[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 40.700315] audit: type=1800 audit(1546147208.403:25): pid=8050 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.735817] audit: type=1800 audit(1546147208.403:26): pid=8050 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 40.766546] audit: type=1800 audit(1546147208.403:27): pid=8050 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.96' (ECDSA) to the list of known hosts. syzkaller login: [ 48.472991] IPVS: ftp: loaded support on port[0] = 21 [ 48.531776] chnl_net:caif_netlink_parms(): no params data found [ 48.565313] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.572432] bridge0: port 1(bridge_slave_0) entered disabled state [ 48.579643] device bridge_slave_0 entered promiscuous mode [ 48.586926] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.593317] bridge0: port 2(bridge_slave_1) entered disabled state [ 48.600402] device bridge_slave_1 entered promiscuous mode [ 48.616405] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 48.625725] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 48.643029] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 48.650809] team0: Port device team_slave_0 added [ 48.656179] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 48.663477] team0: Port device team_slave_1 added [ 48.668727] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 48.675967] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 48.758910] device hsr_slave_0 entered promiscuous mode [ 48.807427] device hsr_slave_1 entered promiscuous mode [ 48.877309] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 48.884340] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 48.898632] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.905138] bridge0: port 2(bridge_slave_1) entered forwarding state [ 48.912067] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.918447] bridge0: port 1(bridge_slave_0) entered forwarding state [ 48.950246] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 48.956315] 8021q: adding VLAN 0 to HW filter on device bond0 [ 48.964682] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.973781] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.993091] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.001157] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.009190] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 49.019982] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 49.026086] 8021q: adding VLAN 0 to HW filter on device team0 [ 49.034775] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 49.042932] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.049346] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.068723] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 49.076346] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.082760] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.090215] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 49.098123] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 49.106414] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 49.116004] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 49.128008] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 49.136882] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 49.142892] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 49.158297] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 49.168688] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 49.179847] ------------[ cut here ]------------ [ 49.184641] HSR: VLAN not yet supported [ 49.185022] WARNING: CPU: 0 PID: 8203 at net/hsr/hsr_forward.c:336 hsr_forward_skb+0x2196/0x28a0 [ 49.197883] Kernel panic - not syncing: panic_on_warn set ... [ 49.203751] CPU: 0 PID: 8203 Comm: syz-executor112 Not tainted 