[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   20.144196] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   27.394951] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   27.742738] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available)
[   28.368025] random: sshd: uninitialized urandom read (32 bytes read, 69 bits of entropy available)
[   82.785925] random: sshd: uninitialized urandom read (32 bytes read, 91 bits of entropy available)
Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts.
[   88.325268] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available)
2018/08/04 01:32:54 parsed 1 programs
[   89.839649] random: cc1: uninitialized urandom read (8 bytes read, 97 bits of entropy available)
2018/08/04 01:32:56 executed programs: 0
[   91.246033] IPVS: Creating netns size=2552 id=1
[   91.477533] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready
[   91.493677] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready
[   91.572353] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready
[   91.586672] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready
[   91.666324] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready
[   91.681043] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready
[   91.697542] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready
[   91.712860] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready
[   92.412953] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
[   92.449428] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   93.614854] 
[   93.616507] ===============================
[   93.620804] [ INFO: suspicious RCU usage. ]
[   93.625118] 4.4.145-g2241aa9 #14 Not tainted
[   93.629503] -------------------------------
[   93.633817] kernel/rcu/tree_plugin.h:685 Illegal synchronize_rcu() in RCU read-side critical section!
[   93.643162] 
[   93.643162] other info that might help us debug this:
[   93.643162] 
[   93.651297] 
[   93.651297] rcu_scheduler_active = 1, debug_locks = 0
[   93.657944] 2 locks held by syz-executor0/4259:
[   93.662597]  #0:  (rcu_read_lock_bh){......}, at: [<ffffffff8342edc5>] ip6_finish_output2+0x1d5/0x1ca0
[   93.672649]  #1:  (&n->lock){++--..}, at: [<ffffffff82fa767f>] __neigh_event_send+0x2f/0xc50
[   93.681825] 
[   93.681825] stack backtrace:
[   93.686305] CPU: 1 PID: 4259 Comm: syz-executor0 Not tainted 4.4.145-g2241aa9 #14
[   93.693898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   93.703233]  0000000000000000 a0203bce96f7a772 ffff8800b8dff000 ffffffff81e123cd
[   93.711217]  ffff8801d482e000 0000000000000000 0000000000000001 ffffffff83a68200
[   93.719203]  ffff8801da2d52d8 ffff8800b8dff030 ffffffff81410687 ffff8801da2d5180
[   93.727190] Call Trace:
[   93.729753]  [<ffffffff81e123cd>] dump_stack+0xc1/0x124
[   93.735090]  [<ffffffff81410687>] lockdep_rcu_suspicious.cold.47+0x110/0x141
