[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.48' (ECDSA) to the list of known hosts. 2020/11/22 15:29:12 parsed 1 programs 2020/11/22 15:29:13 executed programs: 0 syzkaller login: [ 1583.083536][ T8508] IPVS: ftp: loaded support on port[0] = 21 [ 1583.240351][ T8508] chnl_net:caif_netlink_parms(): no params data found [ 1583.295501][ T8508] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.303916][ T8508] bridge0: port 1(bridge_slave_0) entered disabled state [ 1583.312192][ T8508] device bridge_slave_0 entered promiscuous mode [ 1583.321640][ T8508] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.328863][ T8508] bridge0: port 2(bridge_slave_1) entered disabled state [ 1583.336551][ T8508] device bridge_slave_1 entered promiscuous mode [ 1583.359353][ T8508] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1583.370215][ T8508] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1583.393202][ T8508] team0: Port device team_slave_0 added [ 1583.400716][ T8508] team0: Port device team_slave_1 added [ 1583.418743][ T8508] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1583.425685][ T8508] 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. [ 1583.451676][ T8508] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1583.464305][ T8508] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1583.472215][ T8508] 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. [ 1583.499354][ T8508] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1583.527219][ T8508] device hsr_slave_0 entered promiscuous mode [ 1583.533880][ T8508] device hsr_slave_1 entered promiscuous mode [ 1583.638685][ T8508] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1583.650143][ T8508] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1583.660975][ T8508] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1583.671611][ T8508] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1583.697963][ T8508] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.705369][ T8508] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1583.713353][ T8508] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.720538][ T8508] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1583.769980][ T8508] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1583.783925][ T8486] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1583.796089][ T8486] bridge0: port 1(bridge_slave_0) entered disabled state [ 1583.804688][ T8486] bridge0: port 2(bridge_slave_1) entered disabled state [ 1583.813889][ T8486] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1583.829127][ T8508] 8021q: adding VLAN 0 to HW filter on device team0 [ 1583.841483][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1583.849999][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.857347][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1583.880711][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1583.890827][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.897959][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1583.906134][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1583.916267][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1583.929147][ T3085] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1583.944294][ T8508] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1583.955598][ T8508] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1583.969425][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1583.978903][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1583.988282][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1584.005733][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1584.014688][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1584.028836][ T8508] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1584.049444][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1584.070736][ T8486] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1584.079094][ T8486] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1584.089075][ T8486] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1584.100702][ T8508] device veth0_vlan entered promiscuous mode [ 1584.112995][ T8508] device veth1_vlan entered promiscuous mode [ 1584.135386][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1584.144397][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1584.152883][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1584.163739][ T8508] device veth0_macvtap entered promiscuous mode [ 1584.174135][ T8508] device veth1_macvtap entered promiscuous mode [ 1584.193197][ T8508] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1584.202726][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1584.212001][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1584.224567][ T8508] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1584.232079][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1584.240773][ T8731] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1584.253997][ T8508] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1584.263234][ T8508] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1584.272066][ T8508] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1584.281384][ T8508] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1584.381133][ T26] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1584.389493][ T26] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1584.422562][ T8729] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1584.434898][ T8528] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1584.448203][ T8528] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1584.457256][ T8729] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1585.067631][ T17] Bluetooth: hci0: command 0x0409 tx timeout [ 1587.147262][ T8729] Bluetooth: hci0: command 0x041b tx timeout [ 1589.226986][ T8478] Bluetooth: hci0: command 0x040f tx timeout [ 1591.306710][ T8478] Bluetooth: hci0: command 0x0419 tx timeout [ 1706.516777][ T17] Bluetooth: hci0: command 0x0406 tx timeout [ 1743.466924][ T1643] INFO: task syz-executor.0:8853 blocked for more than 143 seconds. [ 1743.475063][ T1643] Not tainted 5.10.0-rc4-next-20201120-syzkaller #0 [ 1743.483795][ T1643] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1743.492928][ T1643] task:syz-executor.0 state:D stack:28848 pid: 8853 ppid: 8508 flags:0x00004002 [ 1743.502718][ T1643] Call Trace: [ 1743.506210][ T1643] __schedule+0x890/0x2030 [ 1743.511495][ T1643] ? io_schedule_timeout+0x140/0x140 [ 1743.517772][ T1643] ? lockdep_hardirqs_on+0x79/0x100 [ 1743.522967][ T1643] ? _raw_spin_unlock_irq+0x2a/0x40 [ 1743.529689][ T1643] schedule+0xcf/0x270 [ 1743.533814][ T1643] __io_uring_files_cancel+0xc4d/0x14b0 [ 1743.540256][ T1643] ? __io_uring_free+0x1d0/0x1d0 [ 1743.545250][ T1643] ? exit_sem+0x112/0x1e80 [ 1743.550788][ T1643] ? rwlock_bug.part.0+0x90/0x90 [ 1743.555788][ T1643] ? add_wait_queue+0x150/0x150 [ 1743.561346][ T1643] ? copy_semundo+0x2f0/0x2f0 [ 1743.566094][ T1643] exit_files+0xe4/0x170 [ 1743.570713][ T1643] do_exit+0xb61/0x29f0 [ 1743.574896][ T1643] ? find_held_lock+0x2d/0x110 [ 1743.579757][ T1643] ? mm_update_next_owner+0x7a0/0x7a0 [ 1743.585183][ T1643] ? get_signal+0x2f6/0x1f70 [ 1743.589910][ T1643] ? lock_downgrade+0x6d0/0x6d0 [ 1743.594785][ T1643] do_group_exit+0x125/0x310 [ 1743.599511][ T1643] get_signal+0x3ea/0x1f70 [ 1743.603977][ T1643] ? futex_exit_release+0x220/0x220 [ 1743.609371][ T1643] ? __might_fault+0xd3/0x180 [ 1743.614135][ T1643] arch_do_signal_or_restart+0x2a6/0x1ea0 [ 1743.619976][ T1643] ? _copy_to_user+0xdc/0x150 [ 1743.624681][ T1643] ? copy_siginfo_to_user32+0xa0/0xa0 [ 1743.630272][ T1643] ? __do_sys_futex+0x2a2/0x470 [ 1743.635132][ T1643] ? do_futex+0x1a60/0x1a60 [ 1743.639778][ T1643] exit_to_user_mode_prepare+0x124/0x200 [ 1743.645432][ T1643] syscall_exit_to_user_mode+0x38/0x260 [ 1743.651166][ T1643] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1743.657132][ T1643] RIP: 0033:0x45deb9 [ 1743.661299][ T1643] Code: Unable to access opcode bytes at RIP 0x45de8f. [ 1743.668292][ T1643] RSP: 002b:00007f64085e6cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 1743.676801][ T1643] RAX: fffffffffffffe00 RBX: 000000000118bf28 RCX: 000000000045deb9 [ 1743.684778][ T1643] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000118bf28 [ 1743.692874][ T1643] RBP: 000000000118bf20 R08: 0000000000000000 R09: 0000000000000000 [ 1743.700941][ T1643] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c [ 1743.709047][ T1643] R13: 00007fffe17f6c9f R14: 00007f64085e79c0 R15: 000000000118bf2c [ 1743.717179][ T1643] [ 1743.717179][ T1643] Showing all locks held in the system: [ 1743.724908][ T1643] 1 lock held by khungtaskd/1643: [ 1743.730078][ T1643] #0: ffffffff8b339ca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1743.740098][ T1643] [ 1743.742442][ T1643] ============================================= [ 1743.742442][ T1643] [ 1743.750944][ T1643] NMI backtrace for cpu 1 [ 1743.755277][ T1643] CPU: 1 PID: 1643 Comm: khungtaskd Not tainted 5.10.0-rc4-next-20201120-syzkaller #0 [ 1743.764804][ T1643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1743.774841][ T1643] Call Trace: [ 1743.778158][ T1643] dump_stack+0x107/0x163 [ 1743.782475][ T1643] nmi_cpu_backtrace.cold+0x44/0xd7 [ 1743.787745][ T1643] ? lapic_can_unplug_cpu+0x80/0x80 [ 1743.792971][ T1643] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 1743.798978][ T1643] watchdog+0xd89/0xf30 [ 1743.803134][ T1643] ? trace_sched_process_hang+0x280/0x280 [ 1743.808902][ T1643] kthread+0x3af/0x4a0 [ 1743.812954][ T1643] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 1743.818845][ T1643] ret_from_fork+0x1f/0x30 [ 1743.823428][ T1643] Sending NMI from CPU 1 to CPUs 0: [ 1743.829419][ C0] NMI backtrace for cpu 0 [ 1743.829427][ C0] CPU: 0 PID: 4884 Comm: systemd-journal Not tainted 5.10.0-rc4-next-20201120-syzkaller #0 [ 1743.829435][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1743.829439][ C0] RIP: 0010:mark_lock+0x105/0x24c0 [ 1743.829452][ C0] Code: 0f b7 ed be 08 00 00 00 4c 89 e8 48 c1 f8 06 48 8d 3c c5 60 07 bc 8e e8 89 d5 5c 00 4c 0f a3 2d b1 04 66 0d 0f 83 10 01 00 00 <4f> 8d 6c 6d 00 49 c1 e5 06 49 81 c5 80 0b bc 8e 49 8d 7d 50 48 b8 [ 1743.829457][ C0] RSP: 0018:ffffc9000159fa20 EFLAGS: 00000047 [ 1743.829468][ C0] RAX: 0000000000000001 RBX: 1ffff920002b3f4b RCX: ffffffff815602a7 [ 1743.829475][ C0] RDX: fffffbfff1d780f0 RSI: 0000000000000008 RDI: ffffffff8ebc0778 [ 1743.829481][ C0] RBP: ffff8880113158a8 R08: 0000000000000000 R09: ffffffff8ebc077f [ 1743.829487][ C0] R10: fffffbfff1d780ef R11: 0000000000000000 R12: 0000000000000003 [ 1743.829493][ C0] R13: 00000000000000f8 R14: 0000000000000008 R15: 0000000000000000 [ 1743.829500][ C0] FS: 00007f348d6ce8c0(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 1743.829505][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1743.829511][ C0] CR2: 00007f348aab6000 CR3: 0000000025e08000 CR4: 00000000001506f0 [ 1743.829517][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1743.829523][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1743.829527][ C0] Call Trace: [ 1743.829532][ C0] ? unwind_get_return_address+0x51/0x90 [ 1743.829536][ C0] ? create_prof_cpu_mask+0x20/0x20 [ 1743.829541][ C0] ? arch_stack_walk+0x93/0xe0 [ 1743.829545][ C0] ? lock_chain_count+0x20/0x20 [ 1743.829549][ C0] ? stack_trace_save+0x8c/0xc0 [ 1743.829554][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 1743.829559][ C0] __lock_acquire+0x1216/0x5c00 [ 1743.829564][ C0] ? security_prepare_creds+0x104/0x180 [ 1743.829568][ C0] ? prepare_creds+0x509/0x730 [ 1743.829573][ C0] ? do_faccessat+0x3d7/0x820 [ 1743.829577][ C0] ? do_syscall_64+0x2d/0x70 [ 1743.829582][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 1743.829587][ C0] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 1743.829591][ C0] lock_acquire+0x2a3/0x8c0 [ 1743.829596][ C0] ? __might_fault+0xa3/0x180 [ 1743.829600][ C0] ? lock_release+0x710/0x710 [ 1743.829605][ C0] __might_fault+0x106/0x180 [ 1743.829609][ C0] ? __might_fault+0xa3/0x180 [ 1743.829613][ C0] strncpy_from_user+0x2f/0x3e0 [ 1743.829617][ C0] getname_flags.part.0+0x95/0x4f0 [ 1743.829623][ C0] ? security_prepare_creds+0xe2/0x180 [ 1743.829627][ C0] user_path_at_empty+0xa1/0x100 [ 1743.829632][ C0] do_faccessat+0x129/0x820 [ 1743.829636][ C0] ? stream_open+0x60/0x60 [ 1743.829641][ C0] ? __secure_computing+0x104/0x360 [ 1743.829645][ C0] do_syscall_64+0x2d/0x70 [ 1743.829650][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1743.829654][ C0] RIP: 0033:0x7f348c98a9c7 [ 1743.829667][ C0] Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 [ 1743.829672][ C0] RSP: 002b:00007ffd64acc208 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 [ 1743.829683][ C0] RAX: ffffffffffffffda RBX: 00007ffd64acf120 RCX: 00007f348c98a9c7 [ 1743.829689][ C0] RDX: 00007f348d3fba00 RSI: 0000000000000000 RDI: 000055fa5b21e9a3 [ 1743.829695][ C0] RBP: 00007ffd64acc240 R08: 0000000000000000 R09: 0000000000000000 [ 1743.829701][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 [ 1743.829708][ C0] R13: 0000000000000000 R14: 00007ffd64acf120 R15: 00007ffd64acc730 [ 1743.829865][ T1643] Kernel panic - not syncing: hung_task: blocked tasks [ 1744.182586][ T1643] CPU: 1 PID: 1643 Comm: khungtaskd Not tainted 5.10.0-rc4-next-20201120-syzkaller #0 [ 1744.192123][ T1643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1744.202155][ T1643] Call Trace: [ 1744.205430][ T1643] dump_stack+0x107/0x163 [ 1744.209768][ T1643] panic+0x306/0x73d [ 1744.213646][ T1643] ? __warn_printk+0xf3/0xf3 [ 1744.218223][ T1643] ? lapic_can_unplug_cpu+0x80/0x80 [ 1744.223400][ T1643] ? preempt_schedule_thunk+0x16/0x18 [ 1744.228771][ T1643] ? watchdog.cold+0x22d/0x248 [ 1744.233514][ T1643] ? watchdog+0xc59/0xf30 [ 1744.237839][ T1643] watchdog.cold+0x23e/0x248 [ 1744.242438][ T1643] ? trace_sched_process_hang+0x280/0x280 [ 1744.248143][ T1643] kthread+0x3af/0x4a0 [ 1744.252193][ T1643] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 1744.258080][ T1643] ret_from_fork+0x1f/0x30 [ 1744.263160][ T1643] Kernel Offset: disabled [ 1744.267486][ T1643] Rebooting in 86400 seconds..