[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   18.835745] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.
[   19.119296] random: sshd: uninitialized urandom read (32 bytes read)
[   19.403788] random: sshd: uninitialized urandom read (32 bytes read)

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   20.129507] random: sshd: uninitialized urandom read (32 bytes read)
[   86.816931] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts.
[   92.270520] random: sshd: uninitialized urandom read (32 bytes read)
executing program
executing program
[   92.403475] FAULT_INJECTION: forcing a failure.
[   92.403475] name failslab, interval 1, probability 0, space 0, times 1
[   92.415951] CPU: 0 PID: 4455 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   92.422959] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   92.432290] Call Trace:
[   92.434872]  dump_stack+0x1b9/0x294
[   92.438482]  ? dump_stack_print_info.cold.2+0x52/0x52
[   92.443654]  should_fail.cold.4+0xa/0x1a
[   92.447698]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   92.452784]  ? lock_release+0xa10/0xa10
[   92.456742]  ? debug_check_no_locks_freed+0x310/0x310
[   92.462009]  ? __might_sleep+0x95/0x190
[   92.462076] FAULT_INJECTION: forcing a failure.
[   92.462076] name failslab, interval 1, probability 0, space 0, times 1
[   92.465977]  ? kasan_check_write+0x14/0x20
[   92.481374]  ? __mutex_lock+0x7d9/0x17f0
[   92.485420]  ? __lock_acquire+0x7f5/0x5140
[   92.489636]  ? do_raw_spin_unlock+0x9e/0x2e0
[   92.494025]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   92.499538]  __should_failslab+0x124/0x180
[   92.503754]  should_failslab+0x9/0x14
[   92.507535]  __kmalloc+0x63/0x760
[   92.510967]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   92.516048]  __tty_buffer_request_room+0x2d2/0x7f0
[   92.520954]  ? flush_to_ldisc+0x560/0x560
[   92.525080]  ? lock_acquire+0x1dc/0x520
[   92.529031]  ? pty_write+0xf9/0x1f0
[   92.532637]  ? lock_release+0xa10/0xa10
[   92.536588]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   92.541667]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   92.546665]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   92.552188]  ? do_raw_spin_lock+0xc1/0x200
[   92.556401]  pty_write+0x12c/0x1f0
[   92.559932]  n_tty_write+0xc41/0x1180
[   92.563709]  ? __check_object_size+0x95/0x5d9
[   92.568357]  ? process_echoes+0x170/0x170
[   92.572505]  ? __init_waitqueue_head+0x140/0x140
[   92.577255]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   92.582782]  ? _copy_from_user+0xdf/0x150
[   92.587449]  tty_write+0x3f1/0x880
[   92.590973]  ? process_echoes+0x170/0x170
[   92.595102]  do_iter_write+0x491/0x5f0
[   92.598968]  vfs_writev+0x1c7/0x330
[   92.602574]  ? vfs_iter_write+0xb0/0xb0
[   92.606529]  ? wait_for_completion+0x870/0x870
[   92.611100]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   92.616631]  ? __fdget_pos+0xd6/0x1e0
[   92.620412]  ? __fdget_raw+0x20/0x20
[   92.624107]  ? __sb_end_write+0xac/0xe0
[   92.628072]  do_writev+0x112/0x2f0
[   92.631592]  ? vfs_writev+0x330/0x330
[   92.635374]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   92.640195]  ? _raw_spin_unlock_irq+0x27/0x70
[   92.644684]  __x64_sys_writev+0x75/0xb0
[   92.648648]  do_syscall_64+0x1b1/0x800
[   92.652512]  ? syscall_return_slowpath+0x5c0/0x5c0
[   92.657432]  ? syscall_return_slowpath+0x30f/0x5c0
[   92.662347]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   92.667693]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   92.672518]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   92.677687] RIP: 0033:0x445959
[   92.680852] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   92.699970] RSP: 002b:00007f3350380d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   92.707655] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000445959
[   92.714904] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000003
[   92.722151] RBP: 00000000006dbc38 R08: 0000000000000001 R09: 0000000000000031
[   92.729415] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   92.736663] R13: 00007f3350380d80 R14: 0000000000000004 R15: 6d74702f7665642f
[   92.743940] CPU: 1 PID: 4456 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   92.743945] 
executing program
[   92.743954] ======================================================
[   92.743957] WARNING: possible circular locking dependency detected
[   92.743959] 4.17.0+ #87 Not tainted
[   92.743962] ------------------------------------------------------
[   92.743964] syz-executor589/4455 is trying to acquire lock:
[   92.743966]         (ptrval) (console_owner){-...}, at: console_unlock+0x583/0x1100
[   92.743974] 
[   92.743977] but task is already holding lock:
[   92.743978]         (ptrval) (&(&port->lock)->rlock){-.-.}, at: pty_write+0xf9/0x1f0
[   92.743986] 
[   92.743988] which lock already depends on the new lock.
[   92.743989] 
[   92.743991] 
[   92.743994] the existing dependency chain (in reverse order) is:
[   92.743995] 
[   92.743996] -> #2 (&(&port->lock)->rlock){-.-.}:
[   92.744004]        _raw_spin_lock_irqsave+0x96/0xc0
[   92.744006]        tty_port_tty_get+0x20/0x80
[   92.744009]        tty_port_default_wakeup+0x15/0x40
[   92.744011]        tty_port_tty_wakeup+0x5d/0x70
[   92.744013]        uart_write_wakeup+0x44/0x60
[   92.744015]        serial8250_tx_chars+0x4be/0xb60
[   92.744018]        serial8250_handle_irq.part.25+0x1ee/0x280
[   92.744021]        serial8250_default_handle_irq+0xc8/0x150
[   92.744023]        serial8250_interrupt+0xfa/0x1d0
[   92.744026]        __handle_irq_event_percpu+0x1c0/0xad0
[   92.744028]        handle_irq_event_percpu+0x98/0x1c0
[   92.744030]        handle_irq_event+0xa7/0x135
[   92.744032]        handle_edge_irq+0x20f/0x870
[   92.744034]        handle_irq+0x18c/0x2e7
[   92.744036]        do_IRQ+0x78/0x190
[   92.744038]        ret_from_intr+0x0/0x1e
[   92.744041]        _raw_spin_unlock_irqrestore+0xa1/0xc0
[   92.744043]        uart_write+0x3df/0x620
[   92.744045]        n_tty_write+0x6b9/0x1180
[   92.744047]        tty_write+0x3f1/0x880
[   92.744049]        redirected_tty_write+0xaf/0xc0
[   92.744052]        __vfs_write+0x10b/0x960
[   92.744053]        vfs_write+0x1f8/0x560
[   92.744055]        ksys_write+0xf9/0x250
[   92.744058]        __x64_sys_write+0x73/0xb0
[   92.744060]        do_syscall_64+0x1b1/0x800
[   92.744062]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   92.744063] 
[   92.744064] -> #1 (&port_lock_key){-.-.}:
[   92.744072]        _raw_spin_lock_irqsave+0x96/0xc0
[   92.744074]        serial8250_console_write+0x8d5/0xb00
[   92.744077]        univ8250_console_write+0x5f/0x70
[   92.744079]        console_unlock+0xac2/0x1100
[   92.744081]        vprintk_emit+0x6ad/0xdd0
[   92.744083]        vprintk_default+0x28/0x30
[   92.744085]        vprintk_func+0x7a/0xe7
[   92.744087]        printk+0x9e/0xba
[   92.744089]        register_console+0x7e7/0xc00
[   92.744092]        univ8250_console_init+0x3f/0x4b
[   92.744094]        console_init+0x6d9/0xa38
[   92.744096]        start_kernel+0x608/0x92d
[   92.744098]        x86_64_start_reservations+0x29/0x2b
[   92.744100]        x86_64_start_kernel+0x76/0x79
[   92.744103]        secondary_startup_64+0xa5/0xb0
[   92.744104] 
[   92.744105] -> #0 (console_owner){-...}:
[   92.744112]        lock_acquire+0x1dc/0x520
[   92.744114]        console_unlock+0x5ef/0x1100
[   92.744116]        vprintk_emit+0x6ad/0xdd0
[   92.744118]        vprintk_default+0x28/0x30
