[ 81.180302][ T27] audit: type=1800 audit(1576731376.990:25): pid=8979 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.204614][ T27] audit: type=1800 audit(1576731377.000:26): pid=8979 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.256526][ T27] audit: type=1800 audit(1576731377.000:27): pid=8979 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. [ 81.928304][ T9048] sshd (9048) used greatest stack depth: 22888 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. syzkaller login: [ 103.107380][ T9132] IPVS: ftp: loaded support on port[0] = 21 [ 103.179807][ T9132] chnl_net:caif_netlink_parms(): no params data found [ 103.211543][ T9132] bridge0: port 1(bridge_slave_0) entered blocking state [ 103.219615][ T9132] bridge0: port 1(bridge_slave_0) entered disabled state [ 103.228195][ T9132] device bridge_slave_0 entered promiscuous mode [ 103.236437][ T9132] bridge0: port 2(bridge_slave_1) entered blocking state [ 103.243570][ T9132] bridge0: port 2(bridge_slave_1) entered disabled state [ 103.251521][ T9132] device bridge_slave_1 entered promiscuous mode [ 103.269255][ T9132] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 103.280106][ T9132] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 103.300060][ T9132] team0: Port device team_slave_0 added [ 103.307389][ T9132] team0: Port device team_slave_1 added [ 103.386675][ T9132] device hsr_slave_0 entered promiscuous mode [ 103.455214][ T9132] device hsr_slave_1 entered promiscuous mode [ 103.529200][ T9132] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 103.587215][ T9132] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 103.656600][ T9132] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 103.716688][ T9132] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 103.773880][ T9132] bridge0: port 2(bridge_slave_1) entered blocking state [ 103.781077][ T9132] bridge0: port 2(bridge_slave_1) entered forwarding state [ 103.788936][ T9132] bridge0: port 1(bridge_slave_0) entered blocking state [ 103.796015][ T9132] bridge0: port 1(bridge_slave_0) entered forwarding state [ 103.832223][ T9132] 8021q: adding VLAN 0 to HW filter on device bond0 [ 103.846837][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 103.858788][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 103.877616][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 103.887098][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 103.899207][ T9132] 8021q: adding VLAN 0 to HW filter on device team0 [ 103.910180][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 103.918898][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 103.926078][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 103.938456][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 103.947230][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 103.954326][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 103.976430][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 103.985544][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 103.993871][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 104.006618][ T9132] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 104.018087][ T9132] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 104.027324][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 104.037165][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 104.054106][ T9135] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 104.062313][ T9135] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 104.074288][ T9132] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program [ 104.087891][ T9138] device tunl0 entered promiscuous mode [ 104.098343][ T9139] device gre0 entered promiscuous mode [ 104.108525][ T9140] batman_adv: batadv0: Adding interface: gretap0 [ 104.115012][ T9140] 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. [ 104.141409][ T9140] batman_adv: batadv0: Interface activated: gretap0 [ 104.151405][ T9140] device gretap0 entered promiscuous mode [ 104.157862][ T9140] batman_adv: batadv0: Interface deactivated: gretap0 [ 104.164770][ T9140] batman_adv: batadv0: Removing interface: gretap0 executing program [ 104.239447][ T9141] batman_adv: batadv0: Adding interface: erspan0 [ 104.246002][ T9141] 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. [ 104.272279][ T9141] batman_adv: batadv0: Interface activated: erspan0 [ 104.281954][ T9141] device erspan0 entered promiscuous mode [ 104.288074][ T9141] batman_adv: batadv0: Interface deactivated: erspan0 [ 104.294906][ T9141] batman_adv: batadv0: Removing interface: erspan0 [ 104.314659][ C1] ------------[ cut here ]------------ [ 104.320332][ C1] DEBUG_LOCKS_WARN_ON(1) [ 104.320404][ C1] WARNING: CPU: 1 PID: 0 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 [ 104.333671][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 104.340240][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.5.0-rc2-syzkaller #0 [ 104.348113][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.358160][ C1] Call Trace: [ 104.361425][ C1] [ 104.364260][ C1] dump_stack+0x197/0x210 [ 104.368571][ C1] ? mark_lock+0x1e0/0x1220 [ 104.373051][ C1] panic+0x2e3/0x75c [ 104.376926][ C1] ? add_taint.cold+0x16/0x16 [ 104.381621][ C1] ? __kasan_check_write+0x14/0x20 [ 104.386764][ C1] ? __warn.cold+0x14/0x3e [ 104.391155][ C1] ? __warn+0xd9/0x1cf [ 104.395203][ C1] ? mark_lock+0x22b/0x1220 [ 