[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 61.636460][ T27] audit: type=1800 audit(1564029412.369:25): pid=9070 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 61.680521][ T27] audit: type=1800 audit(1564029412.369:26): pid=9070 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 61.730512][ T27] audit: type=1800 audit(1564029412.369:27): pid=9070 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.87' (ECDSA) to the list of known hosts.
syzkaller login: [ 1018.831868][ T9224] IPVS: ftp: loaded support on port[0] = 21
[ 1018.895925][ T9224] chnl_net:caif_netlink_parms(): no params data found
[ 1018.925458][ T9224] bridge0: port 1(bridge_slave_0) entered blocking state
[ 1018.933120][ T9224] bridge0: port 1(bridge_slave_0) entered disabled state
[ 1018.941459][ T9224] device bridge_slave_0 entered promiscuous mode
[ 1018.949453][ T9224] bridge0: port 2(bridge_slave_1) entered blocking state
[ 1018.956748][ T9224] bridge0: port 2(bridge_slave_1) entered disabled state
[ 1018.964470][ T9224] device bridge_slave_1 entered promiscuous mode
[ 1018.982426][ T9224] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 1018.993125][ T9224] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 1019.011757][ T9224] team0: Port device team_slave_0 added
[ 1019.018608][ T9224] team0: Port device team_slave_1 added
[ 1019.102215][ T9224] device hsr_slave_0 entered promiscuous mode
[ 1019.180399][ T9224] device hsr_slave_1 entered promiscuous mode
[ 1019.238767][ T9224] bridge0: port 2(bridge_slave_1) entered blocking state
[ 1019.246053][ T9224] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 1019.254144][ T9224] bridge0: port 1(bridge_slave_0) entered blocking state
[ 1019.261280][ T9224] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 1019.296690][ T9224] 8021q: adding VLAN 0 to HW filter on device bond0
[ 1019.308126][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 1019.327944][ T12] bridge0: port 1(bridge_slave_0) entered disabled state
[ 1019.336466][ T12] bridge0: port 2(bridge_slave_1) entered disabled state
[ 1019.345175][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 1019.356493][ T9224] 8021q: adding VLAN 0 to HW filter on device team0
[ 1019.367180][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 1019.375889][ T9228] bridge0: port 1(bridge_slave_0) entered blocking state
[ 1019.382987][ T9228] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 1019.401131][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 1019.409521][ T9228] bridge0: port 2(bridge_slave_1) entered blocking state
[ 1019.416643][ T9228] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 1019.425428][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 1019.439547][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 1019.447652][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 1019.456117][ T9228] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 1019.468100][ T9224] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 1019.479475][ T9224] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 1019.487306][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
executing program
[ 1019.506372][ T9224] 8021q: adding VLAN 0 to HW filter on device batadv0
executing program
executing program
executing program
[ 1020.650266][ C1] ------------[ cut here ]------------
[ 1020.655945][ C1] refcount_t: increment on 0; use-after-free.
[ 1020.662376][ C1] WARNING: CPU: 1 PID: 0 at lib/refcount.c:156 refcount_inc_checked+0x61/0x70
[ 1020.671223][ C1] Kernel panic - not syncing: panic_on_warn set ...