[   93.742261]  [<ffffffff81283cf8>] synchronize_rcu+0x78/0xa0
[   93.747946]  [<ffffffff835a4dba>] __l2tp_session_unhash+0x38a/0x520
[   93.754332]  [<ffffffff835a4bdc>] ? __l2tp_session_unhash+0x1ac/0x520
[   93.760897]  [<ffffffff835a9180>] ? l2tp_udp_encap_recv+0xa40/0xa40
[   93.767280]  [<ffffffff835a511b>] l2tp_tunnel_closeall+0x1cb/0x350
[   93.773572]  [<ffffffff835a59f2>] l2tp_tunnel_destruct+0x2f2/0x590
[   93.779863]  [<ffffffff835a58aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   93.786329]  [<ffffffff835a5700>] ? l2tp_tunnel_del_work+0x460/0x460
[   93.792803]  [<ffffffff82fa7ca2>] ? __neigh_event_send+0x652/0xc50
[   93.799092]  [<ffffffff82f33f1c>] sk_destruct+0x4c/0x4c0
[   93.804513]  [<ffffffff82f343df>] __sk_free+0x4f/0x220
[   93.809762]  [<ffffffff82f36373>] sock_wfree+0x103/0x140
[   93.815191]  [<ffffffff82f36270>] ? sk_receive_skb+0x950/0x950
[   93.821133]  [<ffffffff82f39ff3>] skb_release_head_state+0x103/0x210
[   93.827599]  [<ffffffff82f3bed5>] skb_release_all+0x15/0x60
[   93.833282]  [<ffffffff82f3bf35>] __kfree_skb+0x15/0x20
[   93.838626]  [<ffffffff82f3c037>] kfree_skb+0xf7/0x3e0
[   93.843888]  [<ffffffff82fa7ca2>] __neigh_event_send+0x652/0xc50
[   93.850005]  [<ffffffff82fad5bb>] neigh_resolve_output+0x4eb/0x790
[   93.856296]  [<ffffffff81e71efb>] ? check_preemption_disabled+0x3b/0x170
[   93.863110]  [<ffffffff81281ee2>] ? rcu_lockdep_current_cpu_online+0xf2/0x140
[   93.870355]  [<ffffffff8342f519>] ip6_finish_output2+0x929/0x1ca0
[   93.876560]  [<ffffffff8342edc5>] ? ip6_finish_output2+0x1d5/0x1ca0
[   93.882940]  [<ffffffff8342ebf0>] ? ip6_sk_dst_lookup_flow+0x580/0x580
[   93.889581]  [<ffffffff834696a7>] ? ip6_mtu+0x217/0x340
[   93.894918]  [<ffffffff83438b58>] ip6_finish_output+0x3b8/0x760
[   93.900952]  [<ffffffff834390b8>] ip6_output+0x1b8/0x520
[   93.906384]  [<ffffffff83438f00>] ? ip6_finish_output+0x760/0x760
[   93.912588]  [<ffffffff834387a0>] ? ip6_fragment+0x3510/0x3510
[   93.918642]  [<ffffffff83466852>] ? rt6_check_expired+0xa2/0x120
[   93.924759]  [<ffffffff8356280b>] ip6_local_out+0x9b/0x180
[   93.930353]  [<ffffffff8343b0f1>] ip6_send_skb+0xa1/0x340
[   93.935866]  [<ffffffff838b4d5b>] ? csum_ipv6_magic+0x2b/0x90
[   93.941722]  [<ffffffff83496f9a>] udp_v6_send_skb+0x5ba/0xe70
[   93.947580]  [<ffffffff8349c93e>] udpv6_sendmsg+0x1f2e/0x24c0
[   93.953438]  [<ffffffff83216e50>] ? ip_reply_glue_bits+0xc0/0xc0
[   93.959553]  [<ffffffff8349aa10>] ? udp6_lib_lookup2+0x990/0x990
[   93.965674]  [<ffffffff812312c0>] ? debug_check_no_locks_freed+0x210/0x210
[   93.972662]  [<ffffffff81c72171>] ? sock_has_perm+0x1c1/0x400
[   93.978522]  [<ffffffff81c7224f>] ? sock_has_perm+0x29f/0x400
[   93.984384]  [<ffffffff81c7204f>] ? sock_has_perm+0x9f/0x400
[   93.990165]  [<ffffffff833063f3>] ? inet_sendmsg+0x143/0x4d0
[   93.995935]  [<ffffffff833064b3>] inet_sendmsg+0x203/0x4d0
[   94.001537]  [<ffffffff83306323>] ? inet_sendmsg+0x73/0x4d0
