[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts. syzkaller login: [ 512.491222][ T6796] IPVS: ftp: loaded support on port[0] = 21 [ 512.575793][ T6796] chnl_net:caif_netlink_parms(): no params data found [ 512.627041][ T6796] bridge0: port 1(bridge_slave_0) entered blocking state [ 512.636155][ T6796] bridge0: port 1(bridge_slave_0) entered disabled state [ 512.645443][ T6796] device bridge_slave_0 entered promiscuous mode [ 512.654988][ T6796] bridge0: port 2(bridge_slave_1) entered blocking state [ 512.662753][ T6796] bridge0: port 2(bridge_slave_1) entered disabled state [ 512.671807][ T6796] device bridge_slave_1 entered promiscuous mode [ 512.691595][ T6796] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 512.703019][ T6796] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 512.729984][ T6796] team0: Port device team_slave_0 added [ 512.738239][ T6796] team0: Port device team_slave_1 added [ 512.756837][ T6796] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 512.763950][ T6796] 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. [ 512.792077][ T6796] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 512.804821][ T6796] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 512.813557][ T6796] 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. [ 512.840254][ T6796] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 512.902192][ T6796] device hsr_slave_0 entered promiscuous mode [ 512.969569][ T6796] device hsr_slave_1 entered promiscuous mode [ 513.094707][ T6796] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 513.153913][ T6796] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 513.201135][ T6796] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 513.241235][ T6796] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 513.296883][ T6796] bridge0: port 2(bridge_slave_1) entered blocking state [ 513.304150][ T6796] bridge0: port 2(bridge_slave_1) entered forwarding state [ 513.312273][ T6796] bridge0: port 1(bridge_slave_0) entered blocking state [ 513.319455][ T6796] bridge0: port 1(bridge_slave_0) entered forwarding state [ 513.365352][ T6796] 8021q: adding VLAN 0 to HW filter on device bond0 [ 513.380076][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 513.391924][ T2814] bridge0: port 1(bridge_slave_0) entered disabled state [ 513.400720][ T2814] bridge0: port 2(bridge_slave_1) entered disabled state [ 513.408611][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 513.422459][ T6796] 8021q: adding VLAN 0 to HW filter on device team0 [ 513.440665][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 513.450348][ T7007] bridge0: port 1(bridge_slave_0) entered blocking state [ 513.457440][ T7007] bridge0: port 1(bridge_slave_0) entered forwarding state [ 513.465442][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 513.474278][ T7007] bridge0: port 2(bridge_slave_1) entered blocking state [ 513.481580][ T7007] bridge0: port 2(bridge_slave_1) entered forwarding state [ 513.500698][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 513.510337][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 513.530594][ T6796] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 513.541257][ T6796] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 513.556714][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 513.567022][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 513.576821][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 513.586718][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 513.604197][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 513.612781][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 513.627951][ T6796] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 513.647812][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 513.656703][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 513.678970][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 513.687697][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 513.697938][ T6796] device veth0_vlan entered promiscuous mode [ 513.706790][ T7005] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 513.715378][ T7005] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 513.727671][ T6796] device veth1_vlan entered promiscuous mode [ 513.748016][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 513.758500][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 513.767726][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 513.776981][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 513.789524][ T6796] device veth0_macvtap entered promiscuous mode [ 513.800356][ T6796] device veth1_macvtap entered promiscuous mode [ 513.819654][ T6796] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 513.830062][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 513.838391][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 513.848522][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 513.860492][ T2814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 