Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 636.920958][ T1154] INFO: task syz-executor095:6850 blocked for more than 143 seconds. [ 636.929963][ T1154] Not tainted 5.9.0-rc2-syzkaller #0 [ 636.938526][ T1154] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.947733][ T1154] task:syz-executor095 state:D stack:26864 pid: 6850 ppid: 6844 flags:0x00000000 [ 636.957293][ T1154] Call Trace: [ 636.963201][ T1154] __schedule+0x8e5/0x21e0 [ 636.968020][ T1154] ? io_schedule_timeout+0x140/0x140 [ 636.973590][ T1154] schedule+0xd0/0x2a0 [ 636.977995][ T1154] schedule_timeout+0x1d8/0x250 [ 636.983037][ T1154] ? usleep_range+0x170/0x170 [ 636.987843][ T1154] ? lock_downgrade+0x830/0x830 [ 636.994679][ T1154] ? do_raw_spin_lock+0x120/0x2b0 [ 637.000070][ T1154] ? _raw_spin_unlock_irq+0x1f/0x80 [ 637.005384][ T1154] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 637.011638][ T1154] ? trace_hardirqs_on+0x5f/0x220 [ 637.016765][ T1154] wait_for_completion_timeout+0x15e/0x270 [ 637.022651][ T1154] ? wait_for_completion_io+0x260/0x260 [ 637.028285][ T1154] ? usb_submit_urb+0xb56/0x1320 [ 637.033393][ T1154] ? lockdep_init_map_waits+0x1b3/0x8a0 [ 637.038957][ T1154] usb_start_wait_urb+0x144/0x2b0 [ 637.044274][ T1154] ? usb_api_blocking_completion+0xa0/0xa0 [ 637.050273][ T1154] ? memset+0x20/0x40 [ 637.054368][ T1154] usb_bulk_msg+0x226/0x550 [ 637.058944][ T1154] do_proc_bulk+0x39b/0x710 [ 637.063516][ T1154] ? do_proc_control+0x930/0x930 [ 637.068787][ T1154] ? __might_fault+0x190/0x1d0 [ 637.073672][ T1154] usbdev_ioctl+0x586/0x3360 [ 637.079868][ T1154] ? processcompl_compat+0x670/0x670 [ 637.085350][ T1154] ? __schedule+0x88e/0x21e0 [ 637.090102][ T1154] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 637.097069][ T1154] ? do_vfs_ioctl+0x27d/0x1090 [ 637.101902][ T1154] ? generic_block_fiemap+0x60/0x60 [ 637.107217][ T1154] ? __schedule+0x8ed/0x21e0 [ 637.111891][ T1154] ? io_schedule_timeout+0x140/0x140 [ 637.117257][ T1154] ? bpf_lsm_file_ioctl+0x5/0x10 [ 637.122781][ T1154] ? processcompl_compat+0x670/0x670 [ 637.128096][ T1154] __x64_sys_ioctl+0x193/0x200 [ 637.133237][ T1154] do_syscall_64+0x2d/0x70 [ 637.138463][ T1154] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.144762][ T1154] RIP: 0033:0x443f89 [ 637.148656][ T1154] Code: Bad RIP value. [ 637.152979][ T1154] RSP: 002b:00007ffc27b87c88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 637.161950][ T1154] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443f89 [ 637.171006][ T1154] RDX: 0000000020000000 RSI: 00000000c0185502 RDI: 0000000000000003 [ 637.179178][ T1154] RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 [ 637.188019][ T1154] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000401c10 [ 637.196098][ T1154] R13: 0000000000401ca0 R14: 0000000000000000 R15: 0000000000000000 [ 637.204241][ T1154] [ 637.204241][ T1154] Showing all locks held in the system: [ 637.212524][ T1154] 1 lock held by khungtaskd/1154: [ 637.217625][ T1154] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.228435][ T1154] 1 lock held by in:imklog/6532: [ 637.233557][ T1154] [ 637.235918][ T1154] ============================================= [ 637.235918][ T1154] [ 637.244514][ T1154] NMI backtrace for cpu 1 [ 637.250020][ T1154] CPU: 1 PID: 1154 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.258338][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.269159][ T1154] Call Trace: [ 637.272780][ T1154] dump_stack+0x18f/0x20d [ 637.277148][ T1154] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.282383][ T1154] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.287998][ T1154] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.294240][ T1154] watchdog+0xd7d/0x1000 [ 637.298481][ T1154] ? reset_hung_task_detector+0x30/0x30 [ 637.304991][ T1154] kthread+0x3b5/0x4a0 [ 637.309070][ T1154] ? __kthread_bind_mask+0xc0/0xc0 [ 637.314353][ T1154] ? __kthread_bind_mask+0xc0/0xc0 [ 637.319478][ T1154] ret_from_fork+0x1f/0x30 [ 637.324010][ T1154] Sending NMI from CPU 1 to CPUs 0: [ 637.330413][ C0] NMI backtrace for cpu 0 [ 637.330420][ C0] CPU: 0 PID: 3894 Comm: systemd-journal Not tainted 5.9.0-rc2-syzkaller #0 [ 637.330427][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.330431][ C0] RIP: 0010:preempt_count_add+0x4a/0x140 [ 637.330443][ C0] Code: c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 e1 00 00 00 8b 15 98 49 47 0b 65 01 1d b1 36 b2 7e 85 d2 75 11 65 8b 05 a6 36 b2 7e <0f> b6 c0 3d f4 00 00 00 7f 64 65 8b 05 95 36 b2 7e 25 ff ff ff 7f [ 637.330447][ C0] RSP: 0018:ffffc900016375b0 EFLAGS: 00000246 [ 637.330456][ C0] RAX: 0000000080000001 RBX: 0000000000000001 RCX: 1ffffffff192e22c [ 637.330461][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 [ 637.330466][ C0] RBP: 0000000000000001 R08: ffffffff8b2798f0 R09: 0000000000000001 [ 637.330472][ C0] R10: 000000000007201e R11: 0000000000000001 R12: ffffc900016376e8 [ 637.330477][ C0] R13: 0000000000000000 R14: ffff8880931c41c0 R15: ffffc900016376a0 [ 637.330483][ C0] FS: 00007f51beec98c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 637.330488][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.330493][ C0] CR2: 00007f51bc267010 CR3: 000000009325b000 CR4: 00000000001506f0 [ 637.330499][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.330504][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.330507][ C0] Call Trace: [ 637.330511][ C0] unwind_next_frame+0x11f/0x1f90 [ 637.330515][ C0] ? do_syscall_64+0x2d/0x70 [ 637.330519][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.330523][ C0] ? deref_stack_reg+0x150/0x150 [ 637.330527][ C0] ? __unwind_start+0x517/0x800 [ 637.330531][ C0] ? profile_setup.cold+0xc1/0xc1 [ 637.330535][ C0] arch_stack_walk+0x81/0xf0 [ 637.330538][ C0] ? do_syscall_64+0x2d/0x70 [ 637.330542][ C0] stack_trace_save+0x8c/0xc0 [ 637.330547][ C0] ? stack_trace_consume_entry+0x160/0x160 [ 637.330551][ C0] ? __lock_acquire+0x16cb/0x5640 [ 637.330554][ C0] kasan_save_stack+0x1b/0x40 [ 637.330558][ C0] ? kasan_save_stack+0x1b/0x40 [ 637.330563][ C0] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 637.330567][ C0] ? kmem_cache_alloc+0x138/0x3a0 [ 637.330571][ C0] ? security_file_alloc+0x34/0x170 [ 637.330574][ C0] ? __alloc_file+0xd8/0x350 [ 637.330578][ C0] ? alloc_empty_file+0x6d/0x170 [ 637.330582][ C0] ? path_openat+0xe3/0x2730 [ 637.330585][ C0] ? do_filp_open+0x17e/0x3c0 [ 637.330589][ C0] ? do_sys_openat2+0x16d/0x420 [ 637.330593][ C0] ? __x64_sys_open+0x119/0x1c0 [ 637.330597][ C0] ? do_syscall_64+0x2d/0x70 [ 637.330601][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.330605][ C0] ? do_filp_open+0x17e/0x3c0 [ 637.330608][ C0] ? do_sys_openat2+0x16d/0x420 [ 637.330618][ C0] ? __x64_sys_open+0x119/0x1c0 [ 637.330621][ C0] ? do_syscall_64+0x2d/0x70 [ 637.330626][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.330630][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.330634][ C0] ? lock_acquire+0x1f1/0xad0 [ 637.330638][ C0] ? fs_reclaim_acquire+0xa1/0xf0 [ 637.330641][ C0] ? find_held_lock+0x2d/0x110 [ 637.330645][ C0] ? fs_reclaim_release+0x90/0xd0 [ 637.330649][ C0] ? lock_downgrade+0x830/0x830 [ 637.330653][ C0] ? lock_is_held_type+0xbb/0xf0 [ 637.330657][ C0] ? unwind_get_return_address+0x51/0x90 [ 637.330661][ C0] ? kasan_unpoison_shadow+0x33/0x40 [ 637.330666][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 637.330669][ C0] kmem_cache_alloc+0x138/0x3a0 [ 637.330673][ C0] security_file_alloc+0x34/0x170 [ 637.330677][ C0] __alloc_file+0xd8/0x350 [ 637.330681][ C0] alloc_empty_file+0x6d/0x170 [ 637.330684][ C0] path_openat+0xe3/0x2730 [ 637.330688][ C0] ? __lock_acquire+0x16cb/0x5640 [ 637.330692][ C0] ? path_lookupat+0x830/0x830 [ 637.330697][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.330701][ C0] ? lock_is_held_type+0xbb/0xf0 [ 637.330704][ C0] do_filp_open+0x17e/0x3c0 [ 637.330708][ C0] ? may_open_dev+0xf0/0xf0 [ 637.330712][ C0] ? __alloc_fd+0x28d/0x600 [ 637.330716][ C0] ? lock_downgrade+0x830/0x830 [ 637.330720][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 637.330723][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 637.330727][ C0] ? _raw_spin_unlock+0x24/0x40 [ 637.330731][ C0] ? __alloc_fd+0x28d/0x600 [ 637.330735][ C0] do_sys_openat2+0x16d/0x420 [ 637.330739][ C0] ? seccomp_notify_ioctl+0xd90/0xd90 [ 637.330743][ C0] ? strncpy_from_user+0x2bf/0x3e0 [ 637.330747][ C0] ? build_open_flags+0x650/0x650 [ 637.330751][ C0] ? getname_flags.part.0+0x1dd/0x4f0 [ 637.330754][ C0] __x64_sys_open+0x119/0x1c0 [ 637.330758][ C0] ? do_sys_open+0x140/0x140 [ 637.330762][ C0] ? __secure_computing+0x104/0x360 [ 637.330766][ C0] do_syscall_64+0x2d/0x70 [ 637.330770][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.330774][ C0] RIP: 0033:0x7f51be459840 [ 637.330785][ C0] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 637.330790][ C0] RSP: 002b:00007ffc5d86deb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 637.330799][ C0] RAX: ffffffffffffffda RBX: 00007ffc5d86e1c0 RCX: 00007f51be459840 [ 637.330805][ C0] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000561459f46820 [ 637.330810][ C0] RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff [ 637.330816][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 637.330821][ C0] R13: 0000561459f3a040 R14: 00007ffc5d86e180 R15: 0000561459f46870 [ 637.330828][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 0.000 msecs [ 637.331220][ T1154] Kernel panic - not syncing: hung_task: blocked tasks [ 637.901004][ T1154] CPU: 1 PID: 1154 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.909232][ T1154] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.919283][ T1154] Call Trace: [ 637.922564][ T1154] dump_stack+0x18f/0x20d [ 637.926944][ T1154] panic+0x2e3/0x75c [ 637.930827][ T1154] ? __warn_printk+0xf3/0xf3 [ 637.935397][ T1154] ? cpumask_next+0x3c/0x40 [ 637.940089][ T1154] ? printk_safe_flush+0xd6/0x120 [ 637.945096][ T1154] ? watchdog.cold+0x5/0x16b [ 637.949670][ T1154] ? watchdog+0xa82/0x1000 [ 637.954073][ T1154] watchdog.cold+0x16/0x16b [ 637.958562][ T1154] ? reset_hung_task_detector+0x30/0x30 [ 637.968661][ T1154] kthread+0x3b5/0x4a0 [ 637.973153][ T1154] ? __kthread_bind_mask+0xc0/0xc0 [ 637.978338][ T1154] ? __kthread_bind_mask+0xc0/0xc0 [ 637.983442][ T1154] ret_from_fork+0x1f/0x30 [ 637.989305][ T1154] Kernel Offset: disabled [ 637.993654][ T1154] Rebooting in 86400 seconds..