[   92.744120]        vprintk_func+0x7a/0xe7
[   92.744122]        printk+0x9e/0xba
[   92.744124]        should_fail+0x97a/0xbcd
[   92.744127]        __should_failslab+0x124/0x180
[   92.744129]        should_failslab+0x9/0x14
[   92.744131]        __kmalloc+0x63/0x760
[   92.744133]        __tty_buffer_request_room+0x2d2/0x7f0
[   92.744136]        tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   92.744138]        pty_write+0x12c/0x1f0
[   92.744140]        n_tty_write+0xc41/0x1180
[   92.744142]        tty_write+0x3f1/0x880
[   92.744144]        do_iter_write+0x491/0x5f0
[   92.744146]        vfs_writev+0x1c7/0x330
[   92.744148]        do_writev+0x112/0x2f0
[   92.744150]        __x64_sys_writev+0x75/0xb0
[   92.744152]        do_syscall_64+0x1b1/0x800
[   92.744155]        entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   92.744156] 
[   92.744158] other info that might help us debug this:
[   92.744160] 
[   92.744161] Chain exists of:
[   92.744162]   console_owner --> &port_lock_key --> &(&port->lock)->rlock
[   92.744172] 
[   92.744174]  Possible unsafe locking scenario:
[   92.744175] 
[   92.744177]        CPU0                    CPU1
[   92.744179]        ----                    ----
[   92.744180]   lock(&(&port->lock)->rlock);
[   92.744186]                                lock(&port_lock_key);
[   92.744191]                                lock(&(&port->lock)->rlock);
[   92.744195]   lock(console_owner);
[   92.744199] 
[   92.744200]  *** DEADLOCK ***
[   92.744201] 
[   92.744204] 6 locks held by syz-executor589/4455:
[   92.744205]  #0:         (ptrval) (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40
[   92.744214]  #1:         (ptrval) (&tty->atomic_write_lock){+.+.}, at: tty_write_lock+0x57/0x90
[   92.744223]  #2:         (ptrval) (&tty->termios_rwsem){++++}, at: n_tty_write+0x25a/0x1180
[   92.744232]  #3:         (ptrval) (&ldata->output_lock){+.+.}, at: n_tty_write+0xc05/0x1180
[   92.744241]  #4:         (ptrval) (&(&port->lock)->rlock){-.-.}, at: pty_write+0xf9/0x1f0
[   92.744250]  #5:         (ptrval) (console_lock){+.+.}, at: vprintk_emit+0x694/0xdd0
[   92.744258] 
[   92.744260] stack backtrace:
[   92.744263] CPU: 0 PID: 4455 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   92.744267] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   92.744269] Call Trace:
[   92.744271]  dump_stack+0x1b9/0x294
[   92.744273]  ? dump_stack_print_info.cold.2+0x52/0x52
[   92.744275]  ? vprintk_func+0xd0/0xe7
[   92.744278]  print_circular_bug.isra.36.cold.56+0x1bd/0x27d
[   92.744280]  ? save_trace+0xe0/0x290
[   92.744282]  __lock_acquire+0x343e/0x5140
[   92.744285]  ? debug_check_no_locks_freed+0x310/0x310
[   92.744287]  ? kasan_check_read+0x11/0x20
[   92.744289]  ? put_dec_trunc8+0x273/0x300
[   92.744291]  ? number+0x967/0xc90
[   92.744294]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   92.744296]  ? format_decode+0x1a9/0xae0
[   92.744298]  ? set_precision+0xe0/0xe0
[   92.744300]  ? graph_lock+0x170/0x170
[   92.744302]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   92.744304]  ? pointer+0xa10/0xa10
[   92.744306]  lock_acquire+0x1dc/0x520
[   92.744308]  ? console_unlock+0x583/0x1100
[   92.744310]  ? lock_release+0xa10/0xa10
[   92.744313]  ? kasan_check_read+0x11/0x20
[   92.744315]  ? do_raw_spin_unlock+0x9e/0x2e0
[   92.744317]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   92.744319]  ? kasan_check_write+0x14/0x20
[   92.744322]  ? do_raw_spin_lock+0xc1/0x200
[   92.744324]  console_unlock+0x5ef/0x1100
[   92.744326]  ? console_unlock+0x583/0x1100
[   92.744328]  ? wake_up_klogd+0x100/0x100
[   92.744330]  ? kasan_check_write+0x14/0x20
[   92.744332]  ? do_raw_spin_lock+0xc1/0x200
[   92.744335]  ? trace_hardirqs_off+0xd/0x10
[   92.744337]  ? _raw_spin_unlock_irqrestore+0x63/0xc0
[   92.744339]  ? vprintk_emit+0x694/0xdd0
[   92.744342]  ? __down_trylock_console_sem+0x155/0x200
[   92.744344]  vprintk_emit+0x6ad/0xdd0
[   92.744346]  ? console_unlock+0x1100/0x1100
[   92.744348]  ? _raw_spin_unlock_irq+0x27/0x70
[   92.744351]  ? debug_check_no_locks_freed+0x310/0x310
[   92.744353]  ? finish_task_switch+0x1ca/0x840
[   92.744355]  ? finish_task_switch+0x182/0x840
[   92.744358]  ? print_usage_bug+0xc0/0xc0
[   92.744360]  vprintk_default+0x28/0x30
[   92.744362]  vprintk_func+0x7a/0xe7
[   92.744363]  printk+0x9e/0xba
[   92.744366]  ? kmsg_dump_rewind_nolock+0xe4/0xe4
[   92.744368]  should_fail+0x97a/0xbcd
[   92.744370]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   92.744372]  ? lock_release+0xa10/0xa10
[   92.744375]  ? debug_check_no_locks_freed+0x310/0x310
[   92.744377]  ? __might_sleep+0x95/0x190
[   92.744379]  ? kasan_check_write+0x14/0x20
[   92.744381]  ? __mutex_lock+0x7d9/0x17f0
[   92.744383]  ? __lock_acquire+0x7f5/0x5140
[   92.744386]  ? do_raw_spin_unlock+0x9e/0x2e0
[   92.744388]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   92.744391]  __should_failslab+0x124/0x180
[   92.744393]  should_failslab+0x9/0x14
[   92.744394]  __kmalloc+0x63/0x760
[   92.744397]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   92.744399]  __tty_buffer_request_room+0x2d2/0x7f0
[   92.744402]  ? flush_to_ldisc+0x560/0x560
[   92.744404]  ? lock_acquire+0x1dc/0x520
[   92.744406]  ? pty_write+0xf9/0x1f0
[   92.744408]  ? lock_release+0xa10/0xa10
[   92.744410]  ? _raw_spin_unlock_irqrestore+0x74/0xc0
[   92.744413]  ? trace_hardirqs_on_caller+0x421/0x5c0
[   92.744415]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   92.744418]  ? do_raw_spin_lock+0xc1/0x200
[   92.744419]  pty_write+0x12c/0x1f0
[   92.744422]  n_tty_write+0xc41/0x1180
[   92.744424]  ? __check_object_size+0x95/0x5d9
[   92.744426]  ? process_echoes+0x170/0x170
[   92.744428]  ? __init_waitqueue_head+0x140/0x140
[   92.744431]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   92.744433]  ? _copy_from_user+0xdf/0x150
[   92.744435]  tty_write+0x3f1/0x880
[   92.744438]  ? process_echoes+0x170/0x170
[   92.744440]  do_iter_write+0x491/0x5f0
[   92.744442]  vfs_writev+0x1c7/0x330
[   92.744444]  ? vfs_iter_write+0xb0/0xb0
[   92.744446]  ? wait_for_completion+0x870/0x870
[   92.744449]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   92.744451]  ? __fdget_pos+0xd6/0x1e0
[   92.744453]  ? __fdget_raw+0x20/0x20
[   92.744455]  ? __sb_end_write+0xac/0xe0
[   92.744457]  do_writev+0x112/0x2f0
[   92.744459]  ? vfs_writev+0x330/0x330
[   92.744462]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   92.744464]  ? _raw_spin_unlock_irq+0x27/0x70
[   92.744466]  __x64_sys_writev+0x75/0xb0
[   92.744468]  do_syscall_64+0x1b1/0x800
[   92.744474]  ? syscall_return_slowpath+0x5c0/0x5c0
[   92.744477]  ? syscall_return_slowpath+0x30f/0x5c0
[   92.744479]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   92.744482]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   92.744484]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   92.744486] RIP: 0033:0x445959
[   92.744487] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   92.744561] RSP: 002b:00007f3350380d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   92.744567] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000445959
[   92.744570] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000003
[   92.744574] RBP: 00000000006dbc38 R08: 0000000000000001 R09: 0000000000000031
[   92.744577] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   92.744580] R13: 00007f3350380d80 R14: 0000000000000004 R15: 6d74702f7665642f
[   92.820571] FAULT_INJECTION: forcing a failure.
