[ 35.062329] audit: type=1800 audit(1550969037.050:27): pid=7457 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.082150] audit: type=1800 audit(1550969037.050:28): pid=7457 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 35.739922] audit: type=1800 audit(1550969037.810:29): pid=7457 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 [ 35.759397] audit: type=1800 audit(1550969037.810:30): pid=7457 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 '10.128.0.96' (ECDSA) to the list of known hosts. 2019/02/24 00:44:09 parsed 1 programs 2019/02/24 00:44:10 executed programs: 0 syzkaller login: [ 48.915925] IPVS: ftp: loaded support on port[0] = 21 [ 48.969426] chnl_net:caif_netlink_parms(): no params data found [ 48.997007] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.004665] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.011645] device bridge_slave_0 entered promiscuous mode [ 49.019038] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.025422] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.032411] device bridge_slave_1 entered promiscuous mode [ 49.046410] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 49.055543] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 49.071968] team0: Port device team_slave_0 added [ 49.077749] team0: Port device team_slave_1 added [ 49.130554] device hsr_slave_0 entered promiscuous mode [ 49.198712] device hsr_slave_1 entered promiscuous mode [ 49.275667] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.282140] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.289157] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.295519] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.323252] 8021q: adding VLAN 0 to HW filter on device bond0 [ 49.334491] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 49.354016] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.362068] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.370614] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 49.380650] 8021q: adding VLAN 0 to HW filter on device team0 [ 49.388933] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 49.396747] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.403137] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.420610] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 49.428226] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.434621] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.442756] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 49.450941] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 49.458693] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 49.468281] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 49.479661] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 49.491721] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 49.499984] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 49.515435] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 49.560286] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. [ 49.858871] WARNING: CPU: 1 PID: 0 at net/ipv4/tcp_output.c:2535 tcp_send_loss_probe+0x771/0x8a0 [ 49.867925] Kernel panic - not syncing: panic_on_warn set ... [ 49.873801] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.0.0-rc7+ #86 [ 49.880274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.889612] Call Trace: [ 49.892182] [ 49.894331] dump_stack+0x172/0x1f0 [ 49.897949] ? tcp_send_loss_probe+0x6a0/0x8a0 [ 49.902519] panic+0x2cb/0x65c [ 49.905700] ? __warn_printk+0xf3/0xf3 [ 49.909576] ? tcp_send_loss_probe+0x771/0x8a0 [ 49.914149] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.919685] ? __warn.cold+0x5/0x45 [ 49.923308] ? __warn+0xe8/0x1d0 [ 49.926672] ? tcp_send_loss_probe+0x771/0x8a0 [ 49.931239] __warn.cold+0x20/0x45 [ 49.934795] ? tcp_send_loss_probe+0x771/0x8a0 [ 49.939451] report_bug+0x263/0x2b0 [ 49.943068] do_error_trap+0x11b/0x200 [ 49.946948] do_invalid_op+0x37/0x50 [ 49.950652] ? tcp_send_loss_probe+0x771/0x8a0 [ 49.955220] invalid_op+0x14/0x20 [ 49.958660] RIP: 0010:tcp_send_loss_probe+0x771/0x8a0 [ 49.963833] Code: 88 fc ff ff 4c 89 ef e8 1d 76 c9 fb e9 c8 fc ff ff e8 73 76 c9 fb e9 63 fd ff ff e8 09 76 c9 fb e9 94 f9 ff ff e8 af 73 92 fb <0f> 0b e9 7d fa ff ff e8 a3 73 92 fb 0f b6 1d 07 6e 7b 03 31 ff 89 [ 49.982727] RSP: 0018:ffff8880ae907c68 EFLAGS: 00010206 [ 49.988084] RAX: ffff8880aa290340 RBX: 0000000000000000 RCX: ffffffff85dd68fb [ 49.995339] RDX: 0000000000000100 RSI: ffffffff85dd6dd1 RDI: 0000000000000005 [ 50.002600] RBP: ffff8880ae907c98 R08: ffff8880aa290340 R09: ffffed10109f69e1 [ 50.009853] R10: ffffed10109f69e0 R11: ffff888084fb4f03 R12: ffff8880a57b6b40 [ 50.017108] R13: ffff888084fb4d40 R14: 0000000000008000 R15: ffff8880a57b7350 [ 50.024398] ? tcp_send_loss_probe+0x29b/0x8a0 [ 50.028965] ? tcp_send_loss_probe+0x771/0x8a0 [ 50.033541] ? tcp_send_loss_probe+0x771/0x8a0 [ 50.038137] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 50.043145] tcp_write_timer_handler+0x4f8/0x8e0 [ 50.047902] tcp_write_timer+0x10e/0x1d0 [ 50.051964] call_timer_fn+0x190/0x720 [ 50.055882] ? tcp_write_timer_handler+0x8e0/0x8e0 [ 50.060801] ? process_timeout+0x40/0x40 [ 50.064849] ? run_timer_softirq+0x647/0x1700 [ 50.069331] ? trace_hardirqs_on+0x67/0x230 [ 50.073650] ? kasan_check_read+0x11/0x20 [ 50.077786] ? tcp_write_timer_handler+0x8e0/0x8e0 [ 50.082714] run_timer_softirq+0x652/0x1700 [ 50.087024] ? add_timer+0xbe0/0xbe0 [ 50.090727] ? kvm_clock_read+0x18/0x30 [ 50.094693] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.100216] ? check_preemption_disabled+0x48/0x290 [ 50.105223] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 50.110681] __do_softirq+0x266/0x95a [ 50.114474] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.120013] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.125558] irq_exit+0x180/0x1d0 [ 50.129003] smp_apic_timer_interrupt+0x14a/0x570 [ 50.133835] apic_timer_interrupt+0xf/0x20 [ 50.138047] [ 50.140270] RIP: 0010:native_safe_halt+0x2/0x10 [ 50.144942] Code: ff ff ff 48 89 c7 48 89 45 d8 e8 59 a9 a3 fa 48 8b 45 d8 e9 ce fe ff ff 48 89 df e8 48 a9 a3 fa eb 82 90 90 90 90 90 90 fb f4 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f4 c3 90 90 90 90 90 90 [ 50.163828] RSP: 0018:ffff8880aa29fd78 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 50.171521] RAX: 1ffffffff1125061 RBX: ffff8880aa290340 RCX: 0000000000000000 [ 50.178776] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa290bbc [ 50.186028] RBP: ffff8880aa29fda8 R08: ffff8880aa290340 R09: 0000000000000000 [ 50.193280] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 50.200535] R13: ffffffff889282f8 R14: 0000000000000001 R15: 0000000000000000 [ 50.207816] ? default_idle+0x4e/0x330 [ 50.211702] arch_cpu_idle+0x10/0x20 [ 50.215409] default_idle_call+0x36/0x90 [ 50.219459] do_idle+0x386/0x570 [ 50.222810] ? arch_cpu_idle_exit+0x80/0x80 [ 50.227123] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 50.232212] ? complete+0x61/0x80 [ 50.235652] cpu_startup_entry+0x1b/0x20 [ 50.239700] start_secondary+0x404/0x5c0 [ 50.243745] ? set_cpu_sibling_map+0x1850/0x1850 [ 50.248502] secondary_startup_64+0xa4/0xb0 [ 50.253923] Kernel Offset: disabled [ 50.257605] Rebooting in 86400 seconds..