffff8809131a7ea0 R08: 000000000001a020 R09: ffffffff811b591d [19156101.618422] R10: ffffea002b69b300 R11: ffff880ef6915710 R12: 0000000000000010 [19156101.619574] R13: ffff880ed152aef8 R14: ffff8800bba18aa0 R15: ffff880ed1513a40 [19156101.620785] FS: 000000c42085bc90(0000) GS:ffff880fff540000(0000) knlGS:0000000000000000 [19156101.622074] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [19156101.622921] CR2: 00007f508b166b04 CR3: 0000000e0981b000 CR4: 00000000003406e0 [19156101.624062] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [19156101.625210] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [19156101.626349] Stack: [19156101.626765] ffff880ed152aef8 ffff880ef6915710 ffff880eb1f79e00 ffffffff8210ad50 [19156101.628018] ffff880ef6915700 0000000000000000 ffff880eb1f7a4a0 ffff8809131a7eb0 [19156101.629305] ffffffff812126ee ffff8809131a7ef0 ffffffff8109f101 ffff880eb1f7a4d4 [19156101.630568] Call Trace: [19156101.631036] [<ffffffff812126ee>] ____fput+0xe/0x10 [19156101.631804] [<ffffffff8109f101>] task_work_run+0x81/0xa0 [19156101.632612] [<ffffffff81003242>] exit_to_usermode_loop+0xc2/0xd0 [19156101.633497] [<ffffffff81003c6e>] syscall_return_slowpath+0x4e/0x60 [19156101.634402] [<ffffffff818449d0>] int_ret_from_sys_call+0x25/0x8f [19156101.635285] Code: 0f 84 cf fe ff ff 48 8b 43 28 48 8b 80 80 00 00 00 48 85 c0 0f 84 bb fe ff ff 31 d2 48 89 de bf ff ff ff ff ff d0 e9 aa fe ff ff <0f> 0b 90 0f 1f 44 00 00 31 ff 48 87 3d 8a 6e fc 00 48 85 ff 74 [19156101.639244] RIP [<ffffffff812126ad>] __fput+0x21d/0x220 [19156101.640049] RSP <ffff8809131a7e68> crash> Does this issue exist on Ubuntu18.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1653498 Title: Server reboots every 4.1 weeks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1653498/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
