[....] 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. [ 26.480881] kauditd_printk_skb: 7 callbacks suppressed [ 26.480894] audit: type=1800 audit(1539743726.782:29): pid=5217 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 26.509195] audit: type=1800 audit(1539743726.782:30): pid=5217 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.9' (ECDSA) to the list of known hosts. syzkaller login: [ 33.782340] IPVS: ftp: loaded support on port[0] = 21 [ 33.950402] bridge0: port 1(bridge_slave_0) entered blocking state [ 33.957066] bridge0: port 1(bridge_slave_0) entered disabled state [ 33.964598] device bridge_slave_0 entered promiscuous mode [ 33.983750] bridge0: port 2(bridge_slave_1) entered blocking state [ 33.990316] bridge0: port 2(bridge_slave_1) entered disabled state [ 33.997750] device bridge_slave_1 entered promiscuous mode [ 34.016867] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 34.035877] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 34.088321] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 34.109809] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 34.188699] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 34.196070] team0: Port device team_slave_0 added [ 34.213094] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 34.220259] team0: Port device team_slave_1 added [ 34.237866] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 34.257740] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 34.276806] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 34.296371] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 34.443199] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.449717] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.456675] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.463126] 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 [ 34.987422] 8021q: adding VLAN 0 to HW filter on device bond0 [ 35.039496] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 35.093205] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 35.099659] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 35.106827] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.157719] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 35.474868] 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() [ 35.488278] CPU: 0 PID: 5613 Comm: syz-executor269 Not tainted 4.19.0-rc8+ #286 [ 35.495727] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.505077] Call Trace: [ 35.507648] [ 35.509795] dump_stack+0x1c4/0x2b4 [ 35.513420] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.518618] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.524147] ? tfrc_rx_handle_loss+0x67b/0x1eb0 [ 35.528812] tfrc_rx_hist_sample_rtt.cold.3+0x54/0x5c [ 35.533999] ccid3_hc_rx_packet_recv+0x5c4/0xeb0 [ 35.538742] ? dccp_parse_options+0x4a1/0x12f0 [ 35.543315] ? ccid3_hc_tx_send_packet+0x880/0x880 [ 35.548236] dccp_deliver_input_to_ccids+0xf0/0x280 [ 35.553246] dccp_rcv_established+0x87/0xb0 [ 35.557794] dccp_v4_do_rcv+0x153/0x180 [ 35.561757] __sk_receive_skb+0x3e5/0xec0 [ 35.565893] ? sk_free+0x50/0x50 [ 35.569253] ? inet_lhash2_lookup+0x6e0/0x6e0 [ 35.573733] ? reqsk_fastopen_remove+0x660/0x660 [ 35.578501] ? lock_downgrade+0x900/0x900 [ 35.582639] ? check_preemption_disabled+0x48/0x200 [ 35.587662] ? dccp_invalid_packet+0x64/0x880 [ 35.592165] dccp_v4_rcv+0x10f9/0x1f58 [ 35.596044] ? dccp_v4_err+0x18a0/0x18a0 [ 35.600099] ? __lock_is_held+0xb5/0x140 [ 35.604158] ip_local_deliver_finish+0x2e9/0xda0 [ 35.608905] ? ip_sublist_rcv_finish+0x3f0/0x3f0 [ 35.613651] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.618660] ? nf_hook_slow+0x11e/0x1c0 [ 35.622635] ip_local_deliver+0x1e9/0x750 [ 35.626783] ? ip_call_ra_chain+0x730/0x730 [ 35.631115] ? ip_sublist_rcv_finish+0x3f0/0x3f0 [ 