[   92.820571] name failslab, interval 1, probability 0, space 0, times 0
[   92.825105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   93.760516] Call Trace:
[   93.763099]  dump_stack+0x1b9/0x294
[   93.766713]  ? dump_stack_print_info.cold.2+0x52/0x52
[   93.771882]  should_fail.cold.4+0xa/0x1a
[   93.775922]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   93.780999]  ? lock_downgrade+0x8e0/0x8e0
[   93.785123]  ? lock_release+0xa10/0xa10
[   93.789076]  ? kasan_check_read+0x11/0x20
[   93.793200]  ? rcu_note_context_switch+0x710/0x710
[   93.798105]  ? debug_check_no_locks_freed+0x310/0x310
[   93.803272]  ? __might_sleep+0x95/0x190
[   93.807222]  ? kasan_check_write+0x14/0x20
[   93.811433]  ? __mutex_lock+0x7d9/0x17f0
[   93.815467]  ? __mutex_lock+0x95d/0x17f0
[   93.819505]  ? n_tty_write+0xc05/0x1180
[   93.823452]  ? debug_mutex_add_waiter+0x220/0x220
[   93.828270]  ? do_raw_spin_unlock+0x9e/0x2e0
[   93.832663]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   93.837218]  ? debug_mutex_wake_waiter+0x620/0x620
[   93.842123]  ? kasan_check_write+0x14/0x20
[   93.846335]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   93.851849]  __should_failslab+0x124/0x180
[   93.856068]  should_failslab+0x9/0x14
[   93.859845]  __kmalloc+0x63/0x760
[   93.863274]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   93.868356]  __tty_buffer_request_room+0x2d2/0x7f0
[   93.873263]  ? flush_to_ldisc+0x560/0x560
[   93.877387]  ? lock_acquire+0x1dc/0x520
[   93.881335]  ? pty_write+0xf9/0x1f0
[   93.884945]  ? do_raw_spin_unlock+0x9e/0x2e0
[   93.889328]  ? lock_release+0xa10/0xa10
[   93.893280]  ? kasan_check_write+0x14/0x20
[   93.897487]  ? do_raw_spin_lock+0xc1/0x200
[   93.901699]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   93.907211]  ? do_raw_spin_lock+0xc1/0x200
[   93.911422]  pty_write+0x12c/0x1f0
[   93.914940]  n_tty_write+0xc41/0x1180
[   93.918720]  ? __check_object_size+0x95/0x5d9
[   93.923201]  ? process_echoes+0x170/0x170
[   93.927324]  ? __init_waitqueue_head+0x140/0x140
[   93.932059]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   93.937571]  ? _copy_from_user+0xdf/0x150
[   93.941693]  tty_write+0x3f1/0x880
[   93.945211]  ? process_echoes+0x170/0x170
[   93.949336]  do_iter_write+0x491/0x5f0
[   93.953205]  vfs_writev+0x1c7/0x330
[   93.956811]  ? vfs_iter_write+0xb0/0xb0
[   93.960762]  ? wait_for_completion+0x870/0x870
[   93.965318]  ? lock_release+0xa10/0xa10
[   93.969272]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   93.974784]  ? fsnotify+0x415/0xfc0
[   93.978385]  ? fsnotify+0xfc0/0xfc0
[   93.981990]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   93.987501]  ? __fdget_pos+0xd6/0x1e0
[   93.991279]  ? __fdget_raw+0x20/0x20
[   93.994969]  ? __sb_end_write+0xac/0xe0
[   93.998918]  do_writev+0x112/0x2f0
[   94.002442]  ? vfs_writev+0x330/0x330
[   94.006230]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   94.011047]  ? _raw_spin_unlock_irq+0x27/0x70
[   94.015527]  __x64_sys_writev+0x75/0xb0
[   94.019476]  do_syscall_64+0x1b1/0x800
[   94.023350]  ? syscall_return_slowpath+0x5c0/0x5c0
[   94.028258]  ? syscall_return_slowpath+0x30f/0x5c0
[   94.033163]  ? entry_SYSCALL_64_after_hwframe+0x59/0xbe
[   94.038503]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   94.043322]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   94.048497] RIP: 0033:0x445959
[   94.051666] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   94.070789] RSP: 002b:00007f335035fd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   94.078472] RAX: ffffffffffffffda RBX: 00000000006dbc54 RCX: 0000000000445959
[   94.085724] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000005
[   94.092970] RBP: 00000000006dbc50 R08: 0000000000000001 R09: 0000000000000031
[   94.100217] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
executing program
[   94.107463] R13: 00007f335035fd80 R14: 0000000000000006 R15: 6d74702f7665642f
[   94.114724] CPU: 0 PID: 4457 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   94.121743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.131075] Call Trace:
[   94.133650]  dump_stack+0x1b9/0x294
[   94.137262]  ? dump_stack_print_info.cold.2+0x52/0x52
[   94.142439]  should_fail.cold.4+0xa/0x1a
[   94.146489]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   94.151575]  ? lock_downgrade+0x8e0/0x8e0
[   94.155703]  ? lock_release+0xa10/0xa10
[   94.159682]  ? kasan_check_read+0x11/0x20
[   94.163812]  ? rcu_note_context_switch+0x710/0x710
[   94.168212] FAULT_INJECTION: forcing a failure.
[   94.168212] name failslab, interval 1, probability 0, space 0, times 0
[   94.168726]  ? debug_check_no_locks_freed+0x310/0x310
[   94.185072]  ? __might_sleep+0x95/0x190
[   94.189034]  ? kasan_check_write+0x14/0x20
[   94.193247]  ? __mutex_lock+0x7d9/0x17f0
[   94.197299]  ? __mutex_lock+0x95d/0x17f0
[   94.201347]  ? n_tty_write+0xc05/0x1180
[   94.205298]  ? debug_mutex_add_waiter+0x220/0x220
[   94.210119]  ? do_raw_spin_unlock+0x9e/0x2e0
[   94.214513]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   94.219070]  ? debug_mutex_wake_waiter+0x620/0x620
[   94.223975]  ? kasan_check_write+0x14/0x20
[   94.228191]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   94.233704]  __should_failslab+0x124/0x180
[   94.237919]  should_failslab+0x9/0x14
[   94.241694]  __kmalloc+0x63/0x760
[   94.245141]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   94.250222]  __tty_buffer_request_room+0x2d2/0x7f0
[   94.255130]  ? flush_to_ldisc+0x560/0x560
[   94.259429]  ? lock_acquire+0x1dc/0x520
[   94.263378]  ? pty_write+0xf9/0x1f0
[   94.266987]  ? do_raw_spin_unlock+0x9e/0x2e0
[   94.271371]  ? lock_release+0xa10/0xa10
[   94.275323]  ? kasan_check_write+0x14/0x20
[   94.279533]  ? do_raw_spin_lock+0xc1/0x200
[   94.283742]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   94.289256]  ? do_raw_spin_lock+0xc1/0x200
[   94.293469]  pty_write+0x12c/0x1f0
[   94.296999]  n_tty_write+0xc41/0x1180
[   94.300782]  ? __check_object_size+0x95/0x5d9
[   94.305254]  ? process_echoes+0x170/0x170
[   94.309378]  ? __init_waitqueue_head+0x140/0x140
[   94.314116]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   94.319635]  ? _copy_from_user+0xdf/0x150
[   94.323758]  tty_write+0x3f1/0x880
[   94.327274]  ? process_echoes+0x170/0x170
[   94.331398]  do_iter_write+0x491/0x5f0
[   94.335262]  vfs_writev+0x1c7/0x330
[   94.338865]  ? vfs_iter_write+0xb0/0xb0
[   94.342814]  ? wait_for_completion+0x870/0x870
[   94.347373]  ? lock_release+0xa10/0xa10
[   94.351329]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   94.356844]  ? fsnotify+0x415/0xfc0
[   94.360455]  ? fsnotify+0xfc0/0xfc0
[   94.364060]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   94.369572]  ? __fdget_pos+0xd6/0x1e0
[   94.373351]  ? __fdget_raw+0x20/0x20
[   94.377039]  ? __sb_end_write+0xac/0xe0
[   94.381002]  do_writev+0x112/0x2f0
[   94.384516]  ? vfs_writev+0x330/0x330
[   94.388303]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   94.393123]  __x64_sys_writev+0x75/0xb0
[   94.397072]  do_syscall_64+0x1b1/0x800
[   94.400939]  ? finish_task_switch+0x1ca/0x840
[   94.405413]  ? syscall_return_slowpath+0x5c0/0x5c0
[   94.410316]  ? syscall_return_slowpath+0x30f/0x5c0
[   94.415225]  ? prepare_exit_to_usermode+0x390/0x390
[   94.420223]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   94.425044]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   94.430208] RIP: 0033:0x445959
[   94.433388] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   94.452604] RSP: 002b:00007f335033ed78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
executing program
[   94.460307] RAX: ffffffffffffffda RBX: 00000000006dbc6c RCX: 0000000000445959
[   94.467561] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000007
[   94.474814] RBP: 00000000006dbc68 R08: 0000000000000001 R09: 0000000000000031
[   94.482069] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   94.489322] R13: 00007f335033ed80 R14: 0000000000000008 R15: 6d74702f7665642f
[   94.496590] CPU: 1 PID: 4458 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   94.503599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.512938] Call Trace:
[   94.515525]  dump_stack+0x1b9/0x294
[   94.519149]  ? dump_stack_print_info.cold.2+0x52/0x52
[   94.524338]  should_fail.cold.4+0xa/0x1a
[   94.528384]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   94.533473]  ? lock_downgrade+0x8e0/0x8e0
[   94.537598]  ? lock_release+0xa10/0xa10
[   94.541550]  ? kasan_check_read+0x11/0x20
[   94.545708]  ? rcu_note_context_switch+0x710/0x710
[   94.550614]  ? debug_check_no_locks_freed+0x310/0x310
[   94.550950] FAULT_INJECTION: forcing a failure.
