[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. syzkaller login: [ 897.824646][ T6815] IPVS: ftp: loaded support on port[0] = 21 [ 897.909700][ T6815] chnl_net:caif_netlink_parms(): no params data found [ 897.961504][ T6815] bridge0: port 1(bridge_slave_0) entered blocking state [ 897.970665][ T6815] bridge0: port 1(bridge_slave_0) entered disabled state [ 897.979296][ T6815] device bridge_slave_0 entered promiscuous mode [ 897.988187][ T6815] bridge0: port 2(bridge_slave_1) entered blocking state [ 897.995281][ T6815] bridge0: port 2(bridge_slave_1) entered disabled state [ 898.003852][ T6815] device bridge_slave_1 entered promiscuous mode [ 898.024273][ T6815] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 898.035221][ T6815] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 898.057172][ T6815] team0: Port device team_slave_0 added [ 898.064459][ T6815] team0: Port device team_slave_1 added [ 898.083040][ T6815] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 898.090062][ T6815] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) 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. [ 898.116104][ T6815] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 898.128458][ T6815] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 898.135484][ T6815] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) 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. [ 898.161501][ T6815] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 898.228283][ T6815] device hsr_slave_0 entered promiscuous mode [ 898.255992][ T6815] device hsr_slave_1 entered promiscuous mode [ 898.404740][ T6815] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 898.458803][ T6815] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 898.518138][ T6815] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 898.558921][ T6815] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 898.622337][ T6815] bridge0: port 2(bridge_slave_1) entered blocking state [ 898.629556][ T6815] bridge0: port 2(bridge_slave_1) entered forwarding state [ 898.637567][ T6815] bridge0: port 1(bridge_slave_0) entered blocking state [ 898.644634][ T6815] bridge0: port 1(bridge_slave_0) entered forwarding state [ 898.689960][ T6815] 8021q: adding VLAN 0 to HW filter on device bond0 [ 898.704264][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 898.716268][ T7025] bridge0: port 1(bridge_slave_0) entered disabled state [ 898.724468][ T7025] bridge0: port 2(bridge_slave_1) entered disabled state [ 898.733569][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 898.747613][ T6815] 8021q: adding VLAN 0 to HW filter on device team0 [ 898.760075][ T2507] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 898.768798][ T2507] bridge0: port 1(bridge_slave_0) entered blocking state [ 898.775969][ T2507] bridge0: port 1(bridge_slave_0) entered forwarding state [ 898.798186][ T7027] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 898.807692][ T7027] bridge0: port 2(bridge_slave_1) entered blocking state [ 898.814745][ T7027] bridge0: port 2(bridge_slave_1) entered forwarding state [ 898.838055][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 898.847332][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 898.856139][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 898.864945][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 898.878082][ T6815] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 898.887292][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 898.906121][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 898.913586][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 898.929633][ T6815] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 898.948504][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 898.958471][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 898.979389][ T3842] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 898.988050][ T3842] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 899.001263][ T6815] device veth0_vlan entered promiscuous mode [ 899.008100][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 899.017433][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 899.030626][ T6815] device veth1_vlan entered promiscuous mode [ 899.052353][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 899.061941][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 899.070310][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 899.079295][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 899.091906][ T6815] device veth0_macvtap entered promiscuous mode [ 899.102148][ T6815] device veth1_macvtap entered promiscuous mode [ 899.119959][ T6815] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 899.127534][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 899.135854][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 899.144097][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 899.153340][ T7024] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 899.166394][ T6815] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 899.173967][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 899.184302][ T7025] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 908.178316][ T0] NOHZ: local_softirq_pending 08 [ 928.657064][ T0] NOHZ: local_softirq_pending 08 [ 969.616985][ T0] NOHZ: local_softirq_pending 08 [ 990.096991][ T0] NOHZ: local_softirq_pending 08 [ 1004.355389][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 1004.362541][ C1] rcu: 0-...0: (2 ticks this GP) idle=1da/1/0x4000000000000000 softirq=10179/10179 fqs=5250 [ 1004.373044][ C1] (detected by 1, t=10502 jiffies, g=9089, q=491) [ 1004.379554][ C1] Sending NMI from CPU 1 to CPUs 0: [ 1004.386911][ C1] NMI backtrace for cpu 0 [ 1004.386919][ C1] CPU: 0 PID: 6815 Comm: syz-executor577 Not tainted 5.8.0-rc2-syzkaller #0 [ 