104.399696][ C1] __warn.cold+0x2f/0x3e [ 104.403915][ C1] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 104.409623][ C1] ? mark_lock+0x22b/0x1220 [ 104.414104][ C1] report_bug+0x289/0x300 [ 104.418427][ C1] do_error_trap+0x11b/0x200 [ 104.422997][ C1] do_invalid_op+0x37/0x50 [ 104.427389][ C1] ? mark_lock+0x22b/0x1220 [ 104.431899][ C1] invalid_op+0x23/0x30 [ 104.436046][ C1] RIP: 0010:mark_lock+0x22b/0x1220 [ 104.441144][ 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 [ 104.460737][ C1] RSP: 0018:ffffc90000da8308 EFLAGS: 00010086 [ 104.466788][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 104.474745][ C1] RDX: 0000000000000100 RSI: ffffffff815e8906 RDI: fffff520001b5053 [ 104.483393][ C1] RBP: ffffc90000da8358 R08: ffff8880a99fa340 R09: fffffbfff1333569 [ 104.491347][ C1] R10: fffffbfff1333568 R11: ffffffff8999ab43 R12: 0000000000000004 [ 104.499347][ C1] R13: ffff8880a99facc8 R14: 0000000000000001 R15: 00000000000425dc [ 104.507482][ C1] ? vprintk_func+0x86/0x189 [ 104.512076][ C1] ? mark_lock+0x22b/0x1220 [ 104.516581][ C1] __lock_acquire+0x1e8e/0x4a00 [ 104.521433][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 104.527651][ C1] ? netif_skb_features+0x6c2/0xb90 [ 104.532824][ C1] ? mark_held_locks+0xf0/0xf0 [ 104.537578][ C1] ? mark_lock+0xc2/0x1220 [ 104.541971][ C1] lock_acquire+0x190/0x410 [ 104.546451][ C1] ? sch_direct_xmit+0x2e0/0xd30 [ 104.551367][ C1] _raw_spin_lock+0x2f/0x40 [ 104.555859][ C1] ? sch_direct_xmit+0x2e0/0xd30 [ 104.560786][ C1] sch_direct_xmit+0x2e0/0xd30 [ 104.565529][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.571750][ C1] ? dev_watchdog+0xca0/0xca0 [ 104.576405][ C1] ? lock_acquire+0x140/0x410 [ 104.581068][ C1] __dev_queue_xmit+0x2707/0x35c0 [ 104.586098][ C1] ? __kasan_check_read+0x11/0x20 [ 104.591113][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 104.596380][ C1] ? ip6_finish_output2+0x109a/0x25c0 [ 104.601732][ C1] ? __kasan_check_read+0x11/0x20 [ 104.606738][ C1] ? mark_held_locks+0xa4/0xf0 [ 104.611479][ C1] dev_queue_xmit+0x18/0x20 [ 104.615962][ C1] ? dev_queue_xmit+0x18/0x20 [ 104.620664][ C1] neigh_resolve_output+0x5c4/0x990 [ 104.625846][ C1] ip6_finish_output2+0x109a/0x25c0 [ 104.631022][ C1] ? ip6_frag_next+0xb20/0xb20 [ 104.635765][ C1] ? rcu_read_lock_held+0x9c/0xb0 [ 104.640768][ C1] ? __kasan_check_read+0x11/0x20 [ 104.645791][ C1] __ip6_finish_output+0x444/0xaa0 [ 104.650884][ C1] ? __ip6_finish_output+0x444/0xaa0 [ 104.656149][ C1] ip6_finish_output+0x38/0x1f0 [ 104.660973][ C1] ip6_output+0x25e/0x880 [ 104.665292][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 104.670379][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 104.675745][ C1] ? __ip6_finish_output+0xaa0/0xaa0 [ 104.681085][ C1] ? xfrm_lookup+0x38/0x50 [ 104.685588][ C1] mld_sendpack+0x9c2/0xed0 [ 104.690091][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 104.695359][ C1] ? mld_ifc_timer_expire+0x43e/0x950 [ 104.700710][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 104.706061][ C1] mld_ifc_timer_expire+0x454/0x950 [ 104.711236][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 104.716864][ C1] call_timer_fn+0x1ac/0x780 [ 104.721457][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 104.726815][ C1] ? msleep_interruptible+0x150/0x150 [ 104.732214][ C1] ? run_timer_softirq+0x6b1/0x1790 [ 104.737394][ C1] ? trace_hardirqs_on+0x67/0x240 [ 104.742484][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 104.747844][ C1] ? mld_dad_timer_expire+0x230/0x230 [ 104.753195][ C1] run_timer_softirq+0x6c3/0x1790 [ 104.758217][ C1] ? add_timer+0x930/0x930 [ 104.762628][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 104.768776][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 104.774305][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 104.780283][ C1] ? trace_hardirqs_on+0x67/0x240 [ 104.785302][ C1] __do_softirq+0x262/0x98c [ 104.789837][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 104.794716][ C1] irq_exit+0x19b/0x1e0 [ 104.798872][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 104.804397][ C1] apic_timer_interrupt+0xf/0x20 [ 104.809320][ C1] [ 104.812251][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 104.817607][ 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 [ 104.837212][ C1] RSP: 0018:ffffc90000d3fd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 104.845599][ C1] RAX: 1ffffffff132669e RBX: ffff8880a99fa340 RCX: 0000000000000000 [ 104.853550][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a99fabd4 [ 104.861499][ C1] RBP: ffffc90000d3fd98 R08: ffff8880a99fa340 R09: 0000000000000000 [ 104.869454][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 104.877407][ C1] R13: ffffffff8a798c80 R14: 0000000000000000 R15: 0000000000000001 [ 104.885375][ C1] ? default_idle+0x4e/0x360 [ 104.889942][ C1] arch_cpu_idle+0xa/0x10 [ 104.894248][ C1] default_idle_call+0x84/0xb0 [ 104.898987][ C1] do_idle+0x3c8/0x6e0 [ 104.903030][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 104.908030][ C1] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 104.913817][ C1] ? complete+0x61/0x80 [ 104.917960][ C1] cpu_startup_entry+0x1b/0x20 [ 104.922702][ C1] start_secondary+0x2f4/0x410 [ 104.927443][ C1] ? set_cpu_sibling_map+0x2140/0x2140 [ 104.932880][ C1] secondary_startup_64+0xa4/0xb0 [ 104.939076][ C1] Kernel Offset: disabled [ 104.943400][ C1] Rebooting in 86400 seconds..