[   94.550950] name failslab, interval 1, probability 0, space 0, times 0
[   94.555799]  ? __might_sleep+0x95/0x190
[   94.570903]  ? kasan_check_write+0x14/0x20
[   94.575125]  ? __mutex_lock+0x7d9/0x17f0
[   94.579169]  ? __mutex_lock+0x95d/0x17f0
[   94.583229]  ? n_tty_write+0xc05/0x1180
[   94.587186]  ? debug_mutex_add_waiter+0x220/0x220
[   94.592020]  ? do_raw_spin_unlock+0x9e/0x2e0
[   94.596417]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   94.600991]  ? debug_mutex_wake_waiter+0x620/0x620
[   94.605905]  ? kasan_check_write+0x14/0x20
[   94.610130]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   94.615711]  __should_failslab+0x124/0x180
[   94.619933]  should_failslab+0x9/0x14
[   94.623716]  __kmalloc+0x63/0x760
[   94.627161]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   94.632251]  __tty_buffer_request_room+0x2d2/0x7f0
[   94.637168]  ? flush_to_ldisc+0x560/0x560
[   94.641302]  ? lock_acquire+0x1dc/0x520
[   94.645263]  ? pty_write+0xf9/0x1f0
[   94.648900]  ? do_raw_spin_unlock+0x9e/0x2e0
[   94.653294]  ? lock_release+0xa10/0xa10
[   94.657255]  ? kasan_check_write+0x14/0x20
[   94.661478]  ? do_raw_spin_lock+0xc1/0x200
[   94.665700]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   94.671226]  ? do_raw_spin_lock+0xc1/0x200
[   94.675447]  pty_write+0x12c/0x1f0
[   94.678978]  n_tty_write+0xc41/0x1180
[   94.682773]  ? __check_object_size+0x95/0x5d9
[   94.687256]  ? process_echoes+0x170/0x170
[   94.691389]  ? __init_waitqueue_head+0x140/0x140
[   94.696137]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   94.701662]  ? _copy_from_user+0xdf/0x150
[   94.705798]  tty_write+0x3f1/0x880
[   94.709323]  ? process_echoes+0x170/0x170
[   94.713487]  do_iter_write+0x491/0x5f0
[   94.717367]  vfs_writev+0x1c7/0x330
[   94.720979]  ? vfs_iter_write+0xb0/0xb0
[   94.724941]  ? wait_for_completion+0x870/0x870
[   94.729507]  ? lock_release+0xa10/0xa10
[   94.733466]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   94.738990]  ? fsnotify+0x415/0xfc0
[   94.742603]  ? fsnotify+0xfc0/0xfc0
[   94.746228]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   94.751767]  ? __fdget_pos+0xd6/0x1e0
[   94.755554]  ? __fdget_raw+0x20/0x20
[   94.759263]  ? __sb_end_write+0xac/0xe0
[   94.763226]  do_writev+0x112/0x2f0
[   94.766764]  ? vfs_writev+0x330/0x330
[   94.770556]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   94.775386]  __x64_sys_writev+0x75/0xb0
[   94.779344]  do_syscall_64+0x1b1/0x800
[   94.783227]  ? finish_task_switch+0x1ca/0x840
[   94.787708]  ? syscall_return_slowpath+0x5c0/0x5c0
[   94.792633]  ? syscall_return_slowpath+0x30f/0x5c0
[   94.797548]  ? prepare_exit_to_usermode+0x390/0x390
[   94.802554]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   94.807385]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   94.812559] RIP: 0033:0x445959
[   94.815732] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   94.834936] RSP: 002b:00007f335031dd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   94.842627] RAX: ffffffffffffffda RBX: 00000000006dbc84 RCX: 0000000000445959
[   94.849880] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000009
[   94.857133] RBP: 00000000006dbc80 R08: 0000000000000001 R09: 0000000000000031
executing program
[   94.864387] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   94.871640] R13: 00007f335031dd80 R14: 000000000000000a R15: 6d74702f7665642f
[   94.878916] CPU: 0 PID: 4459 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   94.885921] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   94.895267] Call Trace:
[   94.897853]  dump_stack+0x1b9/0x294
[   94.901475]  ? dump_stack_print_info.cold.2+0x52/0x52
[   94.906675]  should_fail.cold.4+0xa/0x1a
[   94.910728]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   94.915816]  ? lock_downgrade+0x8e0/0x8e0
[   94.919942]  ? lock_release+0xa10/0xa10
[   94.923896]  ? kasan_check_read+0x11/0x20
[   94.928063]  ? rcu_note_context_switch+0x710/0x710
[   94.932805] FAULT_INJECTION: forcing a failure.
[   94.932805] name failslab, interval 1, probability 0, space 0, times 0
[   94.932987]  ? debug_check_no_locks_freed+0x310/0x310
[   94.949310]  ? __might_sleep+0x95/0x190
[   94.953276]  ? kasan_check_write+0x14/0x20
[   94.957498]  ? __mutex_lock+0x7d9/0x17f0
[   94.961545]  ? __mutex_lock+0x95d/0x17f0
[   94.965606]  ? n_tty_write+0xc05/0x1180
[   94.969567]  ? debug_mutex_add_waiter+0x220/0x220
[   94.974396]  ? do_raw_spin_unlock+0x9e/0x2e0
[   94.978793]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   94.983361]  ? debug_mutex_wake_waiter+0x620/0x620
[   94.988275]  ? kasan_check_write+0x14/0x20
[   94.992503]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   94.998026]  __should_failslab+0x124/0x180
[   95.002253]  should_failslab+0x9/0x14
[   95.006039]  __kmalloc+0x63/0x760
[   95.009481]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   95.014579]  __tty_buffer_request_room+0x2d2/0x7f0
[   95.019497]  ? flush_to_ldisc+0x560/0x560
[   95.023634]  ? lock_acquire+0x1dc/0x520
[   95.027593]  ? pty_write+0xf9/0x1f0
[   95.031206]  ? do_raw_spin_unlock+0x9e/0x2e0
[   95.035599]  ? lock_release+0xa10/0xa10
[   95.039562]  ? kasan_check_write+0x14/0x20
[   95.043782]  ? do_raw_spin_lock+0xc1/0x200
[   95.048003]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   95.053524]  ? do_raw_spin_lock+0xc1/0x200
[   95.057745]  pty_write+0x12c/0x1f0
[   95.061274]  n_tty_write+0xc41/0x1180
[   95.065062]  ? __check_object_size+0x95/0x5d9
[   95.069545]  ? process_echoes+0x170/0x170
[   95.073678]  ? __init_waitqueue_head+0x140/0x140
[   95.078422]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.083941]  ? _copy_from_user+0xdf/0x150
[   95.088074]  tty_write+0x3f1/0x880
[   95.091615]  ? process_echoes+0x170/0x170
[   95.095750]  do_iter_write+0x491/0x5f0
[   95.099628]  vfs_writev+0x1c7/0x330
[   95.103244]  ? vfs_iter_write+0xb0/0xb0
[   95.107203]  ? wait_for_completion+0x870/0x870
[   95.111772]  ? lock_release+0xa10/0xa10
[   95.115744]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.121265]  ? fsnotify+0x415/0xfc0
[   95.124888]  ? fsnotify+0xfc0/0xfc0
[   95.128503]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.134027]  ? __fdget_pos+0xd6/0x1e0
[   95.137812]  ? __fdget_raw+0x20/0x20
[   95.141513]  ? __sb_end_write+0xac/0xe0
[   95.145483]  do_writev+0x112/0x2f0
[   95.149008]  ? vfs_writev+0x330/0x330
[   95.152795]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   95.157623]  __x64_sys_writev+0x75/0xb0
[   95.161586]  do_syscall_64+0x1b1/0x800
[   95.165461]  ? finish_task_switch+0x1ca/0x840
[   95.169945]  ? syscall_return_slowpath+0x5c0/0x5c0
[   95.174860]  ? syscall_return_slowpath+0x30f/0x5c0
[   95.179775]  ? prepare_exit_to_usermode+0x390/0x390
[   95.184779]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   95.189956]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   95.195137] RIP: 0033:0x445959
[   95.198308] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   95.217512] RSP: 002b:00007f33502fcd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   95.225205] RAX: ffffffffffffffda RBX: 00000000006dbc9c RCX: 0000000000445959
[   95.232460] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 000000000000000b
[   95.239721] RBP: 00000000006dbc98 R08: 0000000000000001 R09: 0000000000000031
[   95.246973] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   95.254236] R13: 00007f33502fcd80 R14: 000000000000000c R15: 6d74702f7665642f
executing program
[   95.261504] CPU: 1 PID: 4460 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   95.268510] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   95.277850] Call Trace:
[   95.280436]  dump_stack+0x1b9/0x294
[   95.284056]  ? dump_stack_print_info.cold.2+0x52/0x52
[   95.289242]  should_fail.cold.4+0xa/0x1a
[   95.293292]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   95.298376]  ? lock_downgrade+0x8e0/0x8e0
[   95.302501]  ? lock_release+0xa10/0xa10
[   95.306454]  ? kasan_check_read+0x11/0x20
[   95.310581]  ? rcu_note_context_switch+0x710/0x710
[   95.315495]  ? debug_check_no_locks_freed+0x310/0x310
[   95.315555] FAULT_INJECTION: forcing a failure.