1004.386926][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1004.386931][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 [ 1004.386944][ C1] Code: 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 cc fe ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 <48> 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 ae fe ff ff 0f 1f 40 00 [ 1004.386949][ C1] RSP: 0018:ffffc90000007de0 EFLAGS: 00000046 [ 1004.386958][ C1] RAX: 0000000000010202 RBX: 0000000000000000 RCX: 0000000000000000 [ 1004.386964][ C1] RDX: ffff8880918965c0 RSI: 0000000000000000 RDI: 000000000000003f [ 1004.386970][ C1] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff888091896e88 [ 1004.386976][ C1] R10: fffffbfff155caa9 R11: 0000000000000000 R12: ffff8880ae627740 [ 1004.386982][ C1] R13: ffff8880ae627840 R14: ffff88809e559340 R15: dffffc0000000000 [ 1004.386988][ C1] FS: 00000000006e9880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 1004.386993][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1004.386999][ C1] CR2: 0000000020000610 CR3: 00000000a7343000 CR4: 00000000001406f0 [ 1004.387005][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1004.387011][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1004.387016][ C1] Call Trace: [ 1004.387020][ C1] [ 1004.387024][ C1] __hrtimer_run_queues+0x200/0xfc0 [ 1004.387029][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 1004.387033][ C1] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 1004.387037][ C1] hrtimer_interrupt+0x32a/0x930 [ 1004.387042][ C1] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 1004.387046][ C1] asm_call_on_stack+0xf/0x20 [ 1004.387049][ C1] [ 1004.387054][ C1] sysvec_apic_timer_interrupt+0x18f/0x220 [ 1004.387059][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 1004.387064][ C1] RIP: 0010:_raw_spin_unlock_irqrestore+0x8c/0xe0 [ 1004.387076][ C1] Code: 48 c7 c0 40 b5 b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 37 48 83 3d ab 0c cc 01 00 74 22 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 45 65 66 f9 65 8b 05 0e 56 19 78 [ 1004.387080][ C1] RSP: 0018:ffffc900019d72c0 EFLAGS: 00000286 [ 1004.387089][ C1] RAX: 1ffffffff13696a8 RBX: 0000000000000286 RCX: 1ffffffff155d0f2 [ 1004.387095][ C1] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 1004.387101][ C1] RBP: ffff88809e5592e8 R08: 0000000000000000 R09: 0000000000000001 [ 1004.387107][ C1] R10: fffffbfff18b215d R11: 0000000000000000 R12: 0000000000000286 [ 1004.387113][ C1] R13: 161f1b8dc6fbfcc5 R14: ffff88809e559000 R15: 0000000000000000 [ 1004.387117][ C1] taprio_change+0x1fdc/0x2960 [ 1004.387121][ C1] ? taprio_peek_soft+0x5e0/0x5e0 [ 1004.387125][ C1] ? mutex_is_locked+0xe/0x40 [ 1004.387129][ C1] ? rtnl_is_locked+0x11/0x20 [ 1004.387134][ C1] ? qdisc_hash_add+0x228/0x350 [ 1004.387138][ C1] taprio_init+0x52e/0x670 [ 1004.387142][ C1] ? taprio_change+0x2960/0x2960 [ 1004.387146][ C1] qdisc_create+0x4b6/0x12e0 [ 1004.387150][ C1] ? tc_get_qdisc+0xad0/0xad0 [ 1004.387154][ C1] ? __nla_parse+0x3d/0x4a [ 1004.387158][ C1] tc_modify_qdisc+0x4c8/0x1990 [ 1004.387162][ C1] ? rtnetlink_rcv_msg+0x3f9/0xad0 [ 1004.387167][ C1] ? qdisc_create+0x12e0/0x12e0 [ 1004.387171][ C1] ? qdisc_create+0x12e0/0x12e0 [ 1004.387175][ C1] rtnetlink_rcv_msg+0x44e/0xad0 [ 1004.387180][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 1004.387184][ C1] ? lock_acquire+0x1f1/0xad0 [ 1004.387188][ C1] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 1004.387192][ C1] netlink_rcv_skb+0x15a/0x430 [ 1004.387197][ C1] ? rtnetlink_put_metrics+0x510/0x510 [ 1004.387201][ C1] ? netlink_ack+0xa10/0xa10 [ 1004.387205][ C1] netlink_unicast+0x533/0x7d0 [ 1004.387209][ C1] ? netlink_attachskb+0x810/0x810 [ 1004.387214][ C1] ? _copy_from_iter_full+0x247/0x890 [ 1004.387218][ C1] ? __phys_addr+0x9a/0x110 [ 1004.387222][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 1004.387226][ C1] ? __check_object_size+0x171/0x3e4 [ 1004.387230][ C1] netlink_sendmsg+0x856/0xd90 [ 1004.387234][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 1004.387239][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 1004.387243][ C1] sock_sendmsg+0xcf/0x120 [ 1004.387247][ C1] ____sys_sendmsg+0x6e8/0x810 [ 1004.387251][ C1] ? kernel_sendmsg+0x50/0x50 [ 1004.387255][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 1004.387259][ C1] ? mark_lock+0xbc/0x1710 [ 1004.387263][ C1] ? __lock_acquire+0xc1e/0x56e0 [ 1004.387267][ C1] ___sys_sendmsg+0xf3/0x170 [ 1004.387271][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 1004.387276][ C1] ? check_preemption_disabled+0x38/0x220 [ 1004.387280][ C1] ? percpu_counter_add_batch+0x126/0x180 [ 1004.387285][ C1] ? find_held_lock+0x2d/0x110 [ 1004.387289][ C1] ? __fd_install+0x1b4/0x600 [ 1004.387293][ C1] ? lock_downgrade+0x820/0x820 [ 1004.387297][ C1] ? __fget_light+0x215/0x280 [ 1004.387301][ C1] __sys_sendmsg+0xe5/0x1b0 [ 1004.387305][ C1] ? __sys_sendmsg_sock+0xb0/0xb0 [ 1004.387309][ C1] ? do_syscall_64+0x1c/0xe0 [ 1004.387314][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 1004.387318][ C1] do_syscall_64+0x60/0xe0 [ 1004.387323][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1004.387326][ C1] RIP: 0033:0x443799 [ 1004.387330][ C1] Code: Bad RIP value. [ 1004.387334][ C1] RSP: 002b:00007ffe34d2c198 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 1004.387345][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443799 [ 1004.387351][ C1] RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000004 [ 1004.387357][ C1] RBP: 00007ffe34d2c1a0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 1004.387362][ C1] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffe34d2c1b0 [ 1004.387368][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1004.387375][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 1010.577056][ T0] NOHZ: local_softirq_pending 08