35.635879] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 35.641664] ? kasan_check_read+0x11/0x20 [ 35.645807] ? rcu_bh_qs+0xc0/0xc0 [ 35.649341] ip_rcv_finish+0x1f9/0x300 [ 35.653220] ip_rcv+0xed/0x600 [ 35.656402] ? ip_local_deliver+0x750/0x750 [ 35.660715] ? ip_rcv_finish_core.isra.15+0x1f40/0x1f40 [ 35.666083] ? lock_acquire+0x1ed/0x520 [ 35.670050] ? process_backlog+0x1a7/0x6f0 [ 35.674277] __netif_receive_skb_one_core+0x14d/0x200 [ 35.679455] ? __netif_receive_skb_core+0x3b60/0x3b60 [ 35.684675] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.689981] ? rcu_bh_qs+0xc0/0xc0 [ 35.693538] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 35.698984] __netif_receive_skb+0x2c/0x1e0 [ 35.703297] process_backlog+0x218/0x6f0 [ 35.707364] net_rx_action+0x7c5/0x1950 [ 35.711353] ? napi_complete_done+0x6d0/0x6d0 [ 35.715835] ? graph_lock+0x170/0x170 [ 35.719623] ? do_raw_spin_lock+0xc1/0x200 [ 35.723845] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.729381] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 35.734386] ? graph_lock+0x170/0x170 [ 35.738205] ? print_usage_bug+0xc0/0xc0 [ 35.742256] ? lock_release+0x970/0x970 [ 35.746221] ? find_held_lock+0x36/0x1c0 [ 35.750275] ? pvclock_read_flags+0x160/0x160 [ 35.754758] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.760308] ? check_preemption_disabled+0x48/0x200 [ 35.765310] ? check_preemption_disabled+0x48/0x200 [ 35.770318] ? print_usage_bug+0xc0/0xc0 [ 35.774386] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.779914] ? check_preemption_disabled+0x48/0x200 [ 35.784916] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.790446] ? __local_bh_enable+0xef/0x130 [ 35.794758] ? graph_lock+0x170/0x170 [ 35.798546] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.804072] ? check_preemption_disabled+0x48/0x200 [ 35.809075] ? check_preemption_disabled+0x48/0x200 [ 35.814084] ? __lock_is_held+0xb5/0x140 [ 35.818146] __do_softirq+0x30b/0xad8 [ 35.821937] ? __irqentry_text_end+0x1f9618/0x1f9618 [ 35.827040] ? smp_reschedule_interrupt+0x109/0x650 [ 35.832062] ? smp_thermal_interrupt+0x850/0x850 [ 35.836802] ? ret_from_intr+0xb/0x1e [ 35.840591] ? trace_hardirqs_off_caller+0xbb/0x310 [ 35.845599] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.850428] ? trace_hardirqs_on_caller+0x310/0x310 [ 35.855431] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.860983] ? check_preemption_disabled+0x48/0x200 [ 35.865996] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.871548] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.876393] ? ip_finish_output2+0xa83/0x1860 [ 35.880902] do_softirq_own_stack+0x2a/0x40 [ 35.885205] [ 35.887450] do_softirq.part.13+0x126/0x160 [ 35.891761] __local_bh_enable_ip+0x21d/0x260 [ 35.896243] ip_finish_output2+0xab6/0x1860 [ 35.900555] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 35.906338] ? ip_copy_metadata+0xe10/0xe10 [ 35.910650] ? graph_lock+0x170/0x170 [ 35.914451] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.920003] ? check_preemption_disabled+0x48/0x200 [ 35.925020] ? check_preemption_disabled+0x48/0x200 [ 35.930037] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.935563] ? ipv4_mtu+0x37d/0x590 [ 35.939181] ? __lock_is_held+0xb5/0x140 [ 35.943256] ip_finish_output+0x7fd/0xf60 [ 35.947394] ? ip_finish_output+0x7fd/0xf60 [ 35.951725] ? ip_fragment.constprop.49+0x240/0x240 [ 35.956726] ? kasan_check_read+0x11/0x20 [ 35.960866] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 35.966156] ? rcu_bh_qs+0xc0/0xc0 [ 35.969689] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 35.974693] ? nf_hook_slow+0x11e/0x1c0 [ 35.978674] ip_output+0x21d/0x8d0 [ 35.982212] ? ip_mc_output+0x15b0/0x15b0 [ 35.986348] ? ip_fragment.constprop.49+0x240/0x240 [ 35.991370] ? __lock_is_held+0xb5/0x140 [ 35.995433] ip_local_out+0xc5/0x1b0 [ 