[   95.315555] name failslab, interval 1, probability 0, space 0, times 0
[   95.320681]  ? __might_sleep+0x95/0x190
[   95.335787]  ? kasan_check_write+0x14/0x20
[   95.340007]  ? __mutex_lock+0x7d9/0x17f0
[   95.344067]  ? __mutex_lock+0x95d/0x17f0
[   95.348117]  ? n_tty_write+0xc05/0x1180
[   95.352080]  ? debug_mutex_add_waiter+0x220/0x220
[   95.356932]  ? do_raw_spin_unlock+0x9e/0x2e0
[   95.361325]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   95.365901]  ? debug_mutex_wake_waiter+0x620/0x620
[   95.370818]  ? kasan_check_write+0x14/0x20
[   95.375074]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.380599]  __should_failslab+0x124/0x180
[   95.384822]  should_failslab+0x9/0x14
[   95.388608]  __kmalloc+0x63/0x760
[   95.392053]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   95.397144]  __tty_buffer_request_room+0x2d2/0x7f0
[   95.402062]  ? flush_to_ldisc+0x560/0x560
[   95.406195]  ? lock_acquire+0x1dc/0x520
[   95.410154]  ? pty_write+0xf9/0x1f0
[   95.413770]  ? do_raw_spin_unlock+0x9e/0x2e0
[   95.418170]  ? lock_release+0xa10/0xa10
[   95.422130]  ? kasan_check_write+0x14/0x20
[   95.426351]  ? do_raw_spin_lock+0xc1/0x200
[   95.430581]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   95.436106]  ? do_raw_spin_lock+0xc1/0x200
[   95.440328]  pty_write+0x12c/0x1f0
[   95.443857]  n_tty_write+0xc41/0x1180
[   95.448221]  ? __check_object_size+0x95/0x5d9
[   95.452715]  ? process_echoes+0x170/0x170
[   95.456847]  ? __init_waitqueue_head+0x140/0x140
[   95.461677]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.467202]  ? _copy_from_user+0xdf/0x150
[   95.471338]  tty_write+0x3f1/0x880
[   95.474865]  ? process_echoes+0x170/0x170
[   95.478997]  do_iter_write+0x491/0x5f0
[   95.482871]  vfs_writev+0x1c7/0x330
[   95.486487]  ? vfs_iter_write+0xb0/0xb0
[   95.490448]  ? wait_for_completion+0x870/0x870
[   95.495017]  ? lock_release+0xa10/0xa10
[   95.498978]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.504501]  ? fsnotify+0x415/0xfc0
[   95.508125]  ? fsnotify+0xfc0/0xfc0
[   95.511744]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.517267]  ? __fdget_pos+0xd6/0x1e0
[   95.521056]  ? __fdget_raw+0x20/0x20
[   95.524754]  ? __sb_end_write+0xac/0xe0
[   95.528721]  do_writev+0x112/0x2f0
[   95.532246]  ? vfs_writev+0x330/0x330
[   95.536043]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   95.540872]  __x64_sys_writev+0x75/0xb0
[   95.544834]  do_syscall_64+0x1b1/0x800
[   95.548723]  ? finish_task_switch+0x1ca/0x840
[   95.553205]  ? syscall_return_slowpath+0x5c0/0x5c0
[   95.558120]  ? syscall_return_slowpath+0x30f/0x5c0
[   95.563047]  ? prepare_exit_to_usermode+0x390/0x390
[   95.568055]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   95.572973]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   95.578156] RIP: 0033:0x445959
[   95.581324] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   95.600532] RSP: 002b:00007f33502dbd78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   95.608231] RAX: ffffffffffffffda RBX: 00000000006dbcb4 RCX: 0000000000445959
executing program
[   95.615499] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 000000000000000d
[   95.622754] RBP: 00000000006dbcb0 R08: 0000000000000001 R09: 0000000000000031
[   95.630012] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   95.637281] R13: 00007f33502dbd80 R14: 000000000000000e R15: 6d74702f7665642f
[   95.644565] CPU: 0 PID: 4461 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   95.651570] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   95.660911] Call Trace:
[   95.663501]  dump_stack+0x1b9/0x294
[   95.667127]  ? dump_stack_print_info.cold.2+0x52/0x52
[   95.672317]  should_fail.cold.4+0xa/0x1a
[   95.676375]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   95.681476]  ? lock_downgrade+0x8e0/0x8e0
[   95.685609]  ? lock_release+0xa10/0xa10
[   95.689564]  ? kasan_check_read+0x11/0x20
[   95.693699]  ? rcu_note_context_switch+0x710/0x710
[   95.698250] FAULT_INJECTION: forcing a failure.
[   95.698250] name failslab, interval 1, probability 0, space 0, times 0
[   95.698624]  ? debug_check_no_locks_freed+0x310/0x310
[   95.714953]  ? __might_sleep+0x95/0x190
[   95.718966]  ? kasan_check_write+0x14/0x20
[   95.723221]  ? __mutex_lock+0x7d9/0x17f0
[   95.727279]  ? __mutex_lock+0x95d/0x17f0
[   95.731348]  ? n_tty_write+0xc05/0x1180
[   95.735307]  ? debug_mutex_add_waiter+0x220/0x220
[   95.740142]  ? do_raw_spin_unlock+0x9e/0x2e0
[   95.744538]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   95.749107]  ? debug_mutex_wake_waiter+0x620/0x620
[   95.754038]  ? kasan_check_write+0x14/0x20
[   95.758265]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.763789]  __should_failslab+0x124/0x180
[   95.768028]  should_failslab+0x9/0x14
[   95.771830]  __kmalloc+0x63/0x760
[   95.775272]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   95.780367]  __tty_buffer_request_room+0x2d2/0x7f0
[   95.785288]  ? flush_to_ldisc+0x560/0x560
[   95.789425]  ? lock_acquire+0x1dc/0x520
[   95.793387]  ? pty_write+0xf9/0x1f0
[   95.797005]  ? do_raw_spin_unlock+0x9e/0x2e0
[   95.801409]  ? lock_release+0xa10/0xa10
[   95.805373]  ? kasan_check_write+0x14/0x20
[   95.809595]  ? do_raw_spin_lock+0xc1/0x200
[   95.813830]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   95.819358]  ? do_raw_spin_lock+0xc1/0x200
[   95.823677]  pty_write+0x12c/0x1f0
[   95.827208]  n_tty_write+0xc41/0x1180
[   95.831000]  ? __check_object_size+0x95/0x5d9
[   95.835495]  ? process_echoes+0x170/0x170
[   95.839631]  ? __init_waitqueue_head+0x140/0x140
[   95.844376]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   95.849897]  ? _copy_from_user+0xdf/0x150
[   95.854033]  tty_write+0x3f1/0x880
[   95.857560]  ? process_echoes+0x170/0x170
[   95.861694]  do_iter_write+0x491/0x5f0
[   95.865569]  vfs_writev+0x1c7/0x330
[   95.869186]  ? vfs_iter_write+0xb0/0xb0
[   95.873152]  ? wait_for_completion+0x870/0x870
[   95.877717]  ? lock_release+0xa10/0xa10
[   95.881681]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.887209]  ? fsnotify+0x415/0xfc0
[   95.890822]  ? fsnotify+0xfc0/0xfc0
[   95.894440]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   95.899966]  ? __fdget_pos+0xd6/0x1e0
[   95.903757]  ? __fdget_raw+0x20/0x20
[   95.907457]  ? __sb_end_write+0xac/0xe0
[   95.911420]  do_writev+0x112/0x2f0
[   95.914955]  ? vfs_writev+0x330/0x330
[   95.918741]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   95.923573]  __x64_sys_writev+0x75/0xb0
[   95.927538]  do_syscall_64+0x1b1/0x800
[   95.931415]  ? finish_task_switch+0x1ca/0x840
[   95.935895]  ? syscall_return_slowpath+0x5c0/0x5c0
[   95.940811]  ? syscall_return_slowpath+0x30f/0x5c0
[   95.945731]  ? prepare_exit_to_usermode+0x390/0x390
[   95.950738]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   95.955572]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   95.960744] RIP: 0033:0x445959
[   95.963913] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   95.983116] RSP: 002b:00007f33502bad78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   95.990813] RAX: ffffffffffffffda RBX: 00000000006dbccc RCX: 0000000000445959
[   95.998071] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 000000000000000f
[   96.005342] RBP: 00000000006dbcc8 R08: 0000000000000001 R09: 0000000000000031
[   96.012594] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
executing program
[   96.019856] R13: 00007f33502bad80 R14: 0000000000000010 R15: 6d74702f7665642f
[   96.027123] CPU: 1 PID: 4462 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   96.034130] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   96.043470] Call Trace:
[   96.046063]  dump_stack+0x1b9/0x294
[   96.049693]  ? dump_stack_print_info.cold.2+0x52/0x52
[   96.054882]  should_fail.cold.4+0xa/0x1a
[   96.058931]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   96.064021]  ? lock_downgrade+0x8e0/0x8e0
[   96.068151]  ? lock_release+0xa10/0xa10
[   96.072148]  ? kasan_check_read+0x11/0x20
[   96.076280]  ? rcu_note_context_switch+0x710/0x710
[   96.080921] FAULT_INJECTION: forcing a failure.
