[ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.145' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 616.314932][ T1171] INFO: task syz-executor231:6911 blocked for more than 143 seconds. [ 616.323194][ T1171] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.330665][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.339423][ T1171] task:syz-executor231 state:D stack:28104 pid: 6911 ppid: 6905 flags:0x00004000 [ 616.348682][ T1171] Call Trace: [ 616.352049][ T1171] __schedule+0xea9/0x2230 [ 616.356549][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.361856][ T1171] ? lockdep_hardirqs_on+0x53/0x100 [ 616.367121][ T1171] schedule+0xd0/0x2a0 [ 616.371212][ T1171] schedule_timeout+0x1d8/0x250 [ 616.376133][ T1171] ? usleep_range+0x170/0x170 [ 616.380842][ T1171] ? lock_downgrade+0x830/0x830 [ 616.385743][ T1171] ? do_raw_spin_lock+0x120/0x2b0 [ 616.390782][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.396073][ T1171] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 616.402052][ T1171] ? _raw_spin_unlock_irq+0x1f/0x80 [ 616.407309][ T1171] wait_for_completion+0x163/0x260 [ 616.412429][ T1171] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 616.419009][ T1171] ? apparmor_capable+0x1d8/0x460 [ 616.424056][ T1171] ? security_capable+0x8f/0xc0 [ 616.428998][ T1171] io_uring_setup+0x1495/0x29a0 [ 616.433875][ T1171] ? io_sq_thread+0xe00/0xe00 [ 616.438630][ T1171] ? io_issue_sqe+0x5bb0/0x5bb0 [ 616.443479][ T1171] ? io_wake_function+0x2e0/0x2e0 [ 616.448597][ T1171] ? check_preemption_disabled+0x50/0x130 [ 616.454317][ T1171] ? syscall_enter_from_user_mode+0x20/0x290 [ 616.460382][ T1171] ? lockdep_hardirqs_on+0x53/0x100 [ 616.465720][ T1171] do_syscall_64+0x2d/0x70 [ 616.470126][ T1171] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.476159][ T1171] RIP: 0033:0x440229 [ 616.480048][ T1171] Code: Bad RIP value. [ 616.484102][ T1171] RSP: 002b:00007ffe1b4bed98 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 616.492579][ T1171] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 [ 616.500672][ T1171] RDX: 0000000000400ad0 RSI: 0000000020000400 RDI: 00000000000032f8 [ 616.508751][ T1171] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 616.516839][ T1171] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401a30 [ 616.524899][ T1171] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 616.532920][ T1171] INFO: task io_uring-sq:6912 blocked for more than 143 seconds. [ 616.540763][ T1171] Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.547871][ T1171] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 616.556692][ T1171] task:io_uring-sq state:D stack:31200 pid: 6912 ppid: 2 flags:0x00004000 [ 616.565979][ T1171] Call Trace: [ 616.569275][ T1171] __schedule+0xea9/0x2230 [ 616.573682][ T1171] ? io_schedule_timeout+0x140/0x140 [ 616.579061][ T1171] ? _raw_spin_unlock_irqrestore+0x6f/0x90 [ 616.584944][ T1171] schedule+0xd0/0x2a0 [ 616.589009][ T1171] ? __do_sys_io_uring_enter+0x1940/0x1940 [ 616.594928][ T1171] schedule_preempt_disabled+0xf/0x20 [ 616.600339][ T1171] kthread+0x2ac/0x4a0 [ 616.604388][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.609569][ T1171] ret_from_fork+0x1f/0x30 [ 616.614001][ T1171] [ 616.614001][ T1171] Showing all locks held in the system: [ 616.622726][ T1171] 1 lock held by khungtaskd/1171: [ 616.627806][ T1171] #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 616.637828][ T1171] 1 lock held by in:imklog/6588: [ 616.642763][ T1171] #0: ffff888096b1b8f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 616.651977][ T1171] [ 616.654335][ T1171] ============================================= [ 616.654335][ T1171] [ 616.662967][ T1171] NMI backtrace for cpu 1 [ 616.668211][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.678053][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.688104][ T1171] Call Trace: [ 616.691440][ T1171] dump_stack+0x198/0x1fd [ 616.695760][ T1171] nmi_cpu_backtrace.cold+0x44/0xd7 [ 616.702516][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 616.708233][ T1171] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 616.714195][ T1171] watchdog+0xd89/0xf30 [ 616.718347][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 616.724070][ T1171] kthread+0x3b5/0x4a0 [ 616.728132][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 616.733238][ T1171] ret_from_fork+0x1f/0x30 [ 616.737816][ T1171] Sending NMI from CPU 1 to CPUs 0: [ 616.743976][ C0] NMI backtrace for cpu 0 [ 616.743984][ C0] CPU: 0 PID: 3911 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 616.743991][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 616.743995][ C0] RIP: 0010:__orc_find+0x6/0xf0 [ 616.744007][ C0] Code: be e8 1e d9 81 00 48 c7 c7 20 c9 48 88 e8 42 04 83 02 cc cc 48 8b 07 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 89 d0 41 56 <41> 55 41 54 4c 8d 64 87 fc 55 53 48 83 ec 10 85 d2 0f 84 95 00 00 [ 616.744011][ C0] RSP: 0018:ffffc9000134f750 EFLAGS: 00000002 [ 616.744021][ C0] RAX: 0000000000000010 RBX: 1ffff92000269ef5 RCX: ffffffff81c45ddf [ 616.744027][ C0] RDX: 0000000000000010 RSI: ffffffff8b32fc0a RDI: ffffffff8ad1b980 [ 616.744033][ C0] RBP: 0000000000000001 R08: ffffffff8b32fc6a R09: ffffffff8b32fc0a [ 616.744038][ C0] R10: 000000000007201e R11: 000000000002d3f3 R12: ffffc9000134f888 [ 616.744044][ C0] R13: ffffc9000134f875 R14: ffffc9000134f890 R15: ffffc9000134f840 [ 616.744050][ C0] FS: 00007fa9e950b8c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 616.744055][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 616.744061][ C0] CR2: 00007fa9e68ae000 CR3: 00000000932c1000 CR4: 00000000001506f0 [ 616.744067][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 616.744072][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 616.744076][ C0] Call Trace: [ 616.744086][ C0] unwind_next_frame+0x342/0x1f90 [ 616.744091][ C0] ? do_mkdirat+0xa0/0x2d0 [ 616.744095][ C0] ? mark_lock+0xbc/0x1710 [ 616.744099][ C0] ? deref_stack_reg+0x150/0x150 [ 616.744103][ C0] ? __unwind_start+0x517/0x800 [ 616.744107][ C0] ? profile_setup.cold+0xc1/0xc1 [ 616.744111][ C0] arch_stack_walk+0x81/0xf0 [ 616.744115][ C0] ? do_mkdirat+0xa0/0x2d0 [ 616.744119][ C0] ? putname+0xe1/0x120 [ 616.744123][ C0] stack_trace_save+0x8c/0xc0 [ 616.744128][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 616.744132][ C0] kasan_save_stack+0x1b/0x40 [ 616.744136][ C0] ? kasan_save_stack+0x1b/0x40 [ 616.744141][ C0] ? kasan_set_track+0x1c/0x30 [ 616.744146][ C0] ? kasan_set_free_info+0x1b/0x30 [ 616.744150][ C0] ? __kasan_slab_free+0xd8/0x120 [ 616.744155][ C0] ? kmem_cache_free.part.0+0x74/0x1e0 [ 616.744159][ C0] ? putname+0xe1/0x120 [ 616.744164][ C0] ? filename_parentat+0x4b1/0x560 [ 616.744168][ C0] ? filename_create+0x9e/0x490 [ 616.744172][ C0] ? do_mkdirat+0xa0/0x2d0 [ 616.744177][ C0] ? lock_is_held_type+0xbb/0xf0 [ 616.744181][ C0] ? find_held_lock+0x2d/0x110 [ 616.744186][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 616.744191][ C0] ? lock_downgrade+0x830/0x830 [ 616.744195][ C0] ? terminate_walk+0x394/0x570 [ 616.744200][ C0] ? do_raw_spin_unlock+0x171/0x230 [ 616.744205][ C0] ? _raw_spin_unlock_irqrestore+0x5c/0x90 [ 616.744210][ C0] ? debug_check_no_obj_freed+0x20c/0x41c [ 616.744214][ C0] kasan_set_track+0x1c/0x30 [ 616.744219][ C0] kasan_set_free_info+0x1b/0x30 [ 616.744223][ C0] __kasan_slab_free+0xd8/0x120 [ 616.744227][ C0] ? putname+0xe1/0x120 [ 616.744232][ C0] kmem_cache_free.part.0+0x74/0x1e0 [ 616.744236][ C0] putname+0xe1/0x120 [ 616.744241][ C0] filename_parentat+0x4b1/0x560 [ 616.744245][ C0] ? getname+0xd0/0xd0 [ 616.744249][ C0] ? find_held_lock+0x2d/0x110 [ 616.744253][ C0] ? __might_fault+0x11f/0x1d0 [ 616.744258][ C0] ? __virt_addr_valid+0x1fe/0x2b0 [ 616.744262][ C0] ? __phys_addr+0x9a/0x110 [ 616.744267][ C0] ? __phys_addr_symbol+0x2c/0x70 [ 616.744271][ C0] filename_create+0x9e/0x490 [ 616.744276][ C0] ? strncpy_from_user+0x2bf/0x3e0 [ 616.744280][ C0] ? filename_parentat+0x560/0x560 [ 616.744285][ C0] ? getname_flags.part.0+0x1dd/0x4f0 [ 616.744289][ C0] do_mkdirat+0xa0/0x2d0 [ 616.744294][ C0] ? user_path_create+0xf0/0xf0 [ 616.744298][ C0] ? __secure_computing+0x104/0x360 [ 616.744303][ C0] do_syscall_64+0x2d/0x70 [ 616.744308][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 616.744312][ C0] RIP: 0033:0x7fa9e87c7687 [ 616.744324][ C0] Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 [ 616.744329][ C0] RSP: 002b:00007ffd9d274568 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 [ 616.744340][ C0] RAX: ffffffffffffffda RBX: 00007ffd9d2775d0 RCX: 00007fa9e87c7687 [ 616.744346][ C0] RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000556bba1658a0 [ 616.744352][ C0] RBP: 00007ffd9d2745a0 R08: 0000556bb9bbf3e5 R09: 0000000000000018 [ 616.744358][ C0] R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 [ 616.744364][ C0] R13: 0000000000000001 R14: 0000556bba1658a0 R15: 00007ffd9d274be0 [ 616.744423][ T1171] Kernel panic - not syncing: hung_task: blocked tasks [ 617.209857][ T1171] CPU: 1 PID: 1171 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 [ 617.220165][ T1171] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 617.230212][ T1171] Call Trace: [ 617.233492][ T1171] dump_stack+0x198/0x1fd [ 617.237809][ T1171] panic+0x347/0x7c0 [ 617.241742][ T1171] ? __warn_printk+0xf3/0xf3 [ 617.246333][ T1171] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 617.251964][ T1171] ? preempt_schedule_thunk+0x16/0x18 [ 617.257331][ T1171] ? watchdog.cold+0x22d/0x24b [ 617.262076][ T1171] ? watchdog+0xc59/0xf30 [ 617.268405][ T1171] watchdog.cold+0x23e/0x24b [ 617.272996][ T1171] ? trace_sched_process_hang+0x2e0/0x2e0 [ 617.278716][ T1171] kthread+0x3b5/0x4a0 [ 617.282766][ T1171] ? __kthread_bind_mask+0xc0/0xc0 [ 617.287862][ T1171] ret_from_fork+0x1f/0x30 [ 617.293736][ T1171] Kernel Offset: disabled [ 617.298070][ T1171] Rebooting in 86400 seconds..