[   94.007221]  [<ffffffff833062b0>] ? inet_recvmsg+0x4c0/0x4c0
[   94.012994]  [<ffffffff82f22e1c>] sock_sendmsg+0xcc/0x110
[   94.018503]  [<ffffffff82f245e1>] ___sys_sendmsg+0x441/0x880
[   94.024276]  [<ffffffff812cbf05>] ? hash_futex+0x15/0x210
[   94.029785]  [<ffffffff82f241a0>] ? copy_msghdr_from_user+0x550/0x550
[   94.036338]  [<ffffffff812ce990>] ? get_futex_key+0xdc0/0xdc0
[   94.042198]  [<ffffffff82f30536>] ? release_sock+0x3b6/0x500
[   94.047972]  [<ffffffff812d2b6d>] ? do_futex+0x12d/0x17f0
[   94.053484]  [<ffffffff835a9b00>] ? pppol2tp_recv+0x320/0x320
[   94.059341]  [<ffffffff81279747>] ? debug_lockdep_rcu_enabled+0x77/0x90
[   94.066066]  [<ffffffff8157b15f>] ? __fget_light+0x9f/0x1f0
[   94.071748]  [<ffffffff8157b2c8>] ? __fdget+0x18/0x20
[   94.076908]  [<ffffffff82f1fd46>] ? sockfd_lookup_light+0xb6/0x160
[   94.083198]  [<ffffffff82f26c64>] __sys_sendmmsg+0x1d4/0x2e0
[   94.088969]  [<ffffffff82f26a90>] ? SyS_sendmsg+0x50/0x50
[   94.094483]  [<ffffffff81c5331f>] ? security_socket_connect+0x8f/0xc0
[   94.101043]  [<ffffffff82f2380a>] ? SYSC_connect+0x22a/0x300
[   94.106816]  [<ffffffff82f235e0>] ? SYSC_bind+0x280/0x280
[   94.112327]  [<ffffffff812d4d41>] ? compat_SyS_futex+0x1e1/0x2f0
[   94.118442]  [<ffffffff812d4b60>] ? compat_SyS_get_robust_list+0x310/0x310
[   94.125427]  [<ffffffff83010662>] compat_SyS_sendmmsg+0x32/0x40
[   94.131455]  [<ffffffff83010630>] ? compat_SyS_sendmsg+0x40/0x40
[   94.137575]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   94.143693]  [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a
[   94.149752] BUG: sleeping function called from invalid context at kernel/sched/completion.c:90
[   94.158491] in_atomic(): 1, irqs_disabled(): 0, pid: 4259, name: syz-executor0
[   94.165844] INFO: lockdep is turned off.
[   94.169886] Preemption disabled at:[<ffffffff83438b58>] ip6_finish_output+0x3b8/0x760
[   94.177984] 
[   94.179588] CPU: 1 PID: 4259 Comm: syz-executor0 Not tainted 4.4.145-g2241aa9 #14
[   94.187178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.196503]  0000000000000000 a0203bce96f7a772 ffff8800b8dfed80 ffffffff81e123cd
[   94.204491]  ffff8801d482e000 0000000000000000 ffff8801d482e000 000000000000005a
[   94.212473]  ffff8801d482e000 ffff8800b8dfedb8 ffffffff8140e7a5 ffff8801d482e000
[   94.220464] Call Trace:
[   94.223029]  [<ffffffff81e123cd>] dump_stack+0xc1/0x124
[   94.228370]  [<ffffffff8140e7a5>] ___might_sleep.cold.116+0x1bd/0x1d3
[   94.234928]  [<ffffffff811a69f0>] __might_sleep+0x90/0x1a0
[   94.240529]  [<ffffffff838c7a75>] ? _raw_spin_unlock_irqrestore+0x45/0x70
[   94.247427]  [<ffffffff838bd479>] wait_for_completion+0x89/0x2e0
[   94.253547]  [<ffffffff81e71efb>] ? check_preemption_disabled+0x3b/0x170
[   94.260360]  [<ffffffff838bd3f0>] ? wait_for_completion_interruptible+0x460/0x460
[   94.267958]  [<ffffffff81230d5d>] ? trace_hardirqs_on+0xd/0x10
