[[0;32m OK [0m] Started getty on tty2-tty6 if dbus and logind are not available.
[[0;32m OK [0m] Found device /dev/ttyS0.
[[0;32m OK [0m] Started Serial Getty on ttyS0.
[[0;32m OK [0m] Started Getty on tty6.
[[0;32m OK [0m] Started Getty on tty5.
[[0;32m OK [0m] Started Getty on tty4.
[[0;32m OK [0m] Started Getty on tty3.
[[0;32m OK [0m] Started Getty on tty2.
[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Started OpenBSD Secure Shell server.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts.
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syzkaller login: [ 29.965862] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 29.974419] in_atomic(): 1, irqs_disabled(): 1, pid: 8073, name: syz-executor914
[ 29.981951] 3 locks held by syz-executor914/8073:
[ 29.986767] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 29.995712] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 30.005594] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 30.014084] irq event stamp: 954
[ 30.017429] hardirqs last enabled at (953): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 30.025808] hardirqs last disabled at (954): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 30.034535] softirqs last enabled at (778): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff
[ 30.042915] softirqs last disabled at (755): [<ffffffff81320c83>] irq_exit+0x193/0x240
[ 30.050942] Preemption disabled at:
[ 30.050947] [< (null)>] (null)
[ 30.059364] CPU: 1 PID: 8073 Comm: syz-executor914 Not tainted 4.14.231-syzkaller #0
[ 30.067230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 30.076575] Call Trace:
[ 30.079170] dump_stack+0x1b2/0x281
[ 30.082778] ___might_sleep.cold+0x235/0x250
[ 30.087167] do_con_write+0xd0/0x19b0
[ 30.090965] ? resched_curr+0xc7/0x360
[ 30.094850] ? n_hdlc_buf_get+0x194/0x220
[ 30.098983] ? lock_acquire+0x170/0x3f0
[ 30.102937] ? lock_downgrade+0x740/0x740
[ 30.107061] ? do_con_trol+0x51e0/0x51e0
[ 30.111103] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 30.116183] con_write+0x21/0xa0
[ 30.119525] ? con_put_char+0xa0/0xa0
[ 30.123351] n_hdlc_send_frames+0x241/0x410
[ 30.127653] n_hdlc_tty_wakeup+0x95/0xb0
[ 30.131701] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 30.135914] tty_wakeup+0xc3/0xf0
[ 30.139346] ? insert_char+0x280/0x280
[ 30.143220] __start_tty+0x10b/0x140
[ 30.146913] n_tty_ioctl_helper+0x2f8/0x350
[ 30.151258] n_hdlc_tty_ioctl+0xd4/0x300
[ 30.155296] tty_ioctl+0x5af/0x13c0
[ 30.158915] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 30.163140] ? tty_fasync+0x2c0/0x2c0
[ 30.166923] ? lock_acquire+0x170/0x3f0
[ 30.170895] ? lock_downgrade+0x740/0x740
[ 30.175025] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 30.180123] ? debug_check_no_obj_freed+0x2c0/0x680
[ 30.185131] ? tty_fasync+0x2c0/0x2c0
[ 30.188914] do_vfs_ioctl+0x75a/0xff0
[ 30.192712] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 30.198140] ? ioctl_preallocate+0x1a0/0x1a0
[ 30.202549] ? kmem_cache_free+0x23a/0x2b0
[ 30.206781] ? putname+0xcd/0x110
[ 30.210272] ? do_sys_open+0x208/0x410
[ 30.214156] ? filp_open+0x60/0x60
[ 30.217743] ? security_file_ioctl+0x83/0xb0
[ 30.222133] SyS_ioctl+0x7f/0xb0
[ 30.225478] ? do_vfs_ioctl+0xff0/0xff0
[ 30.229431] do_syscall_64+0x1d5/0x640
[ 30.233301] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 30.238515] RIP: 0033:0x440009
[ 30.241684] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 30.249368] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 30.256620] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 30.263870] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 30.271153] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000074db
[ 30.278422] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 31.367572] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 31.375985] in_atomic(): 1, irqs_disabled(): 1, pid: 8235, name: syz-executor914
[ 31.383534] 3 locks held by syz-executor914/8235:
[ 31.388364] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 31.397296] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 31.407166] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 31.415691] irq event stamp: 788
[ 31.419057] hardirqs last enabled at (787): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 31.427442] hardirqs last disabled at (788): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 31.436178] softirqs last enabled at (714): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff
[ 31.444559] softirqs last disabled at (345): [<ffffffff81320c83>] irq_exit+0x193/0x240
[ 31.452587] Preemption disabled at:
[ 31.452592] [< (null)>] (null)
[ 31.461019] CPU: 1 PID: 8235 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 31.470135] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 31.479489] Call Trace:
[ 31.482065] dump_stack+0x1b2/0x281
[ 31.485696] ___might_sleep.cold+0x235/0x250
[ 31.490103] do_con_write+0xd0/0x19b0
[ 31.493883] ? update_curr+0x28d/0x670
[ 31.497775] ? n_hdlc_buf_get+0x194/0x220
[ 31.501920] ? lock_acquire+0x170/0x3f0
[ 31.505881] ? lock_downgrade+0x740/0x740
[ 31.510024] ? do_con_trol+0x51e0/0x51e0