[ 1020.677926][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.2.0+ #97
[ 1020.684771][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 1020.694818][ C1] Call Trace:
[ 1020.698104][ C1]
[ 1020.700992][ C1] dump_stack+0x172/0x1f0
[ 1020.705322][ C1] ? refcount_inc_not_zero_checked+0x1f0/0x200
[ 1020.711463][ C1] panic+0x2dc/0x755
[ 1020.715352][ C1] ? add_taint.cold+0x16/0x16
[ 1020.720108][ C1] ? __kasan_check_write+0x14/0x20
[ 1020.725290][ C1] ? __warn.cold+0x5/0x4c
[ 1020.729613][ C1] ? __warn+0xe7/0x1e0
[ 1020.733722][ C1] ? refcount_inc_checked+0x61/0x70
[ 1020.738911][ C1] __warn.cold+0x20/0x4c
[ 1020.743155][ C1] ? vprintk_emit+0x1ea/0x700
[ 1020.747834][ C1] ? refcount_inc_checked+0x61/0x70
[ 1020.753056][ C1] report_bug+0x263/0x2b0
[ 1020.757432][ C1] do_error_trap+0x11b/0x200
[ 1020.762058][ C1] do_invalid_op+0x37/0x50
[ 1020.766469][ C1] ? refcount_inc_checked+0x61/0x70
[ 1020.771697][ C1] invalid_op+0x14/0x20
[ 1020.775884][ C1] RIP: 0010:refcount_inc_checked+0x61/0x70
[ 1020.781680][ C1] Code: 1d 3f 6e 64 06 31 ff 89 de e8 cb d2 35 fe 84 db 75 dd e8 82 d1 35 fe 48 c7 c7 40 09 c6 87 c6 05 1f 6e 64 06 01 e8 77 39 07 fe <0f> 0b eb c1 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41
[ 1020.801534][ C1] RSP: 0018:ffff8880ae909bf0 EFLAGS: 00010282
[ 1020.807594][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 1020.815555][ C1] RDX: 0000000000000100 RSI: ffffffff815c3a26 RDI: ffffed1015d21370
[ 1020.823511][ C1] RBP: ffff8880ae909c00 R08: ffff8880a98cc340 R09: fffffbfff14a7757
[ 1020.831465][ C1] R10: fffffbfff14a7756 R11: ffffffff8a53bab7 R12: ffff8880906d1700
[ 1020.839418][ C1] R13: ffff8880906d16e8 R14: ffff88809fff0dc8 R15: ffff88809fff0da0
[ 1020.847391][ C1] ? vprintk_func+0x86/0x189
[ 1020.852019][ C1] nr_insert_socket+0x2d/0xe0
[ 1020.856687][ C1] nr_rx_frame+0x1605/0x1e73
[ 1020.861274][ C1] nr_loopback_timer+0x7b/0x170
[ 1020.866185][ C1] call_timer_fn+0x1ac/0x780
[ 1020.870765][ C1] ? nr_process_rx_frame+0x1540/0x1540
[ 1020.876306][ C1] ? msleep_interruptible+0x150/0x150
[ 1020.881663][ C1] ? run_timer_softirq+0x685/0x17a0
[ 1020.886853][ C1] ? trace_hardirqs_on+0x67/0x240
[ 1020.891865][ C1] ? __kasan_check_read+0x11/0x20
[ 1020.896873][ C1] ? nr_process_rx_frame+0x1540/0x1540
[ 1020.902318][ C1] ? nr_process_rx_frame+0x1540/0x1540
[ 1020.907829][ C1] run_timer_softirq+0x697/0x17a0
[ 1020.912855][ C1] ? add_timer+0x930/0x930
[ 1020.917262][ C1] ? kvm_clock_read+0x18/0x30
[ 1020.921927][ C1] ? kvm_sched_clock_read+0x9/0x20
[ 1020.927022][ C1] ? sched_clock+0x2e/0x50
[ 1020.931443][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 1020.937715][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 1020.943967][ C1] __do_softirq+0x262/0x98c
[ 1020.948459][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 1020.953310][ C1] irq_exit+0x19b/0x1e0
[ 1020.957559][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 1020.963089][ C1] apic_timer_interrupt+0xf/0x20
[ 1020.968014][ C1]
[ 1020.970981][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 1020.976341][ C1] Code: b8 94 73 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 34 25 4f 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 25 4f 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 0e 56 27 fa e8 c9
[ 1020.995931][ C1] RSP: 0018:ffff8880a98dfd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 1021.004326][ C1] RAX: 1ffffffff11a5e05 RBX: ffff8880a98cc340 RCX: 0000000000000000
[ 1021.012281][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98ccbcc
[ 1021.020359][ C1] RBP: ffff8880a98dfd98 R08: ffff8880a98cc340 R09: 0000000000000000
[ 1021.028318][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 1021.036274][ C1] R13: ffffffff89a4f778 R14: 0000000000000000 R15: 0000000000000001
[ 1021.044290][ C1] ? default_idle+0x4e/0x360
[ 1021.048886][ C1] arch_cpu_idle+0xa/0x10
[ 1021.053218][ C1] default_idle_call+0x84/0xb0
[ 1021.057971][ C1] do_idle+0x413/0x760
[ 1021.062124][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 1021.067276][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0
[ 1021.073110][ C1] ? complete+0x61/0x80
[ 1021.077264][ C1] cpu_startup_entry+0x1b/0x20
[ 1021.082056][ C1] start_secondary+0x315/0x430
[ 1021.086814][ C1] ? set_cpu_sibling_map+0x2180/0x2180
[ 1021.092268][ C1] secondary_startup_64+0xa4/0xb0
[ 1021.098489][ C1] Kernel Offset: disabled
[ 1021.102905][ C1] Rebooting in 86400 seconds..