4.20.0+ #175 [ 49.210831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.220173] Call Trace: [ 49.222787] dump_stack+0x1d3/0x2c6 [ 49.226401] ? dump_stack_print_info.cold.1+0x20/0x20 [ 49.231685] panic+0x2ad/0x55f [ 49.234869] ? add_taint.cold.5+0x16/0x16 [ 49.239006] ? __warn.cold.8+0x5/0x52 [ 49.242796] ? __warn+0xe8/0x1d0 [ 49.246169] ? hsr_forward_skb+0x2196/0x28a0 [ 49.250562] __warn.cold.8+0x20/0x52 [ 49.254273] ? rcu_softirq_qs+0x20/0x20 [ 49.258233] ? hsr_forward_skb+0x2196/0x28a0 [ 49.262633] report_bug+0x254/0x2d0 [ 49.266247] do_error_trap+0x11b/0x200 [ 49.270135] do_invalid_op+0x36/0x40 [ 49.273832] ? hsr_forward_skb+0x2196/0x28a0 [ 49.278230] invalid_op+0x14/0x20 [ 49.281669] RIP: 0010:hsr_forward_skb+0x2196/0x28a0 [ 49.286669] Code: e7 e8 9e 2a ff ff e9 8f f3 ff ff 48 89 85 b0 fe ff ff e8 8d d5 95 f9 48 c7 c7 a0 0e fa 88 c6 05 25 bc 4a 02 01 e8 0a 1b 5f f9 <0f> 0b 48 8b 85 a8 fe ff ff 48 b9 00 00 00 00 00 fc ff df 48 89 c2 [ 49.305562] RSP: 0018:ffff8880a6ae6b28 EFLAGS: 00010282 [ 49.310929] RAX: 0000000000000000 RBX: ffff88808486b580 RCX: 0000000000000000 [ 49.318191] RDX: 0000000000000000 RSI: ffffffff81683f55 RDI: 0000000000000006 [ 49.325444] RBP: ffff8880a6ae6cb8 R08: ffff8880a8b28100 R09: 0000000000000000 [ 49.332700] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 49.339959] R13: ffff88808e274400 R14: ffff88808486b636 R15: ffff8880a6ae6c90 [ 49.347253] ? vprintk_func+0x85/0x181 [ 49.351142] ? hsr_forward_skb+0x2196/0x28a0 [ 49.355534] ? rcu_read_unlock_special+0x370/0x370 [ 49.360451] ? find_held_lock+0x36/0x1c0 [ 49.364501] ? hsr_del_port+0x480/0x480 [ 49.368460] ? rcu_read_unlock+0x5e/0xa0 [ 49.372508] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.377512] ? hsr_netdev_notify+0x1070/0x1070 [ 49.382080] ? __lock_is_held+0xb5/0x140 [ 49.386129] hsr_dev_xmit+0x71/0xa0 [ 49.389743] dev_hard_start_xmit+0x286/0xc80 [ 49.394139] ? dev_direct_xmit+0x6a0/0x6a0 [ 49.398362] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.403881] ? netif_skb_features+0x681/0xb50 [ 49.408362] ? skb_flow_dissect_tunnel_info+0xd80/0xd80 [ 49.413714] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.419243] ? validate_xmit_xfrm+0x41c/0xef0 [ 49.423725] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.429249] ? validate_xmit_skb+0x849/0xf70 [ 49.433646] ? netif_skb_features+0xb50/0xb50 [ 49.438126] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.443647] ? check_preemption_disabled+0x48/0x280 [ 49.448646] ? check_preemption_disabled+0x48/0x280 [ 49.453650] __dev_queue_xmit+0x2f62/0x3ac0 [ 49.457963] ? kasan_kmalloc+0xcb/0xd0 [ 49.461842] ? netdev_pick_tx+0x300/0x300 [ 49.465993] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.471542] ? __alloc_skb+0x4bd/0x760 [ 49.475412] ? print_usage_bug+0xc0/0xc0 [ 49.479460] ? skb_scrub_packet+0x440/0x440 [ 49.483767] ? mark_held_locks+0x130/0x130 [ 49.487995] ? find_held_lock+0x36/0x1c0 [ 49.492064] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.497600] ? refcount_add_not_zero_checked+0x21e/0x330 [ 49.503038] ? refcount_dec_if_one+0x180/0x180 [ 49.507638] ? alloc_skb_with_frags+0x508/0x7c0 [ 49.512303] ? pagevec_lru_move_fn+0x259/0x350 [ 49.516898] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 49.522350] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 49.527875] ? refcount_add_checked+0x2f/0x70 [ 49.532353] ? skb_set_owner_w+0x21d/0x320 [ 49.536586] ? sock_alloc_send_pskb+0x7bb/0xab0 [ 49.541241] ? __lru_cache_add+0x2ff/0x4e0 [ 49.545462] ? sock_wmalloc+0x1f0/0x1f0 [ 49.549426] ? dev_get_by_index+0xf0/0x1c0 [ 49.553644] ? lock_downgrade+0x900/0x900 [ 49.557784] ? check_preemption_disabled+0x48/0x280 [ 49.562815] ? kasan_check_read+0x11/0x20 [ 49.566981] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 49.572250] ? mark_held_locks+0x130/0x130 [ 49.576468] ? rcu_read_unlock_special+0x370/0x370 [ 49.581391] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.587019] ? skb_copy_datagram_from_iter+0x445/0x650 [ 49.592289] ? memcpy+0x45/0x50 [ 49.595570] dev_queue_xmit+0x17/0x20 [ 49.599431] ? dev_queue_xmit+0x17/0x20 [ 49.603396] packet_sendmsg+0x298a/0x6ad0 [ 49.607544] ? __lock_acquire+0x62f/0x4c20 [ 49.611774] ? __this_cpu_preempt_check+0x1c/0x20 [ 49.616606] ? mark_held_locks+0xe0/0x130 [ 49.620745] ? packet_getname+0x5f0/0x5f0 [ 49.624878] ? find_held_lock+0x36/0x1c0 [ 49.628936] ? __might_fault+0x12b/0x1e0 [ 49.632993] ? lock_downgrade+0x900/0x900 [ 49.637126] ? lock_release+0xa00/0xa00 [ 49.641089] ? arch_local_save_flags+0x40/0x40 [ 49.645659] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.651189] ? rw_copy_check_uvector+0x310/0x3e0 [ 49.655954] ? iov_iter_init+0xe5/0x210 [ 49.659925] ? import_iovec+0x178/0x2d0 [ 49.663909] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.669433] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 49.674608] ? smack_socket_sendmsg+0xb0/0x190 [ 49.679180] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.684703] ? security_socket_sendmsg+0x94/0xc0 [ 49.689443] ? packet_getname+0x5f0/0x5f0 [ 49.693578] sock_sendmsg+0xd5/0x120 [ 49.697279] ___sys_sendmsg+0x51d/0x930 [ 49.701242] ? copy_msghdr_from_user+0x580/0x580 [ 49.705985] ? _copy_to_user+0xc8/0x110 [ 49.709962] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.715491] ? sock_do_ioctl+0x110/0x420 [ 49.719540] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.725063] ? __fget_light+0x2e9/0x430 [ 49.729023] ? fget_raw+0x20/0x20 [ 49.732463] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 49.737647] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.743166] ? sockfd_lookup_light+0xc5/0x160 [ 49.747656] __sys_sendmmsg+0x246/0x6d0 [ 49.751628] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 49.755958] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.761486] ? do_vfs_ioctl+0x201/0x1790 [ 49.765533] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 49.770794] ? ioctl_preallocate+0x300/0x300 [ 49.775188] ? memset+0x31/0x40 [ 49.778461] ? do_syscall_64+0x9a/0x820 [ 49.782422] ? do_syscall_64+0x9a/0x820 [ 49.786395] ? lockdep_hardirqs_on+0x421/0x5c0 [ 49.790969] ? trace_hardirqs_on+0xbd/0x310 [ 49.795275] ? security_file_ioctl+0x94/0xc0 [ 49.799676] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.805031] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 49.810479] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.816022] __x64_sys_sendmmsg+0x9d/0x100 [ 49.820246] do_syscall_64+0x1b9/0x820 [ 49.824118] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 49.829468] ? syscall_return_slowpath+0x5e0/0x5e0 [ 49.834380] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.839207] ? trace_hardirqs_on_caller+0x310/0x310 [ 49.844211] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 49.849215] ? prepare_exit_to_usermode+0x291/0x3b0 [ 49.854218] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 49.859049] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.864394] RIP: 0033:0x4418a9 [ 49.867582] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.886657] RSP: 002b:00007ffdeaf8c9e8 EFLAGS: 00000213 ORIG_RAX: 0000000000000133 [ 49.894360] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00000000004418a9 [ 49.901615] RDX: 0000000000000300 RSI: 0000000020008a80 RDI: 0000000000000003 [ 49.908893] RBP: 0000000000000003 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 49.916145] R10: 0000000000000000 R11: 0000000000000213 R12: 00007ffdeaf8ca30 [ 49.923427] R13: 00007ffdeaf8ca20 R14: 0000000000000000 R15: 0000000000000000 [ 49.931754] Kernel Offset: disabled [ 49.935423] Rebooting in 86400 seconds..