Re: probably serious conntrack/netfilter panic, 4.8.14, timers and intel turbo

From: Denys Fedoryshchenko
Date: Fri Mar 31 2017 - 15:07:12 EST

I am not sure if it is same issue, but panics still happen, but much less. Same server, nat.
I will upgrade to latest 4.10.x build, because for this one i dont have files anymore (for symbols and etc).

[864288.511464] Modules linked in: nf_conntrack_netlink nf_nat_pptp nf_nat_proto_gre xt_TCPMSS xt_connmark ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_nat xt_rateest xt_RATEEST nf_conntrack_pptp nf_conntrack_proto_gre xt_CT xt_set xt_hl xt_tcpudp ip_set_hash_net ip_set nfnetlink iptable_raw iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables netconsole configfs 8021q garp mrp stp llc bonding ixgbe dca
[864288.512740] CPU: 17 PID: 0 Comm: swapper/17 Not tainted 4.10.1-build-0132 #2
[864288.513005] Hardware name: Intel Corporation S2600WTT/S2600WTT, BIOS SE5C610.86B.01.01.0019.101220160604 10/12/2016
[864288.513454] task: ffff881038cb6000 task.stack: ffffc9000c678000
[864288.513719] RIP: 0010:nf_nat_cleanup_conntrack+0xe2/0x1bc [nf_nat]
[864288.513980] RSP: 0018:ffff88103fc43ba0 EFLAGS: 00010206
[864288.514237] RAX: ffff140504021ad8 RBX: ffff881004021ad8 RCX: 0000000001000000
[864288.514677] RDX: ffff140504021ad8 RSI: ffff88103279628c RDI: ffff88103279628c
[864288.515117] RBP: ffff88103fc43be0 R08: ffffc9003b47b558 R09: 0000000000000004
[864288.515558] R10: ffff8820083d00ce R11: ffff881038480b00 R12: ffff881004021a40
[864288.515998] R13: 0000000000000000 R14: ffffffffa00d406e R15: ffffc90036e11000
[864288.516438] FS: 0000000000000000(0000) GS:ffff88103fc40000(0000) knlGS:0000000000000000
[864288.516882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[864288.517142] CR2: 00007fbfc303f978 CR3: 000000202267c000 CR4: 00000000001406e0
[864288.517580] Call Trace:
[864288.517831] <IRQ>
[864288.518090] __nf_ct_ext_destroy+0x3f/0x57 [nf_conntrack]
[864288.518352] nf_conntrack_free+0x25/0x55 [nf_conntrack]
[864288.518615] destroy_conntrack+0x80/0x8c [nf_conntrack]
[864288.518880] nf_conntrack_destroy+0x19/0x1b
[864288.519137] nf_ct_gc_expired+0x6e/0x71 [nf_conntrack]
[864288.519400] __nf_conntrack_find_get+0x89/0x2ab [nf_conntrack]
[864288.519663] nf_conntrack_in+0x1ec/0x877 [nf_conntrack]
[864288.519925] ipv4_conntrack_in+0x1c/0x1e [nf_conntrack_ipv4]
[864288.520185] nf_hook_slow+0x2a/0x9a
[864288.520439] ip_rcv+0x318/0x337
[864288.520692] ? ip_local_deliver_finish+0x1ba/0x1ba
[864288.520953] __netif_receive_skb_core+0x607/0x852
[864288.521213] ? kmem_cache_free_bulk+0x232/0x274
[864288.521471] __netif_receive_skb+0x18/0x5a
[864288.521727] process_backlog+0x90/0x113
[864288.521981] net_rx_action+0x114/0x2dc
[864288.522238] ? sched_clock_cpu+0x15/0x94
[864288.522496] __do_softirq+0xe7/0x259
[864288.522753] irq_exit+0x52/0x93
[864288.523006] smp_call_function_single_interrupt+0x33/0x35
[864288.523267] call_function_single_interrupt+0x83/0x90
[864288.523531] RIP: 0010:mwait_idle+0x9e/0x125
[864288.523786] RSP: 0018:ffffc9000c67beb0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff04
[864288.524229] RAX: 0000000000000000 RBX: ffff881038cb6000 RCX: 0000000000000000
[864288.524669] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[864288.525110] RBP: ffffc9000c67bec0 R08: 0000000000000001 R09: 0000000000000000
[864288.525551] R10: ffffc9000c67be50 R11: 0000000000000000 R12: 0000000000000011
[864288.525991] R13: 0000000000000000 R14: ffff881038cb6000 R15: ffff881038cb6000
[864288.526429] </IRQ>
[864288.526682] arch_cpu_idle+0xf/0x11
[864288.526937] default_idle_call+0x25/0x27
[864288.527193] do_idle+0xb6/0x15d
[864288.527446] cpu_startup_entry+0x1f/0x21
[864288.527702] start_secondary+0xe8/0xeb
[864288.527961] start_cpu+0x14/0x14
[864288.528212] Code: 48 89 f7 48 89 75 c8 e8 6e e8 8f e1 8b 45 c4 48 8b 75 c8 48 83 c0 08 4d 8d 04 c7 49 8b 04 c7 a8 01 75 46 48 39 c3 74 1e 48 89 c2 <48> 8b 7a 08 48 85 ff 0f 84 b3 00 00 00 48 39 fb 0f 84 9e 00 00
[864288.528905] RIP: nf_nat_cleanup_conntrack+0xe2/0x1bc [nf_nat] RSP: ffff88103fc43ba0
[864288.529362] ---[ end trace e3c40a5e4bf43e26 ]---
[864288.567835] Kernel panic - not syncing: Fatal exception in interrupt
[864288.568122] Kernel Offset: disabled
[864288.587619] Rebooting in 5 seconds..