[   94.273900]  [<ffffffff812795f7>] __wait_rcu_gp+0x137/0x1b0
[   94.279584]  [<ffffffff81281cf4>] synchronize_rcu.part.55+0x94/0xd0
[   94.285962]  [<ffffffff81281c60>] ? synchronize_rcu_bh.part.54+0xd0/0xd0
[   94.292773]  [<ffffffff812874b0>] ? __call_rcu.constprop.66+0x930/0x930
[   94.299498]  [<ffffffff81279490>] ? trace_raw_output_rcu_utilization+0x150/0x150
[   94.307006]  [<ffffffff81410687>] ? lockdep_rcu_suspicious.cold.47+0x110/0x141
[   94.314336]  [<ffffffff81283cb7>] synchronize_rcu+0x37/0xa0
[   94.320018]  [<ffffffff835a4dba>] __l2tp_session_unhash+0x38a/0x520
[   94.326395]  [<ffffffff835a4bdc>] ? __l2tp_session_unhash+0x1ac/0x520
[   94.332945]  [<ffffffff835a9180>] ? l2tp_udp_encap_recv+0xa40/0xa40
[   94.339332]  [<ffffffff835a511b>] l2tp_tunnel_closeall+0x1cb/0x350
[   94.345623]  [<ffffffff835a59f2>] l2tp_tunnel_destruct+0x2f2/0x590
[   94.351923]  [<ffffffff835a58aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   94.358395]  [<ffffffff835a5700>] ? l2tp_tunnel_del_work+0x460/0x460
[   94.364874]  [<ffffffff82fa7ca2>] ? __neigh_event_send+0x652/0xc50
[   94.371177]  [<ffffffff82f33f1c>] sk_destruct+0x4c/0x4c0
[   94.376602]  [<ffffffff82f343df>] __sk_free+0x4f/0x220
[   94.381852]  [<ffffffff82f36373>] sock_wfree+0x103/0x140
[   94.387294]  [<ffffffff82f36270>] ? sk_receive_skb+0x950/0x950
[   94.393249]  [<ffffffff82f39ff3>] skb_release_head_state+0x103/0x210
[   94.399712]  [<ffffffff82f3bed5>] skb_release_all+0x15/0x60
[   94.405396]  [<ffffffff82f3bf35>] __kfree_skb+0x15/0x20
[   94.410730]  [<ffffffff82f3c037>] kfree_skb+0xf7/0x3e0
[   94.415985]  [<ffffffff82fa7ca2>] __neigh_event_send+0x652/0xc50
[   94.422115]  [<ffffffff82fad5bb>] neigh_resolve_output+0x4eb/0x790
[   94.428409]  [<ffffffff81e71efb>] ? check_preemption_disabled+0x3b/0x170
[   94.435221]  [<ffffffff81281ee2>] ? rcu_lockdep_current_cpu_online+0xf2/0x140
[   94.442469]  [<ffffffff8342f519>] ip6_finish_output2+0x929/0x1ca0
[   94.448674]  [<ffffffff8342edc5>] ? ip6_finish_output2+0x1d5/0x1ca0
[   94.455052]  [<ffffffff8342ebf0>] ? ip6_sk_dst_lookup_flow+0x580/0x580
[   94.461692]  [<ffffffff834696a7>] ? ip6_mtu+0x217/0x340
[   94.467026]  [<ffffffff83438b58>] ip6_finish_output+0x3b8/0x760
[   94.473060]  [<ffffffff834390b8>] ip6_output+0x1b8/0x520
[   94.478485]  [<ffffffff83438f00>] ? ip6_finish_output+0x760/0x760
[   94.484691]  [<ffffffff834387a0>] ? ip6_fragment+0x3510/0x3510
[   94.490645]  [<ffffffff83466852>] ? rt6_check_expired+0xa2/0x120
[   94.496768]  [<ffffffff8356280b>] ip6_local_out+0x9b/0x180
[   94.502367]  [<ffffffff8343b0f1>] ip6_send_skb+0xa1/0x340
[   94.507888]  [<ffffffff838b4d5b>] ? csum_ipv6_magic+0x2b/0x90
[   94.513747]  [<ffffffff83496f9a>] udp_v6_send_skb+0x5ba/0xe70
[   94.519606]  [<ffffffff8349c93e>] udpv6_sendmsg+0x1f2e/0x24c0
[   94.525463]  [<ffffffff83216e50>] ? ip_reply_glue_bits+0xc0/0xc0
