[ 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 '10.128.0.60' (ECDSA) to the list of known hosts. 2020/07/31 22:38:32 parsed 1 programs 2020/07/31 22:38:33 executed programs: 0 syzkaller login: [ 1050.545753][ T6876] IPVS: ftp: loaded support on port[0] = 21 [ 1050.646777][ T6876] chnl_net:caif_netlink_parms(): no params data found [ 1050.694496][ T6876] bridge0: port 1(bridge_slave_0) entered blocking state [ 1050.702527][ T6876] bridge0: port 1(bridge_slave_0) entered disabled state [ 1050.711505][ T6876] device bridge_slave_0 entered promiscuous mode [ 1050.719399][ T6876] bridge0: port 2(bridge_slave_1) entered blocking state [ 1050.727148][ T6876] bridge0: port 2(bridge_slave_1) entered disabled state [ 1050.735098][ T6876] device bridge_slave_1 entered promiscuous mode [ 1050.754080][ T6876] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1050.764661][ T6876] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1050.785166][ T6876] team0: Port device team_slave_0 added [ 1050.792304][ T6876] team0: Port device team_slave_1 added [ 1050.808759][ T6876] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1050.815791][ T6876] 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. [ 1050.843015][ T6876] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1050.855446][ T6876] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1050.862818][ T6876] 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. [ 1050.889074][ T6876] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1050.962402][ T6876] device hsr_slave_0 entered promiscuous mode [ 1051.000445][ T6876] device hsr_slave_1 entered promiscuous mode [ 1051.141077][ T6876] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1051.171984][ T6876] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1051.201766][ T6876] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1051.262493][ T6876] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1051.314348][ T6876] bridge0: port 2(bridge_slave_1) entered blocking state [ 1051.321500][ T6876] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1051.328984][ T6876] bridge0: port 1(bridge_slave_0) entered blocking state [ 1051.336100][ T6876] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1051.376980][ T6876] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1051.389336][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1051.399121][ T6845] bridge0: port 1(bridge_slave_0) entered disabled state [ 1051.407565][ T6845] bridge0: port 2(bridge_slave_1) entered disabled state [ 1051.416084][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1051.427935][ T6876] 8021q: adding VLAN 0 to HW filter on device team0 [ 1051.438357][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1051.447518][ T3031] bridge0: port 1(bridge_slave_0) entered blocking state [ 1051.454619][ T3031] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1051.471067][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1051.479361][ T6845] bridge0: port 2(bridge_slave_1) entered blocking state [ 1051.486447][ T6845] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1051.509176][ T6876] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1051.519968][ T6876] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1051.532662][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1051.541766][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1051.550725][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1051.559708][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1051.568190][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1051.575936][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1051.595437][ T6876] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1051.602608][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1051.611162][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1051.631223][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1051.651918][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1051.661205][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1051.670598][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1051.678203][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1051.688109][ T6876] device veth0_vlan entered promiscuous mode [ 1051.699229][ T6876] device veth1_vlan entered promiscuous mode [ 1051.718612][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1051.726975][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1051.735870][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1051.744592][ T6845] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1051.755038][ T6876] device veth0_macvtap entered promiscuous mode [ 1051.764858][ T6876] device veth1_macvtap entered promiscuous mode [ 1051.781430][ T6876] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1051.788720][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1051.797795][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1051.806021][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1051.814589][ T3031] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1051.825803][ T6876] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1051.833795][ T6853] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1051.842897][ T6853] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1051.854629][ T6876] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1051.863806][ T6876] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1051.875017][ T6876] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1051.885444][ T6876] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1055.170381][ T6845] Bluetooth: hci0: command 0x0409 tx timeout 2020/07/31 22:38:38 executed programs: 57 [ 1057.249555][ T6845] Bluetooth: hci0: command 0x041b tx timeout [ 1059.328868][ T6853] Bluetooth: hci0: command 0x040f tx timeout [ 1061.408591][ T3031] Bluetooth: hci0: command 0x0419 tx timeout [ 1081.488184][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 1142.920326][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 1163.398265][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 1178.915191][ T3031] Bluetooth: hci0: command 0x0406 tx timeout [ 1204.353982][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #08!!! [ 1210.112203][ T1166] INFO: task syz-executor.0:7667 can't die for more than 143 seconds. [ 1210.120469][ T1166] syz-executor.0 D28360 7667 6876 0x00000004 [ 1210.135779][ T1166] Call Trace: [ 1210.139219][ T1166] __schedule+0x8e5/0x21e0 [ 1210.145458][ T1166] ? io_schedule_timeout+0x140/0x140 [ 1210.150746][ T1166] schedule+0xd0/0x2a0 [ 1210.157043][ T1166] schedule_preempt_disabled+0xf/0x20 [ 1210.163164][ T1166] __mutex_lock+0x3e2/0x10e0 [ 1210.167829][ T1166] ? pipe_release+0x49/0x320 [ 1210.174548][ T1166] ? mutex_lock_io_nested+0xf60/0xf60 [ 1210.179980][ T1166] ? fcntl_setlk+0xf60/0xf60 [ 1210.185691][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 1210.190632][ T1166] pipe_release+0x49/0x320 [ 1210.197186][ T1166] __fput+0x285/0x920 [ 1210.201165][ T1166] ? free_pipe_info+0x390/0x390 [ 1210.207187][ T1166] task_work_run+0xdd/0x190 [ 1210.211744][ T1166] exit_to_user_mode_prepare+0x195/0x1c0 [ 1210.220135][ T1166] syscall_exit_to_user_mode+0x59/0x2b0 [ 1210.226356][ T1166] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1210.233838][ T1166] RIP: 0033:0x416791 [ 1210.237719][ T1166] Code: Bad RIP value. [ 1210.241770][ T1166] RSP: 002b:00007ffd7aff1510 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 1210.251571][ T1166] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000416791 [ 1210.260979][ T1166] RDX: 0000000000000000 RSI: 00000000007904d0 RDI: 0000000000000006 [ 1210.269685][ T1166] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 1210.280119][ T1166] R10: 00007ffd7aff1600 R11: 0000000000000293 R12: 00000000007905a8 [ 1210.288773][ T1166] R13: 000000000010297d R14: ffffffffffffffff R15: 000000000078bfac [ 1210.298490][ T1166] INFO: task syz-executor.0:7667 blocked for more than 143 seconds. [ 1210.307123][ T1166] Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 1210.315687][ T1166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1210.324961][ T1166] syz-executor.0 D28360 7667 6876 0x00000004 [ 1210.331298][ T1166] Call Trace: [ 1210.336698][ T1166] __schedule+0x8e5/0x21e0 [ 1210.341121][ T1166] ? io_schedule_timeout+0x140/0x140 [ 1210.347509][ T1166] schedule+0xd0/0x2a0 [ 1210.351586][ T1166] schedule_preempt_disabled+0xf/0x20 [ 1210.359113][ T1166] __mutex_lock+0x3e2/0x10e0 [ 1210.364437][ T1166] ? pipe_release+0x49/0x320 [ 1210.369035][ T1166] ? mutex_lock_io_nested+0xf60/0xf60 [ 1210.377546][ T1166] ? fcntl_setlk+0xf60/0xf60 [ 1210.382917][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 1210.387943][ T1166] pipe_release+0x49/0x320 [ 1210.394238][ T1166] __fput+0x285/0x920 [ 1210.398218][ T1166] ? free_pipe_info+0x390/0x390 [ 1210.404688][ T1166] task_work_run+0xdd/0x190 [ 1210.409196][ T1166] exit_to_user_mode_prepare+0x195/0x1c0 [ 1210.416704][ T1166] syscall_exit_to_user_mode+0x59/0x2b0 [ 1210.422862][ T1166] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1210.428765][ T1166] RIP: 