[   96.080921] name failslab, interval 1, probability 0, space 0, times 0
[   96.081205]  ? debug_check_no_locks_freed+0x310/0x310
[   96.097530]  ? __might_sleep+0x95/0x190
[   96.101492]  ? kasan_check_write+0x14/0x20
[   96.105753]  ? __mutex_lock+0x7d9/0x17f0
[   96.109802]  ? __mutex_lock+0x95d/0x17f0
[   96.113851]  ? n_tty_write+0xc05/0x1180
[   96.117809]  ? debug_mutex_add_waiter+0x220/0x220
[   96.122638]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.127047]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   96.131612]  ? debug_mutex_wake_waiter+0x620/0x620
[   96.136524]  ? kasan_check_write+0x14/0x20
[   96.140749]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.146274]  __should_failslab+0x124/0x180
[   96.150501]  should_failslab+0x9/0x14
[   96.154301]  __kmalloc+0x63/0x760
[   96.157741]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   96.162834]  __tty_buffer_request_room+0x2d2/0x7f0
[   96.167753]  ? flush_to_ldisc+0x560/0x560
[   96.171888]  ? lock_acquire+0x1dc/0x520
[   96.175851]  ? pty_write+0xf9/0x1f0
[   96.182163]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.187083]  ? lock_release+0xa10/0xa10
[   96.191047]  ? kasan_check_write+0x14/0x20
[   96.195386]  ? do_raw_spin_lock+0xc1/0x200
[   96.199611]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   96.205137]  ? do_raw_spin_lock+0xc1/0x200
[   96.209359]  pty_write+0x12c/0x1f0
[   96.212891]  n_tty_write+0xc41/0x1180
[   96.216685]  ? __check_object_size+0x95/0x5d9
[   96.221169]  ? process_echoes+0x170/0x170
[   96.225305]  ? __init_waitqueue_head+0x140/0x140
[   96.230086]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.235610]  ? _copy_from_user+0xdf/0x150
[   96.239753]  tty_write+0x3f1/0x880
[   96.243280]  ? process_echoes+0x170/0x170
[   96.247414]  do_iter_write+0x491/0x5f0
[   96.251288]  vfs_writev+0x1c7/0x330
[   96.254904]  ? vfs_iter_write+0xb0/0xb0
[   96.258875]  ? wait_for_completion+0x870/0x870
[   96.263446]  ? lock_release+0xa10/0xa10
[   96.267407]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   96.272931]  ? fsnotify+0x415/0xfc0
[   96.276546]  ? fsnotify+0xfc0/0xfc0
[   96.280161]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   96.285686]  ? __fdget_pos+0xd6/0x1e0
[   96.289472]  ? __fdget_raw+0x20/0x20
[   96.293171]  ? __sb_end_write+0xac/0xe0
[   96.297134]  do_writev+0x112/0x2f0
[   96.300663]  ? vfs_writev+0x330/0x330
[   96.304451]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   96.309278]  __x64_sys_writev+0x75/0xb0
[   96.313237]  do_syscall_64+0x1b1/0x800
[   96.317109]  ? finish_task_switch+0x1ca/0x840
[   96.321597]  ? syscall_return_slowpath+0x5c0/0x5c0
[   96.326512]  ? syscall_return_slowpath+0x30f/0x5c0
[   96.331425]  ? prepare_exit_to_usermode+0x390/0x390
[   96.336439]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   96.341268]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   96.346450] RIP: 0033:0x445959
[   96.349618] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   96.368822] RSP: 002b:00007f3350299d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   96.376514] RAX: ffffffffffffffda RBX: 00000000006dbce4 RCX: 0000000000445959
[   96.383771] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000011
[   96.391026] RBP: 00000000006dbce0 R08: 0000000000000001 R09: 0000000000000031
[   96.398283] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   96.405538] R13: 00007f3350299d80 R14: 0000000000000012 R15: 6d74702f7665642f
[   96.412804] CPU: 0 PID: 4463 Comm: syz-executor589 Not tainted 4.17.0+ #87
executing program
[   96.419810] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   96.429151] Call Trace:
[   96.431736]  dump_stack+0x1b9/0x294
[   96.435356]  ? dump_stack_print_info.cold.2+0x52/0x52
[   96.440544]  should_fail.cold.4+0xa/0x1a
[   96.444594]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   96.449682]  ? lock_downgrade+0x8e0/0x8e0
[   96.453811]  ? lock_release+0xa10/0xa10
[   96.457764]  ? kasan_check_read+0x11/0x20
[   96.461893]  ? rcu_note_context_switch+0x710/0x710
[   96.466395] FAULT_INJECTION: forcing a failure.
[   96.466395] name failslab, interval 1, probability 0, space 0, times 0
[   96.466818]  ? debug_check_no_locks_freed+0x310/0x310
[   96.483147]  ? __might_sleep+0x95/0x190
[   96.487113]  ? kasan_check_write+0x14/0x20
[   96.491333]  ? __mutex_lock+0x7d9/0x17f0
[   96.495379]  ? __mutex_lock+0x95d/0x17f0
[   96.499429]  ? n_tty_write+0xc05/0x1180
[   96.503386]  ? debug_mutex_add_waiter+0x220/0x220
[   96.508216]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.512608]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   96.517173]  ? debug_mutex_wake_waiter+0x620/0x620
[   96.522091]  ? kasan_check_write+0x14/0x20
[   96.526315]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.531836]  __should_failslab+0x124/0x180
[   96.536060]  should_failslab+0x9/0x14
[   96.539847]  __kmalloc+0x63/0x760
[   96.543292]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   96.548382]  __tty_buffer_request_room+0x2d2/0x7f0
[   96.553300]  ? flush_to_ldisc+0x560/0x560
[   96.557433]  ? lock_acquire+0x1dc/0x520
[   96.561393]  ? pty_write+0xf9/0x1f0
[   96.565005]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.569401]  ? lock_release+0xa10/0xa10
[   96.573363]  ? kasan_check_write+0x14/0x20
[   96.577582]  ? do_raw_spin_lock+0xc1/0x200
[   96.581804]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   96.587327]  ? do_raw_spin_lock+0xc1/0x200
[   96.591547]  pty_write+0x12c/0x1f0
[   96.595075]  n_tty_write+0xc41/0x1180
[   96.598865]  ? __check_object_size+0x95/0x5d9
[   96.603348]  ? process_echoes+0x170/0x170
[   96.607482]  ? __init_waitqueue_head+0x140/0x140
[   96.612227]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.618455]  ? _copy_from_user+0xdf/0x150
[   96.622593]  tty_write+0x3f1/0x880
[   96.626124]  ? process_echoes+0x170/0x170
[   96.630263]  do_iter_write+0x491/0x5f0
[   96.634144]  vfs_writev+0x1c7/0x330
[   96.637756]  ? vfs_iter_write+0xb0/0xb0
[   96.641719]  ? wait_for_completion+0x870/0x870
[   96.646375]  ? lock_release+0xa10/0xa10
[   96.650440]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   96.655963]  ? fsnotify+0x415/0xfc0
[   96.659696]  ? fsnotify+0xfc0/0xfc0
[   96.663321]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   96.668843]  ? __fdget_pos+0xd6/0x1e0
[   96.672630]  ? __fdget_raw+0x20/0x20
[   96.676330]  ? __sb_end_write+0xac/0xe0
[   96.680294]  do_writev+0x112/0x2f0
[   96.683818]  ? vfs_writev+0x330/0x330
[   96.687606]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   96.692434]  __x64_sys_writev+0x75/0xb0
[   96.696395]  do_syscall_64+0x1b1/0x800
[   96.700268]  ? syscall_return_slowpath+0x5c0/0x5c0
[   96.705183]  ? syscall_return_slowpath+0x30f/0x5c0
[   96.710109]  ? prepare_exit_to_usermode+0x390/0x390
[   96.715125]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   96.719958]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   96.725139] RIP: 0033:0x445959
[   96.728308] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   96.747510] RSP: 002b:00007f3350278d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   96.755202] RAX: ffffffffffffffda RBX: 00000000006dbcfc RCX: 0000000000445959
[   96.762456] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000013
executing program
[   96.769711] RBP: 00000000006dbcf8 R08: 0000000000000001 R09: 0000000000000031
[   96.776966] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   96.784221] R13: 00007f3350278d80 R14: 0000000000000014 R15: 6d74702f7665642f
[   96.791490] CPU: 1 PID: 4464 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   96.798499] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   96.807841] Call Trace:
[   96.810431]  dump_stack+0x1b9/0x294
[   96.814054]  ? dump_stack_print_info.cold.2+0x52/0x52
[   96.819259]  should_fail.cold.4+0xa/0x1a
[   96.823369]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   96.828454]  ? lock_downgrade+0x8e0/0x8e0
[   96.832583]  ? lock_release+0xa10/0xa10
[   96.836549]  ? kasan_check_read+0x11/0x20
[   96.840698]  ? rcu_note_context_switch+0x710/0x710
[   96.845601] FAULT_INJECTION: forcing a failure.
