[ 36.618713] audit: type=1800 audit(1550957459.742:27): pid=7541 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.652869] audit: type=1800 audit(1550957459.812:28): pid=7541 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. [ 37.732378] audit: type=1800 audit(1550957460.892:29): pid=7541 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 [ 37.752066] audit: type=1800 audit(1550957460.892:30): pid=7541 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 '10.128.0.199' (ECDSA) to the list of known hosts. syzkaller login: [ 44.713336] IPVS: ftp: loaded support on port[0] = 21 [ 44.772624] chnl_net:caif_netlink_parms(): no params data found [ 44.804506] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.811315] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.818502] device bridge_slave_0 entered promiscuous mode [ 44.825573] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.832314] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.839399] device bridge_slave_1 entered promiscuous mode [ 44.855236] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 44.864768] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 44.882495] team0: Port device team_slave_0 added [ 44.888716] team0: Port device team_slave_1 added [ 44.940087] device hsr_slave_0 entered promiscuous mode [ 45.007839] device hsr_slave_1 entered promiscuous mode [ 45.085352] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.091852] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.098769] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.105131] bridge0: port 1(bridge_slave_0) entered forwarding state [ 45.135412] 8021q: adding VLAN 0 to HW filter on device bond0 [ 45.146526] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 45.155834] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.163425] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.170756] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 45.181072] 8021q: adding VLAN 0 to HW filter on device team0 [ 45.190015] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 45.198335] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.204659] bridge0: port 1(bridge_slave_0) entered forwarding state [ 45.218857] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 45.226374] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.232852] bridge0: port 2(bridge_slave_1) entered forwarding state [ 45.249687] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 45.257520] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 45.266119] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 45.273739] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 45.281634] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 45.290260] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 45.305996] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 45.316800] 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. [ 45.708044] WARNING: CPU: 1 PID: 0 at net/ipv4/tcp_output.c:2534 tcp_send_loss_probe+0x771/0x8a0 [ 45.717094] Kernel panic - not syncing: panic_on_warn set ... [ 45.722980] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.0.0-rc7+ #77 [ 45.729466] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.738849] Call Trace: [ 45.741411] [ 45.743550] dump_stack+0x172/0x1f0 [ 45.747159] ? tcp_send_loss_probe+0x6c0/0x8a0 [ 45.751722] panic+0x2cb/0x65c [ 45.754899] ? __warn_printk+0xf3/0xf3 [ 45.758773] ? tcp_send_loss_probe+0x771/0x8a0 [ 45.763339] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.768859] ? __warn.cold+0x5/0x45 [ 45.772469] ? __warn+0xe8/0x1d0 [ 45.775823] ? tcp_send_loss_probe+0x771/0x8a0 [ 45.780387] __warn.cold+0x20/0x45 [ 45.783932] ? trace_hardirqs_off+0x62/0x220 [ 45.788331] ? tcp_send_loss_probe+0x771/0x8a0 [ 45.792897] report_bug+0x263/0x2b0 [ 45.796508] do_error_trap+0x11b/0x200 [ 45.800380] do_invalid_op+0x37/0x50 [ 45.804074] ? tcp_send_loss_probe+0x771/0x8a0 [ 45.808637] invalid_op+0x14/0x20 [ 45.812071] RIP: 0010:tcp_send_loss_probe+0x771/0x8a0 [ 45.817243] Code: 88 fc ff ff 4c 89 ef e8 ed 75 c8 fb e9 c8 fc ff ff e8 43 76 c8 fb e9 63 fd ff ff e8 d9 75 c8 fb e9 94 f9 ff ff e8 bf 03 91 fb <0f> 0b e9 7d fa ff ff e8 b3 03 91 fb 0f b6 1d 37 43 7a 03 31 ff 89 [ 45.836127] RSP: 0018:ffff8880ae907c60 EFLAGS: 00010206 [ 45.841473] RAX: ffff8880a989c340 RBX: 0000000000000000 RCX: ffffffff85dedbdb [ 45.848725] RDX: 0000000000000100 RSI: ffffffff85dee0b1 RDI: 0000000000000005 [ 45.855975] RBP: ffff8880ae907c90 R08: ffff8880a989c340 R09: ffffed10147d1ae1 [ 45.863225] R10: ffffed10147d1ae0 R11: ffff8880a3e8d703 R12: ffff888091b90040 [ 45.870474] R13: ffff8880a3e8d540 R14: 0000000000008000 R15: ffff888091b90860 [ 45.877740] ? tcp_send_loss_probe+0x29b/0x8a0 [ 45.882305] ? tcp_send_loss_probe+0x771/0x8a0 [ 45.886874] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 45.891890] tcp_write_timer_handler+0x5c0/0x8a0 [ 45.896627] tcp_write_timer+0x10e/0x1d0 [ 45.900675] call_timer_fn+0x190/0x720 [ 45.904545] ? tcp_write_timer_handler+0x8a0/0x8a0 [ 45.909456] ? process_timeout+0x40/0x40 [ 45.913493] ? run_timer_softirq+0x647/0x1700 [ 45.917987] ? trace_hardirqs_on+0x67/0x230 [ 45.922291] ? kasan_check_read+0x11/0x20 [ 45.926417] ? tcp_write_timer_handler+0x8a0/0x8a0 [ 45.931369] run_timer_softirq+0x652/0x1700 [ 45.935674] ? add_timer+0xbe0/0xbe0 [ 45.939373] ? kvm_clock_read+0x18/0x30 [ 45.943330] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.948851] ? check_preemption_disabled+0x48/0x290 [ 45.953851] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 45.959283] __do_softirq+0x266/0x95a [ 45.963064] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.968581] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.974104] irq_exit+0x180/0x1d0 [ 45.977570] smp_apic_timer_interrupt+0x14a/0x570 [ 45.982424] apic_timer_interrupt+0xf/0x20 [ 45.986634] [ 45.988854] RIP: 0010:native_safe_halt+0x2/0x10 [ 45.993502] Code: ff ff ff 48 89 c7 48 89 45 d8 e8 59 0c a1 fa 48 8b 45 d8 e9 ce fe ff ff 48 89 df e8 48 0c a1 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 [ 46.012384] RSP: 0018:ffff8880a98afd78 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 46.020073] RAX: 1ffffffff1125061 RBX: ffff8880a989c340 RCX: 0000000000000000 [ 46.027329] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880a989cbbc [ 46.034579] RBP: ffff8880a98afda8 R08: ffff8880a989c340 R09: 0000000000000000 [ 46.041834] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 46.049085] R13: ffffffff889282f8 R14: 0000000000000001 R15: 0000000000000000 [ 46.056357] ? default_idle+0x4e/0x330 [ 46.060234] arch_cpu_idle+0x10/0x20 [ 46.063930] default_idle_call+0x36/0x90 [ 46.067977] do_idle+0x386/0x570 [ 46.071345] ? arch_cpu_idle_exit+0x80/0x80 [ 46.075660] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 46.080748] ? complete+0x61/0x80 [ 46.084183] cpu_startup_entry+0x1b/0x20 [ 46.088232] start_secondary+0x404/0x5c0 [ 46.092280] ? set_cpu_sibling_map+0x1850/0x1850 [ 46.097021] secondary_startup_64+0xa4/0xb0 [ 46.102457] Kernel Offset: disabled [ 46.106122] Rebooting in 86400 seconds..