INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.13' (ECDSA) to the list of known hosts. syzkaller login: [ 34.909596] IPVS: ftp: loaded support on port[0] = 21 [ 35.068580] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.075406] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.082415] device bridge_slave_0 entered promiscuous mode [ 35.100229] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.106737] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.113638] device bridge_slave_1 entered promiscuous mode [ 35.131726] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 35.148652] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 35.195972] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 35.215396] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 35.286240] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 35.293474] team0: Port device team_slave_0 added [ 35.310318] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 35.317435] team0: Port device team_slave_1 added [ 35.333577] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 35.357396] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 35.375747] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 35.394924] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported [ 35.447948] ip (5615) used greatest stack depth: 16600 bytes left RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 35.535399] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.541819] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.548821] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.555207] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 36.046012] 8021q: adding VLAN 0 to HW filter on device bond0 [ 36.096007] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 36.144783] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 36.150916] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 36.159232] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 36.206456] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 36.482411] BUG: please report to dccp@vger.kernel.org => prev = 0, last = 0 at net/dccp/ccids/lib/packet_history.c:425/tfrc_rx_hist_sample_rtt() [ 36.495758] CPU: 0 PID: 5792 Comm: syz-executor373 Not tainted 4.19.0-rc5-next-20180924+ #78 [ 36.504726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.514065] Call Trace: [ 36.516633] [ 36.518774] dump_stack+0x1d3/0x2c4 [ 36.522389] ? dump_stack_print_info.cold.2+0x52/0x52 [ 36.527579] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.533128] ? tfrc_rx_handle_loss+0x67b/0x1eb0 [ 36.537790] tfrc_rx_hist_sample_rtt.cold.3+0x54/0x5c [ 36.542977] ccid3_hc_rx_packet_recv+0x5c4/0xeb0 [ 36.547719] ? dccp_parse_options+0x4a1/0x12f0 [ 36.552290] ? ccid3_hc_tx_send_packet+0x880/0x880 [ 36.557206] dccp_deliver_input_to_ccids+0xf0/0x280 [ 36.562209] dccp_rcv_established+0x87/0xb0 [ 36.566518] dccp_v4_do_rcv+0x153/0x180 [ 36.570482] __sk_receive_skb+0x3e0/0xeb0 [ 36.574617] ? sk_free+0x50/0x50 [ 36.578008] ? inet_lhash2_lookup+0x6e0/0x6e0 [ 36.582532] ? reqsk_fastopen_remove+0x660/0x660 [ 36.587278] ? lock_downgrade+0x900/0x900 [ 36.591487] ? check_preemption_disabled+0x48/0x200 [ 36.596495] ? dccp_invalid_packet+0x64/0x880 [ 36.600980] dccp_v4_rcv+0x10f9/0x1f58 [ 36.604871] ? dccp_v4_err+0x18a0/0x18a0 [ 36.608942] ? __lock_is_held+0xb5/0x140 [ 36.613008] ip_local_deliver_finish+0x2e9/0xda0 [ 36.617758] ? ip_sublist_rcv_finish+0x3a0/0x3a0 [ 36.622535] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 