[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.77' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 636.770546][ T1165] INFO: task syz-executor010:6835 blocked for more than 143 seconds. [ 636.778784][ T1165] Not tainted 5.9.0-rc2-syzkaller #0 [ 636.786309][ T1165] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 636.795759][ T1165] task:syz-executor010 state:D stack:26840 pid: 6835 ppid: 6829 flags:0x20020000 [ 636.805080][ T1165] Call Trace: [ 636.808460][ T1165] __schedule+0x8e5/0x21e0 [ 636.812934][ T1165] ? io_schedule_timeout+0x140/0x140 [ 636.818227][ T1165] schedule+0xd0/0x2a0 [ 636.822408][ T1165] schedule_timeout+0x1d8/0x250 [ 636.827265][ T1165] ? usleep_range+0x170/0x170 [ 636.832098][ T1165] ? lock_downgrade+0x830/0x830 [ 636.836986][ T1165] ? do_raw_spin_lock+0x120/0x2b0 [ 636.842067][ T1165] ? _raw_spin_unlock_irq+0x1f/0x80 [ 636.847260][ T1165] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 636.853348][ T1165] ? trace_hardirqs_on+0x5f/0x220 [ 636.858383][ T1165] wait_for_completion_timeout+0x15e/0x270 [ 636.864232][ T1165] ? wait_for_completion_io+0x260/0x260 [ 636.869864][ T1165] ? usb_submit_urb+0xb56/0x1320 [ 636.874867][ T1165] ? lockdep_init_map_waits+0x1b3/0x8a0 [ 636.880486][ T1165] usb_start_wait_urb+0x144/0x2b0 [ 636.885497][ T1165] ? usb_api_blocking_completion+0xa0/0xa0 [ 636.891440][ T1165] ? memset+0x20/0x40 [ 636.895438][ T1165] usb_bulk_msg+0x226/0x550 [ 636.899961][ T1165] do_proc_bulk+0x39b/0x710 [ 636.904702][ T1165] ? do_proc_control+0x930/0x930 [ 636.909689][ T1165] ? __might_fault+0x190/0x1d0 [ 636.914499][ T1165] usbdev_ioctl+0x586/0x3360 [ 636.919097][ T1165] ? processcompl_compat+0x670/0x670 [ 636.925218][ T1165] ? __schedule+0x88e/0x21e0 [ 636.929860][ T1165] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 636.936004][ T1165] ? do_vfs_ioctl+0x27d/0x1090 [ 636.940848][ T1165] ? generic_block_fiemap+0x60/0x60 [ 636.946064][ T1165] ? __schedule+0x8ed/0x21e0 [ 636.950704][ T1165] ? io_schedule_timeout+0x140/0x140 [ 636.956062][ T1165] ? __ia32_sys_socket+0xb0/0xb0 [ 636.961058][ T1165] ? processcompl_compat+0x670/0x670 [ 636.966368][ T1165] compat_ptr_ioctl+0x67/0x90 [ 636.971084][ T1165] ? vfs_ioctl+0xd0/0xd0 [ 636.975327][ T1165] __do_compat_sys_ioctl+0x1d3/0x230 [ 636.980716][ T1165] __do_fast_syscall_32+0x57/0x80 [ 636.985745][ T1165] do_fast_syscall_32+0x2f/0x70 [ 636.990662][ T1165] entry_SYSENTER_compat_after_hwframe+0x4d/0x5c [ 636.996985][ T1165] RIP: 0023:0xf7f34549 [ 637.001077][ T1165] Code: Bad RIP value. [ 637.005172][ T1165] RSP: 002b:00000000ffc1de1c EFLAGS: 00000217 ORIG_RAX: 0000000000000036 [ 637.013614][ T1165] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c0185502 [ 637.021667][ T1165] RDX: 0000000020000000 RSI: 0000000000000036 RDI: 0000000000000003 [ 637.029630][ T1165] RBP: 000000008108551b R08: 0000000000000000 R09: 0000000000000000 [ 637.037648][ T1165] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 637.045685][ T1165] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 637.054312][ T1165] [ 637.054312][ T1165] Showing all locks held in the system: [ 637.062093][ T1165] 1 lock held by khungtaskd/1165: [ 637.067122][ T1165] #0: ffffffff89bd6900 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.077001][ T1165] [ 637.079331][ T1165] ============================================= [ 637.079331][ T1165] [ 637.087770][ T1165] NMI backtrace for cpu 0 [ 637.092170][ T1165] CPU: 0 PID: 1165 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.100401][ T1165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.110446][ T1165] Call Trace: [ 637.113850][ T1165] dump_stack+0x18f/0x20d [ 637.118211][ T1165] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.123452][ T1165] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.129075][ T1165] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 637.135033][ T1165] watchdog+0xd7d/0x1000 [ 637.139262][ T1165] ? reset_hung_task_detector+0x30/0x30 [ 637.144828][ T1165] kthread+0x3b5/0x4a0 [ 637.148886][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 637.153974][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 637.159083][ T1165] ret_from_fork+0x1f/0x30 [ 637.163595][ T1165] Sending NMI from CPU 0 to CPUs 1: [ 637.169496][ C1] NMI backtrace for cpu 1 [ 637.169503][ C1] CPU: 1 PID: 3898 Comm: systemd-journal Not tainted 5.9.0-rc2-syzkaller #0 [ 637.169509][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.169514][ C1] RIP: 0010:check_preemption_disabled+0x22/0x130 [ 637.169526][ C1] Code: e8 33 06 a5 fb eb 9f cc 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 25 f8 0d 78 65 8b 1d 3e 63 0e 78 <81> e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 [ 637.169530][ C1] RSP: 0018:ffffc90005387928 EFLAGS: 00000086 [ 637.169538][ C1] RAX: 0000000000000001 RBX: 0000000080000003 RCX: ffffffff81ab1bda [ 637.169544][ C1] RDX: dffffc0000000000 RSI: ffffffff88941820 RDI: ffffffff88941860 [ 637.169549][ C1] RBP: ffffffff88941860 R08: 0000000000000000 R09: ffffffff8ab2364f [ 637.169554][ C1] R10: fffffbfff15646c9 R11: 0000000000000000 R12: 0000000000000001 [ 637.169560][ C1] R13: ffffffff88941820 R14: ffff88812fffb700 R15: dffffc0000000000 [ 637.169566][ C1] FS: 00007fe60e53b8c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 637.169570][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.169576][ C1] CR2: 00007fe60b8db000 CR3: 0000000092824000 CR4: 00000000001506e0 [ 637.169581][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.169586][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.169589][ C1] Call Trace: [ 637.169593][ C1] rcu_is_watching+0x11/0xb0 [ 637.169597][ C1] rcu_read_lock_sched_held+0x1c/0xb0 [ 637.169602][ C1] trace_mm_page_alloc_zone_locked+0x1aa/0x220 [ 637.169606][ C1] get_page_from_freelist+0x1a8f/0x37f0 [ 637.169610][ C1] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.169614][ C1] ? lockdep_hardirqs_off+0x89/0xc0 [ 637.169618][ C1] ? __zone_watermark_ok+0x3f0/0x3f0 [ 637.169622][ C1] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 637.169626][ C1] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 637.169630][ C1] ? lockdep_hardirqs_off+0x89/0xc0 [ 637.169634][ C1] __alloc_pages_nodemask+0x2cf/0x790 [ 637.169638][ C1] ? lock_acquire+0x1f1/0xad0 [ 637.169643][ C1] ? __alloc_pages_slowpath.constprop.0+0x2860/0x2860 [ 637.169647][ C1] ? fs_reclaim_release+0x90/0xd0 [ 637.169650][ C1] cache_grow_begin+0x71/0x430 [ 637.169654][ C1] cache_alloc_refill+0x27b/0x340 [ 637.169658][ C1] ? lockdep_hardirqs_off+0x89/0xc0 [ 637.169662][ C1] kmem_cache_alloc+0x380/0x3a0 [ 637.169666][ C1] getname_flags.part.0+0x50/0x4f0 [ 637.169670][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 637.169674][ C1] getname+0x8e/0xd0 [ 637.169677][ C1] do_sys_openat2+0xf5/0x420 [ 637.169681][ C1] ? seccomp_notify_ioctl+0xd90/0xd90 [ 637.169685][ C1] ? strncpy_from_user+0x2bf/0x3e0 [ 637.169689][ C1] ? build_open_flags+0x650/0x650 [ 637.169693][ C1] ? getname_flags.part.0+0x1dd/0x4f0 [ 637.169697][ C1] __x64_sys_open+0x119/0x1c0 [ 637.169701][ C1] ? do_sys_open+0x140/0x140 [ 637.169704][ C1] ? __secure_computing+0x104/0x360 [ 637.169708][ C1] do_syscall_64+0x2d/0x70 [ 637.169712][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 637.169716][ C1] RIP: 0033:0x7fe60dacb840 [ 637.169727][ C1] 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 [ 637.169731][ C1] RSP: 002b:00007ffef6ad6018 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 637.169741][ C1] RAX: ffffffffffffffda RBX: 00007ffef6ad6320 RCX: 00007fe60dacb840 [ 637.169746][ C1] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055e0db336760 [ 637.169751][ C1] RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff [ 637.169757][ C1] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 637.169762][ C1] R13: 000055e0db332040 R14: 00007ffef6ad62e0 R15: 000055e0db33d860 [ 637.169853][ T1165] Kernel panic - not syncing: hung_task: blocked tasks [ 637.546865][ T1165] CPU: 0 PID: 1165 Comm: khungtaskd Not tainted 5.9.0-rc2-syzkaller #0 [ 637.555074][ T1165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.565102][ T1165] Call Trace: [ 637.568380][ T1165] dump_stack+0x18f/0x20d [ 637.572740][ T1165] panic+0x2e3/0x75c [ 637.576620][ T1165] ? __warn_printk+0xf3/0xf3 [ 637.581188][ T1165] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 637.586795][ T1165] ? preempt_schedule_thunk+0x16/0x18 [ 637.592151][ T1165] ? watchdog.cold+0x5/0x16b [ 637.596751][ T1165] ? watchdog+0xa82/0x1000 [ 637.601146][ T1165] watchdog.cold+0x16/0x16b [ 637.605630][ T1165] ? reset_hung_task_detector+0x30/0x30 [ 637.611163][ T1165] kthread+0x3b5/0x4a0 [ 637.615219][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 637.620313][ T1165] ? __kthread_bind_mask+0xc0/0xc0 [ 637.625404][ T1165] ret_from_fork+0x1f/0x30 [ 637.630955][ T1165] Kernel Offset: disabled [ 637.635273][ T1165] Rebooting in 86400 seconds..