Public bug reported:
------------[ cut here ]------------
WARNING: CPU: 13 PID: 0 at
/build/linux-0XAgc4/linux-4.4.0/net/ipv4/tcp_output.c:1145
tcp_fragment+0x34d/0x370()
Modules linked in: ip6table_filter ipip tunnel4 ip_tunnel cpuid 8021q garp mrp
stp llc ip6_tables binfmt_misc xt_comment nf_log_ipv4 nf_log_common xt_LOG
xt_limit xt_tcpudp xt_addrtype iptable_filt
iptable_raw ip_tables x_tables intel_rapl x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel aesni_intel ipmi_ssif aes_x86_64
_helper ablk_helper hpilo cryptd serio_raw sb_edac edac_core ioatdma lpc_ich
shpchp 8250_fintek mac_hid acpi_power_meter ipmi_si ipmi_devintf
ipmi_msghandler autofs4 raid10 raid456 async_raid6_reco
ync_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
ixgbe dca vxlan ip6_udp_tunnel udp_tunnel ptp ahci pps_core psmouse libahci
mdio wmi fjes [last unloaded: nf_conntrack]
CPU: 13 PID: 0 Comm: swapper/13 Not tainted 4.4.0-78-generic #99-Ubuntu
0000000000000286 24b314fc942cf971 ffff88105f3439a8 ffffffff813f8dd3
0000000000000000 ffffffff81d71d78 ffff88105f3439e0 ffffffff81081302
ffff88088a1c5000 ffff880cc988f800 000000000000004b 0000000000000000
Call Trace:
<IRQ> [<ffffffff813f8dd3>] dump_stack+0x63/0x90
[<ffffffff81081302>] warn_slowpath_common+0x82/0xc0
[<ffffffff8108144a>] warn_slowpath_null+0x1a/0x20
[<ffffffff817903ad>] tcp_fragment+0x34d/0x370
[<ffffffff81785b7f>] tcp_mark_head_lost+0x14f/0x240
[<ffffffff8178692c>] tcp_update_scoreboard+0x4c/0x70
[<ffffffff8178c3d2>] tcp_fastretrans_alert+0x6f2/0xaa0
[<ffffffff8178cbeb>] tcp_ack+0x46b/0x800
[<ffffffff8178da39>] tcp_rcv_established+0x1d9/0x780
[<ffffffff8174c232>] ? sk_filter_trim_cap+0x42/0x160
[<ffffffff81798a05>] tcp_v4_do_rcv+0x145/0x200
[<ffffffff81799bf2>] tcp_v4_rcv+0x872/0xa20
[<ffffffffc02290c7>] ? iptable_filter_hook+0x27/0x56 [iptable_filter]
[<ffffffff8176c172>] ? nf_iterate+0x62/0x80
[<ffffffff81773504>] ip_local_deliver_finish+0x94/0x1e0
[<ffffffff8177380f>] ip_local_deliver+0x6f/0xe0
[<ffffffff81773470>] ? ip_rcv_finish+0x320/0x320
[<ffffffff817731e2>] ip_rcv_finish+0x92/0x320
[<ffffffff81773b11>] ip_rcv+0x291/0x3a0
[<ffffffff81773150>] ? inet_del_offload+0x40/0x40
[<ffffffff817357a4>] __netif_receive_skb_core+0x704/0xa60
[<ffffffff8179ec00>] ? tcp4_gro_receive+0x130/0x1d0
[<ffffffff81735b18>] __netif_receive_skb+0x18/0x60
[<ffffffff81735b92>] netif_receive_skb_internal+0x32/0xa0
[<ffffffff81736813>] napi_gro_receive+0xc3/0x120
[<ffffffffc02b8dfa>] gro_cell_poll+0x5a/0x90 [ip_tunnel]
[<ffffffff8173605e>] net_rx_action+0x21e/0x360
[<ffffffff81085de1>] __do_softirq+0x101/0x290
[<ffffffff810860e3>] irq_exit+0xa3/0xb0
[<ffffffff81050e13>] smp_call_function_single_interrupt+0x33/0x40
[<ffffffff81841e62>] call_function_single_interrupt+0x82/0x90
<EOI> [<ffffffff816d4131>] ? cpuidle_enter_state+0x111/0x2b0
[<ffffffff816d4307>] cpuidle_enter+0x17/0x20
[<ffffffff810c4592>] call_cpuidle+0x32/0x60
[<ffffffff816d42e3>] ? cpuidle_select+0x13/0x20
[<ffffffff810c4850>] cpu_startup_entry+0x290/0x350
[<ffffffff810517c4>] start_secondary+0x154/0x190
---[ end trace f0d076c2d7e8bb40 ]---
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: xenial
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https://bugs.launchpad.net/bugs/1698241
Title:
WARNING: CPU: 13 PID: 0 at /build/linux-
0XAgc4/linux-4.4.0/net/ipv4/tcp_output.c:1145
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