Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 527.870429] INFO: task syz-executor023:7847 blocked for more than 140 seconds. [ 527.878036] Not tainted 5.0.0-rc5 #59 [ 527.882414] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 527.890397] syz-executor023 D27264 7847 7845 0x80000000 [ 527.896038] Call Trace: [ 527.898702] __schedule+0x817/0x1cc0 [ 527.902511] ? trace_hardirqs_off+0x62/0x220 [ 527.906918] ? pci_mmcfg_check_reserved+0x170/0x170 [ 527.911989] ? mark_held_locks+0x100/0x100 [ 527.916222] schedule+0x92/0x180 [ 527.919570] schedule_timeout+0x8ca/0xfd0 [ 527.923758] ? wait_for_completion+0x294/0x440 [ 527.928326] ? find_held_lock+0x35/0x130 [ 527.932406] ? usleep_range+0x170/0x170 [ 527.936450] ? kasan_check_read+0x11/0x20 [ 527.940660] ? _raw_spin_unlock_irq+0x28/0x90 [ 527.945168] ? wait_for_completion+0x294/0x440 [ 527.949730] ? _raw_spin_unlock_irq+0x28/0x90 [ 527.954256] ? lockdep_hardirqs_on+0x415/0x5d0 [ 527.958850] ? trace_hardirqs_on+0x67/0x230 [ 527.963217] ? kasan_check_read+0x11/0x20 [ 527.967372] wait_for_completion+0x29c/0x440 [ 527.971842] ? lockdep_hardirqs_on+0x415/0x5d0 [ 527.976429] ? wait_for_completion_interruptible+0x4b0/0x4b0 [ 527.982323] ? wake_up_q+0x100/0x100 [ 527.986087] ? percpu_ref_kill_and_confirm+0x1b7/0x3b0 [ 527.991538] exit_aio+0x321/0x3a0 [ 527.994998] ? io_submit_one+0x1cf0/0x1cf0 [ 527.999222] ? mutex_unlock+0xd/0x10 [ 528.003021] mmput+0xcf/0x4c0 [ 528.006169] do_exit+0x838/0x2fd0 [ 528.009619] ? lock_downgrade+0x810/0x810 [ 528.013805] ? kasan_check_read+0x11/0x20 [ 528.017955] ? mm_update_next_owner+0x660/0x660 [ 528.022667] ? __x64_sys_io_submit+0x37d/0x580 [ 528.027258] ? __ia32_sys_io_destroy+0x420/0x420 [ 528.032093] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 528.036854] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 528.041655] do_group_exit+0x135/0x370 [ 528.045560] __x64_sys_exit_group+0x44/0x50 [ 528.049863] do_syscall_64+0x103/0x610 [ 528.053787] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 528.058982] RIP: 0033:0x43ed88 [ 528.062237] Code: Bad RIP value. [ 528.065602] RSP: 002b:00007ffed7009528 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 528.073339] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ed88 [ 528.080639] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 528.087903] RBP: 00000000004be688 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 528.095200] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 528.102507] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 528.109777] [ 528.109777] Showing all locks held in the system: [ 528.116141] 1 lock held by khungtaskd/1039: [ 528.120487] #0: 0000000010aa4340 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 528.129085] 1 lock held by rsyslogd/7731: [ 528.133288] 2 locks held by getty/7822: [ 528.137256] #0: 0000000012f1b073 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.145551] #1: 000000008e4f779a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.154503] 2 locks held by getty/7823: [ 528.158456] #0: 000000009fb69644 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.166764] #1: 00000000091422cd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.175658] 2 locks held by getty/7824: [ 528.179617] #0: 00000000e314dcb1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.187908] #1: 0000000095831941 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.196803] 2 locks held by getty/7825: [ 528.200807] #0: 000000006450426f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.209055] #1: 0000000083748d6e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.217936] 2 locks held by getty/7826: [ 528.221934] #0: 00000000fcf864ce (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.230154] #1: 00000000556e6cfa (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.239024] 2 locks held by getty/7827: [ 528.243019] #0: 00000000d27a2cb6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.251288] #1: 00000000c075850d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.260149] 2 locks held by getty/7828: [ 528.264160] #0: 000000004c21d0d8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 528.272483] #1: 000000005f390979 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 528.281372] [ 528.282998] ============================================= [ 528.282998] [ 528.289988] NMI backtrace for cpu 1 [ 528.293648] CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc5 #59 [ 528.300403] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 528.309737] Call Trace: [ 528.312350] dump_stack+0x172/0x1f0 [ 528.315970] nmi_cpu_backtrace.cold+0x63/0xa4 [ 528.320493] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 528.325408] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 528.330668] arch_trigger_cpumask_backtrace+0x14/0x20 [ 528.335868] watchdog+0x9df/0xee0 [ 528.339484] kthread+0x357/0x430 [ 528.342842] ? reset_hung_task_detector+0x30/0x30 [ 528.347664] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 528.353191] ret_from_fork+0x3a/0x50 [ 528.356999] Sending NMI from CPU 1 to CPUs 0: [ 528.361582] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x2/0x10 [ 528.362530] Kernel panic - not syncing: hung_task: blocked tasks [ 528.375259] CPU: 1 PID: 1039 Comm: khungtaskd Not tainted 5.0.0-rc5 #59 [ 528.381987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 528.391321] Call Trace: [ 528.393890] dump_stack+0x172/0x1f0 [ 528.397501] panic+0x2cb/0x65c [ 528.400782] ? __warn_printk+0xf3/0xf3 [ 528.404657] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 528.409696] ? printk_safe_flush+0xf2/0x140 [ 528.414004] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 528.419761] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 528.424672] ? nmi_trigger_cpumask_backtrace+0x1a7/0x236 [ 528.430238] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 528.435694] watchdog+0x9f0/0xee0 [ 528.439137] kthread+0x357/0x430 [ 528.442487] ? reset_hung_task_detector+0x30/0x30 [ 528.447313] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 528.452834] ret_from_fork+0x3a/0x50 [ 528.457630] Kernel Offset: disabled [ 528.461294] Rebooting in 86400 seconds..