513.873688][ T6796] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 513.881387][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 513.890434][ T7007] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 619.083297][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 619.090421][ C1] rcu: 0-...0: (2 ticks this GP) idle=202/1/0x4000000000000000 softirq=9389/9390 fqs=5250 [ 619.102679][ C1] (detected by 1, t=10502 jiffies, g=8669, q=3614) [ 619.109381][ C1] Sending NMI from CPU 1 to CPUs 0: [ 619.115776][ C1] NMI backtrace for cpu 0 [ 619.115784][ C1] CPU: 0 PID: 6796 Comm: syz-executor971 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0 [ 619.115791][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 619.115795][ C1] RIP: 0010:__lock_acquire+0x177a/0x56e0 [ 619.115807][ C1] Code: 08 74 42 48 8d 7a 18 48 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 f6 29 00 00 48 8b 42 18 49 39 c6 0f 84 7b f5 ff ff 48 8d 7a 08 <48> 89 f8 48 c1 e8 03 42 80 3c 28 00 0f 85 bf 29 00 00 48 8b 52 08 [ 619.115812][ C1] RSP: 0018:ffffc90000007b90 EFLAGS: 00000097 [ 619.115821][ C1] RAX: 5e77cce67d15d0c3 RBX: 0000000000005ef4 RCX: ffffffff8159e5f3 [ 619.115827][ C1] RDX: ffffffff8bf40de0 RSI: 0000000000000008 RDI: ffffffff8bf40de8 [ 619.115833][ C1] RBP: ffff888095d6ed18 R08: 0000000000000000 R09: ffffffff8c5b09ef [ 619.115838][ C1] R10: fffffbfff18b613d R11: 0000000000000000 R12: ffff888095d6e440 [ 619.115844][ C1] R13: dffffc0000000000 R14: 5039a2e5e99f6d22 R15: 0000000000000001 [ 619.115851][ C1] FS: 0000000001622880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 619.115856][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 619.115862][ C1] CR2: 0000000020000610 CR3: 00000000a28fb000 CR4: 00000000001506f0 [ 619.115868][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 619.115874][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 619.115877][ C1] Call Trace: [ 619.115879][ C1] [ 619.115884][ C1] ? debug_object_deactivate+0x264/0x300 [ 619.115889][ C1] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 619.115893][ C1] ? lock_acquire+0x1f1/0xad0 [ 619.115897][ C1] ? advance_sched+0x4ab/0x990 [ 619.115901][ C1] ? find_held_lock+0x2d/0x110 [ 619.115905][ C1] lock_acquire+0x1f1/0xad0 [ 619.115909][ C1] ? __hrtimer_run_queues+0x252/0xfc0 [ 619.115913][ C1] ? lock_release+0x8d0/0x8d0 [ 619.115917][ C1] ? advance_sched+0x56d/0x990 [ 619.115927][ C1] ? lockdep_hardirqs_off+0x66/0xa0 [ 619.115931][ C1] _raw_spin_lock_irq+0x5b/0x80 [ 619.115936][ C1] ? __hrtimer_run_queues+0x252/0xfc0 [ 619.115940][ C1] __hrtimer_run_queues+0x252/0xfc0 [ 619.115944][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 619.115949][ C1] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 619.115953][ C1] hrtimer_interrupt+0x32a/0x930 [ 619.115958][ C1] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 619.115962][ C1] asm_call_on_stack+0xf/0x20 [ 619.115965][ C1] [ 619.115969][ C1] sysvec_apic_timer_interrupt+0xe0/0x120 [ 619.115974][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 619.115978][ C1] RIP: 0010:on_each_cpu+0x149/0x240 [ 619.115991][ C1] Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e6 00 00 00 48 83 3d 77 ff 4b 08 00 0f 84 af 00 00 00 e8 5c ef 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 4d ef 0a 00 bf 01 00 00 00 e8 03 86 e6 ff 31 ff [ 619.115995][ C1] RSP: 0018:ffffc90000dd7d70 EFLAGS: 00000293 [ 619.116004][ C1] RAX: 0000000000000000 RBX: 0000000000000293 RCX: 0000000000000000 [ 619.116010][ C1] RDX: ffff888095d6e440 RSI: ffffffff816900d4 RDI: 0000000000000293 [ 619.116016][ C1] RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 [ 619.116022][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 619.116028][ C1] R13: 0000000000000000 R14: ffffc90000dd7ed0 R15: ffffffffa0f41725 [ 619.116032][ C1] ? on_each_cpu+0x144/0x240 [ 619.116035][ C1] clock_was_set+0x18/0x20 [ 619.116039][ C1] do_settimeofday64+0x350/0x4e0 [ 619.116044][ C1] ? change_clocksource+0x200/0x200 [ 619.116047][ C1] ? capable+0xdd/0x100 [ 619.116052][ C1] do_sys_settimeofday64+0x1de/0x260 [ 619.116056][ C1] __x64_sys_clock_settime+0x197/0x260 [ 619.116060][ C1] ? exit_itimers+0x2d0/0x2d0 [ 619.116064][ C1] ? lock_is_held_type+0xb0/0xe0 [ 619.116068][ C1] ? do_syscall_64+0x1c/0xe0 [ 619.116072][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 619.116076][ C1] do_syscall_64+0x60/0xe0 [ 619.116081][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 619.116084][ C1] RIP: 0033:0x443879 [ 619.116088][ C1] Code: Bad RIP value. [ 619.116092][ C1] RSP: 002b:00007ffeb71b0e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 [ 619.116103][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443879 [ 619.116108][ C1] RDX: 0000000000443879 RSI: 0000000020000400 RDI: 0000000000000000 [ 619.116114][ C1] RBP: 00007ffeb71b0e30 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 619.116120][ C1] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffeb71b0e40 [ 619.116126][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000