[   96.845601] name failslab, interval 1, probability 0, space 0, times 0
[   96.845636]  ? debug_check_no_locks_freed+0x310/0x310
[   96.861959]  ? __might_sleep+0x95/0x190
[   96.865920]  ? kasan_check_write+0x14/0x20
[   96.870141]  ? __mutex_lock+0x7d9/0x17f0
[   96.874188]  ? __mutex_lock+0x95d/0x17f0
[   96.878247]  ? n_tty_write+0xc05/0x1180
[   96.882206]  ? debug_mutex_add_waiter+0x220/0x220
[   96.887041]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.891446]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   96.896012]  ? debug_mutex_wake_waiter+0x620/0x620
[   96.900936]  ? kasan_check_write+0x14/0x20
[   96.905159]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.910683]  __should_failslab+0x124/0x180
[   96.914905]  should_failslab+0x9/0x14
[   96.918690]  __kmalloc+0x63/0x760
[   96.922133]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   96.927224]  __tty_buffer_request_room+0x2d2/0x7f0
[   96.932142]  ? flush_to_ldisc+0x560/0x560
[   96.936279]  ? lock_acquire+0x1dc/0x520
[   96.940242]  ? pty_write+0xf9/0x1f0
[   96.943855]  ? do_raw_spin_unlock+0x9e/0x2e0
[   96.948248]  ? lock_release+0xa10/0xa10
[   96.952206]  ? kasan_check_write+0x14/0x20
[   96.956424]  ? do_raw_spin_lock+0xc1/0x200
[   96.960649]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   96.966172]  ? do_raw_spin_lock+0xc1/0x200
[   96.970393]  pty_write+0x12c/0x1f0
[   96.973921]  n_tty_write+0xc41/0x1180
[   96.977710]  ? __check_object_size+0x95/0x5d9
[   96.982192]  ? process_echoes+0x170/0x170
[   96.986327]  ? __init_waitqueue_head+0x140/0x140
[   96.991068]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   96.996623]  ? _copy_from_user+0xdf/0x150
[   97.000757]  tty_write+0x3f1/0x880
[   97.004288]  ? process_echoes+0x170/0x170
[   97.008421]  do_iter_write+0x491/0x5f0
[   97.012297]  vfs_writev+0x1c7/0x330
[   97.015909]  ? vfs_iter_write+0xb0/0xb0
[   97.019871]  ? wait_for_completion+0x870/0x870
[   97.024440]  ? lock_release+0xa10/0xa10
[   97.028401]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.033926]  ? fsnotify+0x415/0xfc0
[   97.037538]  ? fsnotify+0xfc0/0xfc0
[   97.041152]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.046678]  ? __fdget_pos+0xd6/0x1e0
[   97.050462]  ? __fdget_raw+0x20/0x20
[   97.054164]  ? __sb_end_write+0xac/0xe0
[   97.058127]  do_writev+0x112/0x2f0
[   97.061652]  ? vfs_writev+0x330/0x330
[   97.065442]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   97.070272]  __x64_sys_writev+0x75/0xb0
[   97.074233]  do_syscall_64+0x1b1/0x800
[   97.078106]  ? finish_task_switch+0x1ca/0x840
[   97.082591]  ? syscall_return_slowpath+0x5c0/0x5c0
[   97.087511]  ? syscall_return_slowpath+0x30f/0x5c0
[   97.092425]  ? prepare_exit_to_usermode+0x390/0x390
[   97.097434]  ? prepare_exit_to_usermode+0x285/0x390
[   97.102438]  ? perf_trace_sys_enter+0xaf0/0xaf0
[   97.107094]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   97.111923]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   97.117097] RIP: 0033:0x445959
[   97.120266] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   97.139468] RSP: 002b:00007f3350257d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   97.147161] RAX: ffffffffffffffda RBX: 00000000006dbd14 RCX: 0000000000445959
[   97.154413] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000015
[   97.161665] RBP: 00000000006dbd10 R08: 0000000000000001 R09: 0000000000000031
executing program
[   97.168926] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   97.176181] R13: 00007f3350257d80 R14: 0000000000000016 R15: 6d74702f7665642f
[   97.183451] CPU: 0 PID: 4465 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   97.190456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   97.199800] Call Trace:
[   97.202391]  dump_stack+0x1b9/0x294
[   97.206013]  ? dump_stack_print_info.cold.2+0x52/0x52
[   97.211200]  should_fail.cold.4+0xa/0x1a
[   97.215257]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   97.220360]  ? lock_downgrade+0x8e0/0x8e0
[   97.224506]  ? lock_release+0xa10/0xa10
[   97.228476]  ? kasan_check_read+0x11/0x20
[   97.232622]  ? rcu_note_context_switch+0x710/0x710
[   97.237546]  ? debug_check_no_locks_freed+0x310/0x310
[   97.242733]  ? __might_sleep+0x95/0x190
[   97.246704]  ? kasan_check_write+0x14/0x20
[   97.247236] FAULT_INJECTION: forcing a failure.
[   97.247236] name failslab, interval 1, probability 0, space 0, times 0
[   97.250935]  ? __mutex_lock+0x7d9/0x17f0
[   97.266133]  ? __mutex_lock+0x95d/0x17f0
[   97.270183]  ? n_tty_write+0xc05/0x1180
[   97.274144]  ? debug_mutex_add_waiter+0x220/0x220
[   97.278974]  ? do_raw_spin_unlock+0x9e/0x2e0
[   97.283373]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   97.287941]  ? debug_mutex_wake_waiter+0x620/0x620
[   97.292856]  ? kasan_check_write+0x14/0x20
[   97.297087]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   97.302611]  __should_failslab+0x124/0x180
[   97.306837]  should_failslab+0x9/0x14
[   97.310640]  __kmalloc+0x63/0x760
[   97.314081]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   97.319174]  __tty_buffer_request_room+0x2d2/0x7f0
[   97.324096]  ? flush_to_ldisc+0x560/0x560
[   97.328230]  ? lock_acquire+0x1dc/0x520
[   97.332187]  ? pty_write+0xf9/0x1f0
[   97.335802]  ? do_raw_spin_unlock+0x9e/0x2e0
[   97.340196]  ? lock_release+0xa10/0xa10
[   97.344157]  ? kasan_check_write+0x14/0x20
[   97.348377]  ? do_raw_spin_lock+0xc1/0x200
[   97.352601]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   97.358125]  ? do_raw_spin_lock+0xc1/0x200
[   97.362348]  pty_write+0x12c/0x1f0
[   97.365876]  n_tty_write+0xc41/0x1180
[   97.369667]  ? __check_object_size+0x95/0x5d9
[   97.374153]  ? process_echoes+0x170/0x170
[   97.378287]  ? __init_waitqueue_head+0x140/0x140
[   97.383090]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   97.388611]  ? _copy_from_user+0xdf/0x150
[   97.392753]  tty_write+0x3f1/0x880
[   97.396289]  ? process_echoes+0x170/0x170
[   97.400424]  do_iter_write+0x491/0x5f0
[   97.404300]  vfs_writev+0x1c7/0x330
[   97.407912]  ? vfs_iter_write+0xb0/0xb0
[   97.411875]  ? wait_for_completion+0x870/0x870
[   97.416444]  ? lock_release+0xa10/0xa10
[   97.420409]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.425967]  ? fsnotify+0x415/0xfc0
[   97.429579]  ? fsnotify+0xfc0/0xfc0
[   97.433197]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.438751]  ? __fdget_pos+0xd6/0x1e0
[   97.442538]  ? __fdget_raw+0x20/0x20
[   97.446241]  ? __sb_end_write+0xac/0xe0
[   97.450219]  do_writev+0x112/0x2f0
[   97.453748]  ? vfs_writev+0x330/0x330
[   97.457535]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   97.462367]  __x64_sys_writev+0x75/0xb0
[   97.466331]  do_syscall_64+0x1b1/0x800
[   97.470206]  ? finish_task_switch+0x1ca/0x840
[   97.474688]  ? syscall_return_slowpath+0x5c0/0x5c0
[   97.479605]  ? syscall_return_slowpath+0x30f/0x5c0
[   97.484538]  ? prepare_exit_to_usermode+0x390/0x390
[   97.489544]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   97.494375]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   97.499549] RIP: 0033:0x445959
[   97.502718] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   97.522185] RSP: 002b:00007f3350236d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   97.529918] RAX: ffffffffffffffda RBX: 00000000006dbd2c RCX: 0000000000445959
[   97.537176] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000017
[   97.544431] RBP: 00000000006dbd28 R08: 0000000000000001 R09: 0000000000000031
[   97.551693] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   97.558950] R13: 00007f3350236d80 R14: 0000000000000018 R15: 6d74702f7665642f
[   97.566214] CPU: 1 PID: 4466 Comm: syz-executor589 Not tainted 4.17.0+ #87
executing program
[   97.573221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   97.582555] Call Trace:
[   97.585141]  dump_stack+0x1b9/0x294
[   97.588762]  ? dump_stack_print_info.cold.2+0x52/0x52
[   97.593949]  should_fail.cold.4+0xa/0x1a
[   97.598007]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   97.603102]  ? lock_downgrade+0x8e0/0x8e0
[   97.607230]  ? lock_release+0xa10/0xa10
[   97.611185]  ? kasan_check_read+0x11/0x20
[   97.615313]  ? rcu_note_context_switch+0x710/0x710
[   97.620225]  ? debug_check_no_locks_freed+0x310/0x310
[   97.620407] FAULT_INJECTION: forcing a failure.