[   94.531581]  [<ffffffff8349aa10>] ? udp6_lib_lookup2+0x990/0x990
[   94.537702]  [<ffffffff812312c0>] ? debug_check_no_locks_freed+0x210/0x210
[   94.544691]  [<ffffffff81c72171>] ? sock_has_perm+0x1c1/0x400
[   94.550551]  [<ffffffff81c7224f>] ? sock_has_perm+0x29f/0x400
[   94.556415]  [<ffffffff81c7204f>] ? sock_has_perm+0x9f/0x400
[   94.562189]  [<ffffffff833063f3>] ? inet_sendmsg+0x143/0x4d0
[   94.567969]  [<ffffffff833064b3>] inet_sendmsg+0x203/0x4d0
[   94.573564]  [<ffffffff83306323>] ? inet_sendmsg+0x73/0x4d0
[   94.579246]  [<ffffffff833062b0>] ? inet_recvmsg+0x4c0/0x4c0
[   94.585019]  [<ffffffff82f22e1c>] sock_sendmsg+0xcc/0x110
[   94.590530]  [<ffffffff82f245e1>] ___sys_sendmsg+0x441/0x880
[   94.596300]  [<ffffffff812cbf05>] ? hash_futex+0x15/0x210
[   94.601819]  [<ffffffff82f241a0>] ? copy_msghdr_from_user+0x550/0x550
[   94.608370]  [<ffffffff812ce990>] ? get_futex_key+0xdc0/0xdc0
[   94.614227]  [<ffffffff82f30536>] ? release_sock+0x3b6/0x500
[   94.619995]  [<ffffffff812d2b6d>] ? do_futex+0x12d/0x17f0
[   94.625508]  [<ffffffff835a9b00>] ? pppol2tp_recv+0x320/0x320
[   94.631366]  [<ffffffff81279747>] ? debug_lockdep_rcu_enabled+0x77/0x90
[   94.638092]  [<ffffffff8157b15f>] ? __fget_light+0x9f/0x1f0
[   94.643778]  [<ffffffff8157b2c8>] ? __fdget+0x18/0x20
[   94.648939]  [<ffffffff82f1fd46>] ? sockfd_lookup_light+0xb6/0x160
[   94.655230]  [<ffffffff82f26c64>] __sys_sendmmsg+0x1d4/0x2e0
[   94.660999]  [<ffffffff82f26a90>] ? SyS_sendmsg+0x50/0x50
[   94.666512]  [<ffffffff81c5331f>] ? security_socket_connect+0x8f/0xc0
[   94.673064]  [<ffffffff82f2380a>] ? SYSC_connect+0x22a/0x300
[   94.678832]  [<ffffffff82f235e0>] ? SYSC_bind+0x280/0x280
[   94.684345]  [<ffffffff812d4d41>] ? compat_SyS_futex+0x1e1/0x2f0
[   94.690464]  [<ffffffff812d4b60>] ? compat_SyS_get_robust_list+0x310/0x310
[   94.697453]  [<ffffffff83010662>] compat_SyS_sendmmsg+0x32/0x40
[   94.703490]  [<ffffffff83010630>] ? compat_SyS_sendmsg+0x40/0x40
[   94.709610]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   94.715825]  [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a
[   94.721892] BUG: scheduling while atomic: syz-executor0/4259/0x00000402
[   94.728612] INFO: lockdep is turned off.
[   94.732654] Modules linked in:
[   94.735937] Preemption disabled at:[<ffffffff83438b58>] ip6_finish_output+0x3b8/0x760
[   94.744017] 
[   94.745624] CPU: 1 PID: 4259 Comm: syz-executor0 Not tainted 4.4.145-g2241aa9 #14
[   94.753302] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.762627]  0000000000000000 a0203bce96f7a772 ffff8800b8dfebd8 ffffffff81e123cd
[   94.770614]  ffff8801d482e000 0000000000000402 000000000001f540 0000000000000000
[   94.778603]  0000000000000001 ffff8800b8dfebf8 ffffffff8140e899 ffff8801db31f540
[   94.786590] Call Trace:
[   94.789150]  [<ffffffff81e123cd>] dump_stack+0xc1/0x124
[   94.794488]  [<ffffffff8140e899>] __schedule_bug.cold.117+0xde/0x100