35.999137] __ip_queue_xmit+0x9af/0x1f30 [ 36.003296] ? ip_build_and_send_pkt+0xc80/0xc80 [ 36.008041] ? __skb_checksum+0x920/0x920 [ 36.012190] ? skb_send_sock+0x50/0x50 [ 36.016064] ? reqsk_fastopen_remove+0x660/0x660 [ 36.020806] ? dccp_insert_option_padding+0xbc/0xe0 [ 36.025814] ip_queue_xmit+0x56/0x70 [ 36.029520] dccp_transmit_skb+0x98c/0x12e0 [ 36.033842] dccp_xmit_packet+0x25e/0x7d0 [ 36.037980] ? kasan_check_write+0x14/0x20 [ 36.042202] ? do_raw_spin_lock+0xc1/0x200 [ 36.046420] ? dccp_send_sync+0x270/0x270 [ 36.050553] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 36.055570] ? ccid3_hc_tx_send_packet+0x358/0x880 [ 36.060491] dccp_write_xmit+0x190/0x1f0 [ 36.064541] dccp_sendmsg+0xdc8/0x1020 [ 36.068421] ? dccp_getsockopt+0xf0/0xf0 [ 36.072472] ? find_held_lock+0x36/0x1c0 [ 36.076526] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 36.081443] ? aa_sk_perm+0x218/0x8b0 [ 36.085235] ? __might_fault+0x12b/0x1e0 [ 36.089283] ? aa_af_perm+0x5a0/0x5a0 [ 36.093070] ? lock_release+0x970/0x970 [ 36.097041] ? arch_local_save_flags+0x40/0x40 [ 36.101622] inet_sendmsg+0x1a1/0x690 [ 36.105413] ? ipip_gro_receive+0x100/0x100 [ 36.109744] ? apparmor_socket_sendmsg+0x29/0x30 [ 36.114491] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.120035] ? security_socket_sendmsg+0x94/0xc0 [ 36.124775] ? ipip_gro_receive+0x100/0x100 [ 36.129087] sock_sendmsg+0xd5/0x120 [ 36.132788] ___sys_sendmsg+0x51d/0x930 [ 36.136752] ? copy_msghdr_from_user+0x580/0x580 [ 36.141505] ? __fget_light+0x2e9/0x430 [ 36.145482] ? fget_raw+0x20/0x20 [ 36.148932] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.153529] ? trace_hardirqs_on+0xbd/0x310 [ 36.157852] ? _raw_spin_unlock_bh+0x30/0x40 [ 36.162258] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 36.167718] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.173245] ? check_preemption_disabled+0x48/0x200 [ 36.178286] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.183808] ? sockfd_lookup_light+0xc5/0x160 [ 36.188312] __sys_sendmmsg+0x246/0x6d0 [ 36.192279] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 36.196593] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 36.202139] ? fput+0x130/0x1a0 [ 36.205407] ? __sys_connect+0x1d1/0x4c0 [ 36.209453] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.215005] ? __ia32_sys_accept+0xb0/0xb0 [ 36.219239] ? __x64_sys_futex+0x47f/0x6a0 [ 36.223478] ? do_syscall_64+0x9a/0x820 [ 36.227444] ? do_syscall_64+0x9a/0x820 [ 36.231417] ? lockdep_hardirqs_on+0x421/0x5c0 [ 36.235997] ? trace_hardirqs_on+0xbd/0x310 [ 36.240304] ? find_held_lock+0x36/0x1c0 [ 36.244374] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.249756] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 36.255196] __x64_sys_sendmmsg+0x9d/0x100 [ 36.259420] do_syscall_64+0x1b9/0x820 [ 36.263292] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 36.268655] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.273573] ? trace_hardirqs_on_caller+0x310/0x310 [ 36.278589] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 36.283606] ? recalc_sigpending_tsk+0x180/0x180 [ 36.288347] ? kasan_check_write+0x14/0x20 [ 36.292574] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.297406] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.302593] RIP: 0033:0x446cb9 [ 36.305775] 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 [ 36.324663] RSP: 002b:00007ff415e1ada8 EFLAGS: 00000297 ORIG_RAX: 0000000000000133 [ 36.332365] RAX: ffffffffffffffda RBX: 00000000006dcc68 RCX: 0000000000446cb9 [ 36.339642] RDX: 0000000000000003 RSI: 00000000200037c0 RDI: 0000000000000005 [ 36.346895] RBP: 00000000006dcc60 R08: 0000000000000000 R09: 0000000000000000 [ 36.354164] R10: 0000000000000080 R11: 0000000000000297 R12: 00000000006dcc6c [ 36.361421] R13: cdef9a1cfd2198c8 R14: d5f212e95c33dd08 R15: 0000000000000005