0033:0x416791 [ 1210.434872][ T1166] Code: Bad RIP value. [ 1210.438937][ T1166] RSP: 002b:00007ffd7aff1510 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 1210.448727][ T1166] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000416791 [ 1210.458424][ T1166] RDX: 0000000000000000 RSI: 00000000007904d0 RDI: 0000000000000006 [ 1210.467107][ T1166] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 1210.476728][ T1166] R10: 00007ffd7aff1600 R11: 0000000000000293 R12: 00000000007905a8 [ 1210.485351][ T1166] R13: 000000000010297d R14: ffffffffffffffff R15: 000000000078bfac [ 1210.494873][ T1166] INFO: task syz-executor.0:7670 can't die for more than 143 seconds. [ 1210.503717][ T1166] syz-executor.0 R running task 28640 7670 6876 0x00004006 [ 1210.511635][ T1166] Call Trace: [ 1210.517720][ T1166] ? __schedule+0x8ed/0x21e0 [ 1210.522997][ T1166] ? mark_lock+0xbc/0x1710 [ 1210.527448][ T1166] ? kvm_sched_clock_read+0x14/0x40 [ 1210.535542][ T1166] ? mark_held_locks+0x9f/0xe0 [ 1210.540308][ T1166] ? lockdep_hardirqs_off+0x7e/0xb0 [ 1210.546515][ T1166] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 1210.554224][ T1166] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 1210.560301][ T1166] ? trace_hardirqs_on+0x5f/0x220 [ 1210.566353][ T1166] ? trace_hardirqs_on+0x5f/0x220 [ 1210.571383][ T1166] ? lockdep_hardirqs_on+0x76/0xf0 [ 1210.578581][ T1166] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 1210.585459][ T1166] ? iov_iter_alignment+0x452/0x850 [ 1210.590751][ T1166] ? iov_iter_alignment+0x45b/0x850 [ 1210.598817][ T1166] ? iov_iter_alignment+0x452/0x850 [ 1210.604710][ T1166] ? ext4_file_write_iter+0x345/0x1390 [ 1210.610236][ T1166] ? aa_file_perm+0x5e2/0x1100 [ 1210.617074][ T1166] ? lock_acquire+0x1f1/0xad0 [ 1210.621764][ T1166] ? pipe_lock+0x5a/0x70 [ 1210.627039][ T1166] ? aa_path_link+0x2f0/0x2f0 [ 1210.631720][ T1166] ? ext4_buffered_write_iter+0x4a0/0x4a0 [ 1210.639573][ T1166] ? lock_release+0x8e0/0x8e0 [ 1210.644950][ T1166] ? lock_is_held_type+0xbb/0xf0 [ 1210.649935][ T1166] ? do_iter_readv_writev+0x567/0x780 [ 1210.657616][ T1166] ? new_sync_write+0x650/0x650 [ 1210.663823][ T1166] ? apparmor_file_permission+0x26e/0x4e0 [ 1210.669553][ T1166] ? do_iter_write+0x188/0x670 [ 1210.676492][ T1166] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 1210.682661][ T1166] ? trace_kmalloc+0xfd/0x130 [ 1210.687368][ T1166] ? iter_file_splice_write+0x170/0xbe0 [ 1210.694866][ T1166] ? vfs_iter_write+0x70/0xa0 [ 1210.699543][ T1166] ? iter_file_splice_write+0x721/0xbe0 [ 1210.706106][ T1166] ? __do_compat_sys_vmsplice+0x260/0x260 [ 1210.711823][ T1166] ? lock_release+0x8e0/0x8e0 [ 1210.718544][ T1166] ? __sb_start_write+0x1d5/0x470 [ 1210.724142][ T1166] ? __do_compat_sys_vmsplice+0x260/0x260 [ 1210.729857][ T1166] ? do_splice+0xbb8/0x17a0 [ 1210.736293][ T1166] ? splice_from_pipe+0x140/0x140 [ 1210.741326][ T1166] ? __x64_sys_splice+0x198/0x250 [ 1210.747458][ T1166] ? do_syscall_64+0x2d/0x70 [ 1210.753659][ T1166] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1210.759744][ T1166] [ 1210.759744][ T1166] Showing all locks held in the system: [ 1210.768507][ T1166] 1 lock held by khungtaskd/1166: [ 1210.775053][ T1166] #0: ffffffff89c52a80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 1210.785621][ T1166] 1 lock held by in:imklog/6548: [ 1210.790545][ T1166] #0: ffff8880a78ff6b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 1210.802790][ T1166] 1 lock held by syz-executor.0/7667: [ 1210.808159][ T1166] #0: ffff888095b17068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x49/0x320 [ 1210.819271][ T1166] 2 locks held by syz-executor.0/7670: [ 1210.825345][ T1166] [ 1210.827666][ T1166] ============================================= [ 1210.827666][ T1166] [ 1210.847121][ T1166] NMI backtrace for cpu 0 [ 1210.851463][ T1166] CPU: 0 PID: 1166 Comm: khungtaskd Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 1210.860899][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1210.870943][ T1166] Call Trace: [ 1210.874262][ T1166] dump_stack+0x18f/0x20d [ 1210.878610][ T1166] nmi_cpu_backtrace.cold+0x44/0xd7 [ 1210.883841][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1210.889465][ T1166] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 1210.895470][ T1166] watchdog+0xd89/0xf30 [ 1210.899612][ T1166] ? trace_sched_process_hang+0x2e0/0x2e0 [ 1210.905347][ T1166] kthread+0x3b5/0x4a0 [ 1210.909404][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1210.914504][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1210.919654][ T1166] ret_from_fork+0x1f/0x30 [ 1210.924275][ T1166] Sending NMI from CPU 0 to CPUs 1: [ 1210.929883][ C1] NMI backtrace for cpu 1 [ 1210.929890][ C1] CPU: 1 PID: 7670 Comm: syz-executor.0 Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 1210.929896][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1210.929901][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 [ 1210.929912][ C1] Code: 5d be 03 00 00 00 e9 a6 06 27 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 48 8b 14 25 c0 fe 01 00 <65> 8b 05 60 be 8d 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 [ 1210.929916][ C1] RSP: 0018:ffffc9000810f8c8 EFLAGS: 00000246 [ 1210.929923][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83996704 [ 1210.929929][ C1] RDX: ffff888099a02400 RSI: ffff888099a02400 RDI: 0000000000000005 [ 1210.929934][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff888098fb63c7 [ 1210.929939][ C1] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [ 1210.929943][ C1] R13: ffffc9000810fcd0 R14: dffffc0000000000 R15: ffff88808a07c800 [ 1210.929949][ C1] FS: 00007f1f60805700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 1210.929953][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1210.929958][ C1] CR2: 000055d76e4bd938 CR3: 00000000a8964000 CR4: 00000000001506e0 [ 1210.929963][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1210.929968][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1210.929971][ C1] Call Trace: [ 1210.929974][ C1] iov_iter_alignment+0x4c2/0x850 [ 1210.929978][ C1] ext4_file_write_iter+0x345/0x1390 [ 1210.929981][ C1] ? aa_file_perm+0x5e2/0x1100 [ 1210.929985][ C1] ? lock_acquire+0x1f1/0xad0 [ 1210.929988][ C1] ? pipe_lock+0x5a/0x70 [ 1210.929991][ C1] ? aa_path_link+0x2f0/0x2f0 [ 1210.929995][ C1] ? ext4_buffered_write_iter+0x4a0/0x4a0 [ 1210.929998][ C1] ? lock_release+0x8e0/0x8e0 [ 1210.930002][ C1] ? lock_is_held_type+0xbb/0xf0 [ 1210.930006][ C1] do_iter_readv_writev+0x567/0x780 [ 1210.930009][ C1] ? new_sync_write+0x650/0x650 [ 1210.930013][ C1] ? apparmor_file_permission+0x26e/0x4e0 [ 1210.930016][ C1] do_iter_write+0x188/0x670 [ 1210.930020][ C1] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 1210.930023][ C1] ? trace_kmalloc+0xfd/0x130 [ 1210.930027][ C1] ? iter_file_splice_write+0x170/0xbe0 [ 1210.930030][ C1] vfs_iter_write+0x70/0xa0 [ 1210.930034][ C1] iter_file_splice_write+0x721/0xbe0 [ 1210.930038][ C1] ? __do_compat_sys_vmsplice+0x260/0x260 [ 1210.930041][ C1] ? lock_release+0x8e0/0x8e0 [ 1210.930045][ C1] ? __sb_start_write+0x1d5/0x470 [ 1210.930048][ C1] ? __do_compat_sys_vmsplice+0x260/0x260 [ 1210.930051][ C1] do_splice+0xbb8/0x17a0 [ 1210.930055][ C1] ? splice_from_pipe+0x140/0x140 [ 1210.930058][ C1] __x64_sys_splice+0x198/0x250 [ 1210.930061][ C1] do_syscall_64+0x2d/0x70 [ 1210.930065][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1210.930068][ C1] RIP: 0033:0x45cc79 [ 1210.930079][ C1] Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 1210.930083][ C1] RSP: 002b:00007f1f60804c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 [ 1210.930091][ C1] RAX: ffffffffffffffda RBX: 0000000000032b80 RCX: 000000000045cc79 [ 1210.930096][ C1] RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000005 [ 1210.930101][ C1] RBP: 000000000078bff8 R08: 000000000000ffe0 R09: 0000000000000000 [ 1210.930106][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac [ 1210.930111][ C1] R13: 00007ffd7aff149f R14: 00007f1f608059c0 R15: 000000000078bfac [ 1210.942808][ T1166] Kernel panic - not syncing: hung_task: blocked tasks [ 1211.281811][ T1166] CPU: 0 PID: 1166 Comm: khungtaskd Not tainted 5.8.0-rc7-next-20200731-syzkaller #0 [ 1211.291338][ T1166] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1211.301397][ T1166] Call Trace: [ 1211.304678][ T1166] dump_stack+0x18f/0x20d [ 1211.309055][ T1166] panic+0x2e3/0x75c [ 1211.312944][ T1166] ? __warn_printk+0xf3/0xf3 [ 1211.317526][ T1166] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 1211.323145][ T1166] ? preempt_schedule_thunk+0x16/0x18 [ 1211.328508][ T1166] ? watchdog.cold+0x22d/0x24b [ 1211.333266][ T1166] ? watchdog+0xc59/0xf30 [ 1211.337589][ T1166] watchdog.cold+0x23e/0x24b [ 1211.342175][ T1166] ? trace_sched_process_hang+0x2e0/0x2e0 [ 1211.347885][ T1166] kthread+0x3b5/0x4a0 [ 1211.351942][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1211.357041][ T1166] ? __kthread_bind_mask+0xc0/0xc0 [ 1211.362143][ T1166] ret_from_fork+0x1f/0x30 [ 1211.367822][ T1166] Kernel Offset: disabled [ 1211.372139][ T1166] Rebooting in 86400 seconds..