36.627538] ? nf_hook_slow+0x11e/0x1c0 [ 36.631504] ip_local_deliver+0x1e4/0x740 [ 36.635640] ? ip_call_ra_chain+0x730/0x730 [ 36.639971] ? ip_sublist_rcv_finish+0x3a0/0x3a0 [ 36.644713] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 36.649625] ? kasan_check_read+0x11/0x20 [ 36.653759] ? rcu_softirq_qs+0x20/0x20 [ 36.657721] ip_rcv_finish+0x1f9/0x300 [ 36.661609] ip_rcv+0xe8/0x610 [ 36.664788] ? ip_local_deliver+0x740/0x740 [ 36.669095] ? ip_rcv_finish_core.isra.16+0x1f40/0x1f40 [ 36.674448] ? lock_acquire+0x1ed/0x520 [ 36.678421] ? process_backlog+0x1a6/0x760 [ 36.682640] __netif_receive_skb_one_core+0x14d/0x200 [ 36.687843] ? __netif_receive_skb_core+0x3b20/0x3b20 [ 36.693039] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 36.698299] ? rcu_softirq_qs+0x20/0x20 [ 36.702259] ? trace_hardirqs_off_caller+0x300/0x300 [ 36.707389] __netif_receive_skb+0x27/0x1e0 [ 36.711697] process_backlog+0x217/0x760 [ 36.715749] net_rx_action+0x7c5/0x1950 [ 36.719714] ? napi_complete_done+0x6d0/0x6d0 [ 36.724192] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 36.729451] ? rcu_softirq_qs+0x20/0x20 [ 36.733418] ? rebalance_domains+0x375/0xdc0 [ 36.737816] ? load_balance+0x37b0/0x37b0 [ 36.741978] ? print_usage_bug+0xc0/0xc0 [ 36.746021] ? lock_release+0x970/0x970 [ 36.749999] ? find_held_lock+0x36/0x1c0 [ 36.754066] ? pvclock_read_flags+0x160/0x160 [ 36.758551] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.764073] ? check_preemption_disabled+0x48/0x200 [ 36.769077] ? print_usage_bug+0xc0/0xc0 [ 36.773162] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.778685] ? check_preemption_disabled+0x48/0x200 [ 36.783687] ? __local_bh_enable+0xef/0x130 [ 36.787996] ? graph_lock+0x170/0x170 [ 36.791799] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.797324] ? check_preemption_disabled+0x48/0x200 [ 36.802328] ? __lock_is_held+0xb5/0x140 [ 36.806385] __do_softirq+0x30b/0xb03 [ 36.810177] ? __irqentry_text_end+0x1f9698/0x1f9698 [ 36.815267] ? smp_reschedule_interrupt+0x109/0x650 [ 36.820270] ? smp_thermal_interrupt+0x850/0x850 [ 36.825009] ? ret_from_intr+0xb/0x1e [ 36.828796] ? trace_hardirqs_off_caller+0xbb/0x300 [ 36.833799] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.838628] ? trace_hardirqs_off+0x310/0x310 [ 36.843107] ? task_prio+0x50/0x50 [ 36.846633] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.852154] ? check_preemption_disabled+0x48/0x200 [ 36.857160] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.861989] ? ip_finish_output2+0xa83/0x18c0 [ 36.866469] do_softirq_own_stack+0x2a/0x40 [ 36.870768] [ 36.872992] do_softirq.part.13+0x126/0x160 [ 36.877297] __local_bh_enable_ip+0x21d/0x260 [ 36.881775] ip_finish_output2+0xab6/0x18c0 [ 36.886081] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 36.890993] ? ip_copy_metadata+0xe10/0xe10 [ 36.895305] ? graph_lock+0x170/0x170 [ 36.899092] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.904613] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.910134] ? ipv4_mtu+0x37d/0x590 [ 36.913746] ? __lock_is_held+0xb5/0x140 [ 36.917799] ip_finish_output+0x7f8/0xf90 [ 36.921932] ? ip_finish_output+0x7f8/0xf90 [ 36.926239] ? ip_fragment.constprop.50+0x240/0x240 [ 36.931241] ? kasan_check_read+0x11/0x20 [ 36.935392] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 36.940655] ? rcu_softirq_qs+0x20/0x20 [ 36.944617] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 36.949616] ? nf_hook_slow+0x11e/0x1c0 [ 36.953574] ip_output+0x21d/0x8d0 [ 36.957100] ? ip_mc_output+0x15a0/0x15a0 [ 36.961230] ? ip_fragment.constprop.50+0x240/0x240 [ 36.966232] ? __lock_is_held+0xb5/0x140 [ 36.970284] ip_local_out+0xc5/0x1b0 [ 36.973998] __ip_queue_xmit+0x9af/0x1f30 [ 36.978141] ? ip_build_and_send_pkt+0xc80/0xc80 [ 36.982969] ? __skb_checksum+0x920/0x920 [ 36.987116] ? skb_send_sock+0x50/0x50 [ 36.990985] ? reqsk_fastopen_remove+0x660/0x660 [ 36.995725] ? dccp_insert_option_padding+0xbc/0xe0 [ 37.000731] ip_queue_xmit+0x56/0x70 [ 37.004429] dccp_transmit_skb+0x98c/0x12e0 [ 37.008755] dccp_xmit_packet+0x25e/0x8a0 [ 37.012891] ? kasan_check_write+0x14/0x20 [ 37.017109] ? do_raw_spin_lock+0xc1/0x200 [ 37.021344] ? dccp_send_sync+0x270/0x270 [ 37.025483] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 37.030482] ? ccid3_hc_tx_send_packet+0x358/0x880 [ 37.035401] dccp_write_xmit+0x190/0x1f0 [ 37.039448] dccp_sendmsg+0x9cc/0x1020 [ 37.043340] ? dccp_getsockopt+0xf0/0xf0 [ 37.047408] ? __might_sleep+0x95/0x190 [ 37.051370] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 37.056294] ? aa_sk_perm+0x22b/0x8e0 [ 37.060089] ? import_iovec+0x269/0x470 [ 37.064049] ? aa_af_perm+0x5a0/0x5a0 [ 37.067853] inet_sendmsg+0x19c/0x690 [ 37.071640] ? ipip_gro_receive+0x100/0x100 [ 37.075951] ? apparmor_socket_sendmsg+0x29/0x30 [ 37.080691] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 37.086215] ? security_socket_sendmsg+0x94/0xc0 [ 37.090954] ? ipip_gro_receive+0x100/0x100 [ 37.095261] sock_sendmsg+0xd5/0x120 [ 37.098959] ___sys_sendmsg+0x7fd/0x930 [ 37.102921] ? copy_msghdr_from_user+0x580/0x580 [ 37.107665] ? kasan_check_write+0x14/0x20 [ 37.111889] ? __fget_light+0x2e9/0x430 [ 37.115868] ? fget_raw+0x20/0x20 [ 37.119321] ? do_dccp_setsockopt.isra.10+0x1fc/0x7b0 [ 37.124506] ? trace_hardirqs_off_caller+0x300/0x300 [ 37.129600] ? __kasan_slab_free+0x119/0x150 [ 37.133994] ? do_dccp_setsockopt.isra.10+0x1fc/0x7b0 [ 37.139174] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 37.144695] ? sockfd_lookup_light+0xc5/0x160 [ 37.149178] __sys_sendmsg+0x11d/0x280 [ 37.153051] ? __ia32_sys_shutdown+0x80/0x80 [ 37.157442] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 37.162961] ? fput+0x130/0x1a0 [ 37.166227] ? __x64_sys_futex+0x47f/0x6a0 [ 37.170446] ? do_syscall_64+0x9a/0x820 [ 37.174402] ? do_syscall_64+0x9a/0x820 [ 37.178382] ? trace_hardirqs_off_caller+0x300/0x300 [ 37.183473] __x64_sys_sendmsg+0x78/0xb0 [ 37.187537] do_syscall_64+0x1b9/0x820 [ 37.191412] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 37.196759] ? syscall_return_slowpath+0x5e0/0x5e0 [ 37.201670] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.206499] ? trace_hardirqs_off+0x310/0x310 [ 37.210979] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 37.215979] ? prepare_exit_to_usermode+0x291/0x3b0 [ 37.220983] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 37.225814] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 37.230999] RIP: 0033:0x446a49 [ 37.234174] Code: e8 cc b8 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 37.253059] RSP: 002b:00007f43f1332da8 EFLAGS: 00000293 ORIG_RAX: 000000000000002e [ 37.260757] RAX: ffffffffffffffda RBX: 00000000006dec48 RCX: 0000000000446a49 [ 37.268015] RDX: 0000000004000080 RSI: 00000000200030c0 RDI: 0000000000000005 [ 37.275268] RBP: 00000000006dec40 R08: 0000000000000000 R09: 0000000000000000 [ 37.282694] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dec4c [ 37.289951] R13: 00000000004b01c8 R14: 0000000020001f80 R15: 0000000000000000