[   94.800958]  [<ffffffff838b973f>] __schedule+0x11ff/0x1d70
[   94.806561]  [<ffffffff81015cd4>] ? dump_trace+0x184/0x360
[   94.812156]  [<ffffffff838ba4aa>] schedule+0x7a/0x1b0
[   94.817317]  [<ffffffff838c58c1>] schedule_timeout+0x481/0x8b0
[   94.823264]  [<ffffffff838c5440>] ? usleep_range+0x140/0x140
[   94.829034]  [<ffffffff81e12407>] ? dump_stack+0xfb/0x124
[   94.834545]  [<ffffffff838bd481>] ? wait_for_completion+0x91/0x2e0
[   94.840839]  [<ffffffff8140e7a5>] ? ___might_sleep.cold.116+0x1bd/0x1d3
[   94.847567]  [<ffffffff838bd5e6>] ? wait_for_completion+0x1f6/0x2e0
[   94.853947]  [<ffffffff838bd5ee>] wait_for_completion+0x1fe/0x2e0
[   94.860152]  [<ffffffff838bd3f0>] ? wait_for_completion_interruptible+0x460/0x460
[   94.867744]  [<ffffffff811c27e0>] ? wake_up_process+0x20/0x20
[   94.873603]  [<ffffffff812795f7>] __wait_rcu_gp+0x137/0x1b0
[   94.879290]  [<ffffffff81281cf4>] synchronize_rcu.part.55+0x94/0xd0
[   94.885668]  [<ffffffff81281c60>] ? synchronize_rcu_bh.part.54+0xd0/0xd0
[   94.892487]  [<ffffffff812874b0>] ? __call_rcu.constprop.66+0x930/0x930
[   94.899212]  [<ffffffff81279490>] ? trace_raw_output_rcu_utilization+0x150/0x150
[   94.906725]  [<ffffffff81410687>] ? lockdep_rcu_suspicious.cold.47+0x110/0x141
[   94.914059]  [<ffffffff81283cb7>] synchronize_rcu+0x37/0xa0
[   94.919745]  [<ffffffff835a4dba>] __l2tp_session_unhash+0x38a/0x520
[   94.926123]  [<ffffffff835a4bdc>] ? __l2tp_session_unhash+0x1ac/0x520
[   94.932674]  [<ffffffff835a9180>] ? l2tp_udp_encap_recv+0xa40/0xa40
[   94.939050]  [<ffffffff835a511b>] l2tp_tunnel_closeall+0x1cb/0x350
[   94.945340]  [<ffffffff835a59f2>] l2tp_tunnel_destruct+0x2f2/0x590
[   94.951635]  [<ffffffff835a58aa>] ? l2tp_tunnel_destruct+0x1aa/0x590
[   94.958099]  [<ffffffff835a5700>] ? l2tp_tunnel_del_work+0x460/0x460
[   94.964564]  [<ffffffff82fa7ca2>] ? __neigh_event_send+0x652/0xc50
[   94.970856]  [<ffffffff82f33f1c>] sk_destruct+0x4c/0x4c0
[   94.976278]  [<ffffffff82f343df>] __sk_free+0x4f/0x220
[   94.981527]  [<ffffffff82f36373>] sock_wfree+0x103/0x140
[   94.986968]  [<ffffffff82f36270>] ? sk_receive_skb+0x950/0x950
[   94.992912]  [<ffffffff82f39ff3>] skb_release_head_state+0x103/0x210
[   94.999374]  [<ffffffff82f3bed5>] skb_release_all+0x15/0x60
[   95.005056]  [<ffffffff82f3bf35>] __kfree_skb+0x15/0x20
[   95.010399]  [<ffffffff82f3c037>] kfree_skb+0xf7/0x3e0
[   95.015651]  [<ffffffff82fa7ca2>] __neigh_event_send+0x652/0xc50
[   95.021772]  [<ffffffff82fad5bb>] neigh_resolve_output+0x4eb/0x790
[   95.028073]  [<ffffffff81e71efb>] ? check_preemption_disabled+0x3b/0x170
[   95.034888]  [<ffffffff81281ee2>] ? rcu_lockdep_current_cpu_online+0xf2/0x140
[   95.042136]  [<ffffffff8342f519>] ip6_finish_output2+0x929/0x1ca0
[   95.048339]  [<ffffffff8342edc5>] ? ip6_finish_output2+0x1d5/0x1ca0
[   95.054717]  [<ffffffff8342ebf0>] ? ip6_sk_dst_lookup_flow+0x580/0x580