[   97.620407] name failslab, interval 1, probability 0, space 0, times 0
[   97.625415]  ? __might_sleep+0x95/0x190
[   97.640526]  ? kasan_check_write+0x14/0x20
[   97.644749]  ? __mutex_lock+0x7d9/0x17f0
[   97.648795]  ? __mutex_lock+0x95d/0x17f0
[   97.652845]  ? n_tty_write+0xc05/0x1180
[   97.656803]  ? debug_mutex_add_waiter+0x220/0x220
[   97.661633]  ? do_raw_spin_unlock+0x9e/0x2e0
[   97.666026]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   97.670591]  ? debug_mutex_wake_waiter+0x620/0x620
[   97.675508]  ? kasan_check_write+0x14/0x20
[   97.679730]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   97.685251]  __should_failslab+0x124/0x180
[   97.689473]  should_failslab+0x9/0x14
[   97.694182]  __kmalloc+0x63/0x760
[   97.697635]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   97.702727]  __tty_buffer_request_room+0x2d2/0x7f0
[   97.707641]  ? flush_to_ldisc+0x560/0x560
[   97.711774]  ? lock_acquire+0x1dc/0x520
[   97.715734]  ? pty_write+0xf9/0x1f0
[   97.719348]  ? do_raw_spin_unlock+0x9e/0x2e0
[   97.723740]  ? lock_release+0xa10/0xa10
[   97.727701]  ? kasan_check_write+0x14/0x20
[   97.731919]  ? do_raw_spin_lock+0xc1/0x200
[   97.736143]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   97.741666]  ? do_raw_spin_lock+0xc1/0x200
[   97.745890]  pty_write+0x12c/0x1f0
[   97.749417]  n_tty_write+0xc41/0x1180
[   97.753205]  ? __check_object_size+0x95/0x5d9
[   97.757691]  ? process_echoes+0x170/0x170
[   97.761829]  ? __init_waitqueue_head+0x140/0x140
[   97.766578]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   97.772102]  ? _copy_from_user+0xdf/0x150
[   97.776239]  tty_write+0x3f1/0x880
[   97.779768]  ? process_echoes+0x170/0x170
[   97.783898]  do_iter_write+0x491/0x5f0
[   97.787771]  vfs_writev+0x1c7/0x330
[   97.791391]  ? vfs_iter_write+0xb0/0xb0
[   97.795351]  ? wait_for_completion+0x870/0x870
[   97.799918]  ? lock_release+0xa10/0xa10
[   97.803877]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.809398]  ? fsnotify+0x415/0xfc0
[   97.813009]  ? fsnotify+0xfc0/0xfc0
[   97.816624]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   97.822146]  ? __fdget_pos+0xd6/0x1e0
[   97.825931]  ? __fdget_raw+0x20/0x20
[   97.829629]  ? __sb_end_write+0xac/0xe0
[   97.833588]  do_writev+0x112/0x2f0
[   97.837114]  ? vfs_writev+0x330/0x330
[   97.840902]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   97.845732]  __x64_sys_writev+0x75/0xb0
[   97.849692]  do_syscall_64+0x1b1/0x800
[   97.853572]  ? finish_task_switch+0x1ca/0x840
[   97.858053]  ? syscall_return_slowpath+0x5c0/0x5c0
[   97.862978]  ? syscall_return_slowpath+0x30f/0x5c0
[   97.867892]  ? prepare_exit_to_usermode+0x390/0x390
[   97.872896]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   97.877727]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   97.882899] RIP: 0033:0x445959
[   97.886069] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   97.905274] RSP: 002b:00007f3350215d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   97.912966] RAX: ffffffffffffffda RBX: 00000000006dbd44 RCX: 0000000000445959
[   97.920219] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 0000000000000019
executing program
[   97.927471] RBP: 00000000006dbd40 R08: 0000000000000001 R09: 0000000000000031
[   97.934722] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   97.941980] R13: 00007f3350215d80 R14: 000000000000001a R15: 6d74702f7665642f
[   97.949248] CPU: 0 PID: 4467 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   97.956251] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   97.965590] Call Trace:
[   97.968174]  dump_stack+0x1b9/0x294
[   97.971798]  ? dump_stack_print_info.cold.2+0x52/0x52
[   97.976983]  should_fail.cold.4+0xa/0x1a
[   97.981039]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   97.986134]  ? lock_downgrade+0x8e0/0x8e0
[   97.990261]  ? lock_release+0xa10/0xa10
[   97.994212]  ? kasan_check_read+0x11/0x20
[   97.998340]  ? rcu_note_context_switch+0x710/0x710
[   98.002646] FAULT_INJECTION: forcing a failure.
[   98.002646] name failslab, interval 1, probability 0, space 0, times 0
[   98.003261]  ? debug_check_no_locks_freed+0x310/0x310
[   98.019590]  ? __might_sleep+0x95/0x190
[   98.023550]  ? kasan_check_write+0x14/0x20
[   98.027774]  ? __mutex_lock+0x7d9/0x17f0
[   98.031868]  ? __mutex_lock+0x95d/0x17f0
[   98.035921]  ? n_tty_write+0xc05/0x1180
[   98.039879]  ? debug_mutex_add_waiter+0x220/0x220
[   98.044723]  ? do_raw_spin_unlock+0x9e/0x2e0
[   98.049159]  ? do_raw_spin_trylock+0x1b0/0x1b0
[   98.053728]  ? debug_mutex_wake_waiter+0x620/0x620
[   98.058645]  ? kasan_check_write+0x14/0x20
[   98.062872]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   98.068429]  __should_failslab+0x124/0x180
[   98.072674]  should_failslab+0x9/0x14
[   98.076462]  __kmalloc+0x63/0x760
[   98.079905]  ? __tty_buffer_request_room+0x2d2/0x7f0
[   98.084995]  __tty_buffer_request_room+0x2d2/0x7f0
[   98.089914]  ? flush_to_ldisc+0x560/0x560
[   98.094054]  ? lock_acquire+0x1dc/0x520
[   98.098012]  ? pty_write+0xf9/0x1f0
[   98.101627]  ? do_raw_spin_unlock+0x9e/0x2e0
[   98.106025]  ? lock_release+0xa10/0xa10
[   98.109990]  ? kasan_check_write+0x14/0x20
[   98.114209]  ? do_raw_spin_lock+0xc1/0x200
[   98.120431]  tty_insert_flip_string_fixed_flag+0x8d/0x1f0
[   98.125957]  ? do_raw_spin_lock+0xc1/0x200
[   98.130181]  pty_write+0x12c/0x1f0
[   98.134411]  n_tty_write+0xc41/0x1180
[   98.138210]  ? __check_object_size+0x95/0x5d9
[   98.142700]  ? process_echoes+0x170/0x170
[   98.146838]  ? __init_waitqueue_head+0x140/0x140
[   98.151586]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   98.157111]  ? _copy_from_user+0xdf/0x150
[   98.161252]  tty_write+0x3f1/0x880
[   98.164784]  ? process_echoes+0x170/0x170
[   98.168940]  do_iter_write+0x491/0x5f0
[   98.172833]  vfs_writev+0x1c7/0x330
[   98.176447]  ? vfs_iter_write+0xb0/0xb0
[   98.180426]  ? wait_for_completion+0x870/0x870
[   98.185014]  ? lock_release+0xa10/0xa10
[   98.189007]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   98.194539]  ? fsnotify+0x415/0xfc0
[   98.198157]  ? fsnotify+0xfc0/0xfc0
[   98.201779]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   98.207573]  ? __fdget_pos+0xd6/0x1e0
[   98.211365]  ? __fdget_raw+0x20/0x20
[   98.215073]  ? __sb_end_write+0xac/0xe0
[   98.219041]  do_writev+0x112/0x2f0
[   98.222656]  ? vfs_writev+0x330/0x330
[   98.226448]  ? syscall_slow_exit_work+0x4f0/0x4f0
[   98.231282]  __x64_sys_writev+0x75/0xb0
[   98.235246]  do_syscall_64+0x1b1/0x800
[   98.240039]  ? syscall_return_slowpath+0x5c0/0x5c0
[   98.244976]  ? syscall_return_slowpath+0x30f/0x5c0
[   98.249902]  ? prepare_exit_to_usermode+0x390/0x390
[   98.254914]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   98.259753]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   98.264947] RIP: 0033:0x445959
[   98.268124] Code: e8 9c bc 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   98.287337] RSP: 002b:00007f33501f4d78 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[   98.295061] RAX: ffffffffffffffda RBX: 00000000006dbd5c RCX: 0000000000445959
[   98.302332] RDX: 0000000000000001 RSI: 0000000020000600 RDI: 000000000000001b
[   98.309588] RBP: 00000000006dbd58 R08: 0000000000000001 R09: 0000000000000031
[   98.316845] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
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[   98.324104] R13: 00007f33501f4d80 R14: 000000000000001c R15: 6d74702f7665642f
[   98.331377] CPU: 1 PID: 4468 Comm: syz-executor589 Not tainted 4.17.0+ #87
[   98.338402] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   98.347743] Call Trace:
[   98.350353]  dump_stack+0x1b9/0x294
[   98.353981]  ? dump_stack_print_info.cold.2+0x52/0x52
[   98.359172]  should_fail.cold.4+0xa/0x1a
[   98.363235]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   98.368346]  ? lock_downgrade+0x8e0/0x8e0
[   98.372474]  ? lock_release+0xa10/0xa10
[   98.376428]  ? kasan_check_read+0x11/0x20
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