[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.241070][ T26] audit: type=1800 audit(1576719891.538:25): pid=8808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.272509][ T26] audit: type=1800 audit(1576719891.548:26): pid=8808 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.326783][ T26] audit: type=1800 audit(1576719891.548:27): pid=8808 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[ 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 '10.128.0.13' (ECDSA) to the list of known hosts. syzkaller login: [ 70.371056][ T8961] IPVS: ftp: loaded support on port[0] = 21 [ 70.429450][ T8961] chnl_net:caif_netlink_parms(): no params data found [ 70.456586][ T8961] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.464009][ T8961] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.471539][ T8961] device bridge_slave_0 entered promiscuous mode [ 70.479386][ T8961] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.486550][ T8961] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.494149][ T8961] device bridge_slave_1 entered promiscuous mode [ 70.510678][ T8961] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.521825][ T8961] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.540631][ T8961] team0: Port device team_slave_0 added [ 70.548012][ T8961] team0: Port device team_slave_1 added [ 70.624785][ T8961] device hsr_slave_0 entered promiscuous mode [ 70.682900][ T8961] device hsr_slave_1 entered promiscuous mode [ 70.755410][ T8961] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 70.824618][ T8961] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 70.864694][ T8961] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 70.904587][ T8961] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 70.951802][ T8961] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.958919][ T8961] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.966606][ T8961] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.973724][ T8961] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.009315][ T8961] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.021047][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.040922][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.059467][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.067344][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 71.079492][ T8961] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.089346][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.097849][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.104911][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.123446][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.131705][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.138792][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.147495][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.157521][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.165705][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.179644][ T8961] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 71.190218][ T8961] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 71.201603][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 71.211355][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.219871][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.234667][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.242059][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.252819][ T8961] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program [ 71.264540][ T8966] device tunl0 entered promiscuous mode [ 71.274753][ T8967] device gre0 entered promiscuous mode [ 71.284357][ T8968] batman_adv: batadv0: Adding interface: gretap0 [ 71.290701][ T8968] batman_adv: batadv0: The MTU of interface gretap0 is too small (1462) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 71.317456][ T8968] batman_adv: batadv0: Interface activated: gretap0 [ 71.327849][ T8968] device gretap0 entered promiscuous mode [ 71.334183][ T8968] batman_adv: batadv0: Interface deactivated: gretap0 [ 71.340985][ T8968] batman_adv: batadv0: Removing interface: gretap0 executing program [ 71.437153][ T8969] batman_adv: batadv0: Adding interface: erspan0 [ 71.443545][ T8969] batman_adv: batadv0: The MTU of interface erspan0 is too small (1450) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 71.469922][ T8969] batman_adv: batadv0: Interface activated: erspan0 [ 71.478994][ T8969] device erspan0 entered promiscuous mode [ 71.485101][ T8969] batman_adv: batadv0: Interface deactivated: erspan0 [ 71.491839][ T8969] batman_adv: batadv0: Removing interface: erspan0 [ 71.512616][ C1] ------------[ cut here ]------------ [ 71.518089][ C1] DEBUG_LOCKS_WARN_ON(1) [ 71.518148][ C1] WARNING: CPU: 1 PID: 0 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 [ 71.531493][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 71.538061][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc2-syzkaller #0 [ 71.545916][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.556172][ C1] Call Trace: [ 71.559425][ C1] [ 71.562281][ C1] dump_stack+0x197/0x210 [ 71.566584][ C1] ? mark_lock+0x1e0/0x1220 [ 71.571056][ C1] panic+0x2e3/0x75c [ 71.574924][ C1] ? add_taint.cold+0x16/0x16 [ 71.579670][ C1] ? __kasan_check_write+0x14/0x20 [ 71.584778][ C1] ? __warn.cold+0x14/0x3e [ 71.589161][ C1] ? __warn+0xd9/0x1cf [ 71.593202][ C1] ? mark_lock+0x22b/0x1220 [ 71.597672][ C1] __warn.cold+0x2f/0x3e [ 71.601885][ C1] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 71.607572][ C1] ? mark_lock+0x22b/0x1220 [ 71.612061][ C1] report_bug+0x289/0x300 [ 71.616368][ C1] do_error_trap+0x11b/0x200 [ 71.620927][ C1] do_invalid_op+0x37/0x50 [ 71.625311][ C1] ? mark_lock+0x22b/0x1220 [ 71.629786][ C1] invalid_op+0x23/0x30 [ 71.633909][ C1] RIP: 0010:mark_lock+0x22b/0x1220 [ 71.638988][ C1] Code: d0 7c 08 84 d2 0f 85 a8 0e 00 00 44 8b 1d 1d 24 1f 09 45 85 db 75 b6 48 c7 c6 40 95 2b 88 48 c7 c7 80 95 2b 88 e8 14 3b eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 60 a5 63 8b e8 10 2c 58 00 e9 [ 71.658560][ C1] RSP: 0018:ffffc90000da8308 EFLAGS: 00010086 [ 71.664597][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 71.672550][ C1] RDX: 0000000000000100 RSI: ffffffff815e8906 RDI: fffff520001b5053 [ 71.680500][ C1] RBP: ffffc90000da8358 R08: ffff8880a99fa340 R09: fffffbfff1333569 [ 71.688440][ C1] R10: fffffbfff1333568 R11: ffffffff8999ab43 R12: 0000000000000004 [ 71.696394][ C1] R13: ffff8880a99facc8 R14: 0000000000000001 R15: 00000000000425dd [ 71.704361][ C1] ? vprintk_func+0x86/0x189 [ 71.708920][ C1] ? mark_lock+0x22b/0x1220 [ 71.713389][ C1] __lock_acquire+0x1e8e/0x4a00 [ 71.718209][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 71.724435][ C1] ? netif_skb_features+0x6c2/0xb90 [ 71.729597][ C1] ? mark_held_locks+0xf0/0xf0 [ 71.734330][ C1] ? mark_lock+0xc2/0x1220 [ 71.738713][ C1] lock_acquire+0x190/0x410 [ 71.743182][ C1] ? sch_direct_xmit+0x2e0/0xd30 [ 71.748089][ C1] _raw_spin_lock+0x2f/0x40 [ 71.752602][ C1] ? sch_direct_xmit+0x2e0/0xd30 [ 71.757548][ C1] sch_direct_xmit+0x2e0/0xd30 [ 71.762286][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.768501][ C1] ? dev_watchdog+0xca0/0xca0 [ 71.773167][ C1] ? lock_acquire+0x140/0x410 [ 71.777816][ C1] __dev_queue_xmit+0x2707/0x35c0 [ 71.782811][ C1] ? __kasan_check_read+0x11/0x20 [ 71.787806][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 71.793061][ C1] ? ip6_finish_output2+0x109a/0x25c0 [ 71.798402][ C1] ? __kasan_check_read+0x11/0x20 [ 71.803396][ C1] ? mark_held_locks+0xa4/0xf0 [ 71.808133][ C1] dev_queue_xmit+0x18/0x20 [ 71.812613][ C1] ? dev_queue_xmit+0x18/0x20 [ 71.817266][ C1] neigh_resolve_output+0x5c4/0x990 [ 71.822440][ C1] ip6_finish_output2+0x109a/0x25c0 [ 71.827617][ C1] ? ip6_mtu+0x2e6/0x450 [ 71.831833][ C1] ? ip6_frag_next+0xb20/0xb20 [ 71.836565][ C1] ? rcu_read_lock_held+0x9c/0xb0 [ 71.841556][ C1] ? __kasan_check_read+0x11/0x20 [ 71.846559][ C1] __ip6_finish_output+0x444/0xaa0 [ 71.851637][ C1] ? __ip6_finish_output+0x444/0xaa0 [ 71.856892][ C1] ip6_finish_output+0x38/0x1f0 [ 71.861707][ C1] ip6_output+0x25e/0x880 [ 71.866004][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 71.871081][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 71.876420][ C1] ? __ip6_finish_output+0xaa0/0xaa0 [ 71.881681][ C1] ? xfrm_lookup+0x38/0x50 [ 71.886066][ C1] mld_sendpack+0x9c2/0xed0 [ 71.890539][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 71.895793][ C1] ? mld_ifc_timer_expire+0x43e/0x950 [ 71.901133][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 71.906479][ C1] mld_ifc_timer_expire+0x454/0x950 [ 71.911644][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.917160][ C1] call_timer_fn+0x1ac/0x780 [ 71.921720][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 71.927100][ C1] ? msleep_interruptible+0x150/0x150 [ 71.932444][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 71.937615][ C1] ? trace_hardirqs_on+0x67/0x240 [ 71.942615][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 71.948024][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 71.953372][ C1] run_timer_softirq+0x6c3/0x1790 [ 71.958379][ C1] ? add_timer+0x930/0x930 [ 71.962773][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 71.968900][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 71.974418][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 71.980368][ C1] ? trace_hardirqs_on+0x67/0x240 [ 71.985389][ C1] __do_softirq+0x262/0x98c [ 71.989859][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 71.994682][ C1] irq_exit+0x19b/0x1e0 [ 71.998849][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 72.004366][ C1] apic_timer_interrupt+0xf/0x20 [ 72.009271][ C1] [ 72.012181][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 72.017530][ C1] Code: 78 9a ea f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d 94 4a 60 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 4a 60 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 8c 9a f9 e8 49 [ 72.037103][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 72.045488][ C1] RAX: 1ffffffff132669e RBX: ffff8880a99fa340 RCX: 0000000000000000 [ 72.053428][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fabd4 [ 72.061565][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fa340 R09: 0000000000000000 [ 72.069519][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 72.077468][ C1] R13: ffffffff8a798c80 R14: 0000000000000000 R15: 0000000000000001 [ 72.085453][ C1] ? default_idle+0x4e/0x360 [ 72.090015][ C1] arch_cpu_idle+0xa/0x10 [ 72.094317][ C1] default_idle_call+0x84/0xb0 [ 72.099050][ C1] do_idle+0x3c8/0x6e0 [ 72.103092][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 72.108094][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 72.113870][ C1] ? complete+0x61/0x80 [ 72.118002][ C1] cpu_startup_entry+0x1b/0x20 [ 72.122741][ C1] start_secondary+0x2f4/0x410 [ 72.127477][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 72.132907][ C1] secondary_startup_64+0xa4/0xb0 [ 72.139189][ C1] Kernel Offset: disabled [ 72.143500][ C1] Rebooting in 86400 seconds..