[   95.061365]  [<ffffffff834696a7>] ? ip6_mtu+0x217/0x340
[   95.066702]  [<ffffffff83438b58>] ip6_finish_output+0x3b8/0x760
[   95.072733]  [<ffffffff834390b8>] ip6_output+0x1b8/0x520
[   95.078159]  [<ffffffff83438f00>] ? ip6_finish_output+0x760/0x760
[   95.084538]  [<ffffffff834387a0>] ? ip6_fragment+0x3510/0x3510
[   95.090490]  [<ffffffff83466852>] ? rt6_check_expired+0xa2/0x120
[   95.096609]  [<ffffffff8356280b>] ip6_local_out+0x9b/0x180
[   95.102203]  [<ffffffff8343b0f1>] ip6_send_skb+0xa1/0x340
[   95.107711]  [<ffffffff838b4d5b>] ? csum_ipv6_magic+0x2b/0x90
[   95.113568]  [<ffffffff83496f9a>] udp_v6_send_skb+0x5ba/0xe70
[   95.119423]  [<ffffffff8349c93e>] udpv6_sendmsg+0x1f2e/0x24c0
[   95.125281]  [<ffffffff83216e50>] ? ip_reply_glue_bits+0xc0/0xc0
[   95.131398]  [<ffffffff8349aa10>] ? udp6_lib_lookup2+0x990/0x990
[   95.137517]  [<ffffffff812312c0>] ? debug_check_no_locks_freed+0x210/0x210
[   95.144505]  [<ffffffff81c72171>] ? sock_has_perm+0x1c1/0x400
[   95.150363]  [<ffffffff81c7224f>] ? sock_has_perm+0x29f/0x400
[   95.156223]  [<ffffffff81c7204f>] ? sock_has_perm+0x9f/0x400
[   95.161998]  [<ffffffff833063f3>] ? inet_sendmsg+0x143/0x4d0
[   95.167770]  [<ffffffff833064b3>] inet_sendmsg+0x203/0x4d0
[   95.173369]  [<ffffffff83306323>] ? inet_sendmsg+0x73/0x4d0
[   95.179056]  [<ffffffff833062b0>] ? inet_recvmsg+0x4c0/0x4c0
[   95.184828]  [<ffffffff82f22e1c>] sock_sendmsg+0xcc/0x110
[   95.190340]  [<ffffffff82f245e1>] ___sys_sendmsg+0x441/0x880
[   95.196111]  [<ffffffff812cbf05>] ? hash_futex+0x15/0x210
[   95.201620]  [<ffffffff82f241a0>] ? copy_msghdr_from_user+0x550/0x550
[   95.208175]  [<ffffffff812ce990>] ? get_futex_key+0xdc0/0xdc0
[   95.214033]  [<ffffffff82f30536>] ? release_sock+0x3b6/0x500
[   95.219804]  [<ffffffff812d2b6d>] ? do_futex+0x12d/0x17f0
[   95.225315]  [<ffffffff835a9b00>] ? pppol2tp_recv+0x320/0x320
[   95.231171]  [<ffffffff81279747>] ? debug_lockdep_rcu_enabled+0x77/0x90
[   95.237899]  [<ffffffff8157b15f>] ? __fget_light+0x9f/0x1f0
[   95.243587]  [<ffffffff8157b2c8>] ? __fdget+0x18/0x20
[   95.249270]  [<ffffffff82f1fd46>] ? sockfd_lookup_light+0xb6/0x160
[   95.255566]  [<ffffffff82f26c64>] __sys_sendmmsg+0x1d4/0x2e0
[   95.261340]  [<ffffffff82f26a90>] ? SyS_sendmsg+0x50/0x50
[   95.266851]  [<ffffffff81c5331f>] ? security_socket_connect+0x8f/0xc0
[   95.273403]  [<ffffffff82f2380a>] ? SYSC_connect+0x22a/0x300
[   95.279172]  [<ffffffff82f235e0>] ? SYSC_bind+0x280/0x280
[   95.284685]  [<ffffffff812d4d41>] ? compat_SyS_futex+0x1e1/0x2f0
[   95.290803]  [<ffffffff812d4b60>] ? compat_SyS_get_robust_list+0x310/0x310
[   95.297789]  [<ffffffff83010662>] compat_SyS_sendmmsg+0x32/0x40
[   95.303819]  [<ffffffff83010630>] ? compat_SyS_sendmsg+0x40/0x40
[   95.309938]  [<ffffffff81006d94>] do_fast_syscall_32+0x324/0x8b0
[   95.316062]  [<ffffffff838c9e43>] sysenter_flags_fixed+0xd/0x1a
[   95.327206] NOHZ: local_softirq_pending 282