[ 31.514097] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 31.519178] con_write+0x21/0xa0
[ 31.522536] ? con_put_char+0xa0/0xa0
[ 31.526332] n_hdlc_send_frames+0x241/0x410
[ 31.530636] n_hdlc_tty_wakeup+0x95/0xb0
[ 31.534697] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 31.538962] tty_wakeup+0xc3/0xf0
[ 31.542394] ? insert_char+0x280/0x280
[ 31.546283] __start_tty+0x10b/0x140
[ 31.549974] n_tty_ioctl_helper+0x2f8/0x350
[ 31.554273] n_hdlc_tty_ioctl+0xd4/0x300
[ 31.558346] tty_ioctl+0x5af/0x13c0
[ 31.561970] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 31.566186] ? tty_fasync+0x2c0/0x2c0
[ 31.569964] ? lock_acquire+0x170/0x3f0
[ 31.573915] ? lock_downgrade+0x740/0x740
[ 31.578047] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 31.583156] ? debug_check_no_obj_freed+0x2c0/0x680
[ 31.588192] ? tty_fasync+0x2c0/0x2c0
[ 31.591982] do_vfs_ioctl+0x75a/0xff0
[ 31.595781] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 31.601228] ? ioctl_preallocate+0x1a0/0x1a0
[ 31.605651] ? kmem_cache_free+0x23a/0x2b0
[ 31.609863] ? putname+0xcd/0x110
[ 31.613294] ? do_sys_open+0x208/0x410
[ 31.617167] ? filp_open+0x60/0x60
[ 31.620707] ? security_file_ioctl+0x83/0xb0
[ 31.625091] SyS_ioctl+0x7f/0xb0
[ 31.628437] ? do_vfs_ioctl+0xff0/0xff0
[ 31.632390] do_syscall_64+0x1d5/0x640
[ 31.636256] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 31.641422] RIP: 0033:0x440009
[ 31.644603] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 31.652312] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 31.659560] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 31.666821] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 31.674069] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000007a59
[ 31.681316] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 34.169098] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 34.177503] in_atomic(): 1, irqs_disabled(): 1, pid: 8613, name: syz-executor914
[ 34.185010] 3 locks held by syz-executor914/8613:
[ 34.189932] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 34.198840] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 34.208700] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 34.217175] irq event stamp: 410
[ 34.220536] hardirqs last enabled at (409): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 34.228914] hardirqs last disabled at (410): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 34.237655] softirqs last enabled at (0): [<ffffffff81303b20>] copy_process.part.0+0x12d0/0x71c0
[ 34.246643] softirqs last disabled at (0): [< (null)>] (null)
[ 34.254151] Preemption disabled at:
[ 34.254155] [< (null)>] (null)
[ 34.262609] CPU: 1 PID: 8613 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 34.271681] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 34.281009] Call Trace:
[ 34.283595] dump_stack+0x1b2/0x281
[ 34.287220] ___might_sleep.cold+0x235/0x250
[ 34.291607] do_con_write+0xd0/0x19b0
[ 34.295403] ? resched_curr+0xc7/0x360
[ 34.299265] ? n_hdlc_buf_get+0x194/0x220
[ 34.303391] ? lock_acquire+0x170/0x3f0
[ 34.307341] ? lock_downgrade+0x740/0x740
[ 34.311469] ? do_con_trol+0x51e0/0x51e0
[ 34.315514] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 34.320594] con_write+0x21/0xa0
[ 34.323953] ? con_put_char+0xa0/0xa0
[ 34.327729] n_hdlc_send_frames+0x241/0x410
[ 34.332030] n_hdlc_tty_wakeup+0x95/0xb0
[ 34.336082] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 34.340291] tty_wakeup+0xc3/0xf0
[ 34.343726] ? insert_char+0x280/0x280
[ 34.347593] __start_tty+0x10b/0x140
[ 34.351284] n_tty_ioctl_helper+0x2f8/0x350
[ 34.355684] n_hdlc_tty_ioctl+0xd4/0x300
[ 34.359724] tty_ioctl+0x5af/0x13c0
[ 34.363343] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 34.367578] ? tty_fasync+0x2c0/0x2c0
[ 34.371353] ? lock_acquire+0x170/0x3f0
[ 34.375315] ? lock_downgrade+0x740/0x740
[ 34.379451] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 34.384540] ? debug_check_no_obj_freed+0x2c0/0x680
[ 34.389531] ? tty_fasync+0x2c0/0x2c0
[ 34.393320] do_vfs_ioctl+0x75a/0xff0
[ 34.397113] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 34.402549] ? ioctl_preallocate+0x1a0/0x1a0
[ 34.406934] ? kmem_cache_free+0x23a/0x2b0
[ 34.411145] ? putname+0xcd/0x110
[ 34.414573] ? do_sys_open+0x208/0x410
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[ 34.418441] ? filp_open+0x60/0x60
[ 34.421972] ? security_file_ioctl+0x83/0xb0
[ 34.426369] SyS_ioctl+0x7f/0xb0
[ 34.429709] ? do_vfs_ioctl+0xff0/0xff0
[ 34.433682] do_syscall_64+0x1d5/0x640
[ 34.437564] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 34.442727] RIP: 0033:0x440009
[ 34.445906] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 34.453600] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 34.460859] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 34.468110] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 34.475369] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000008559
[ 34.482613] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 35.367831] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 35.376268] in_atomic(): 1, irqs_disabled(): 1, pid: 8741, name: syz-executor914
[ 35.383776] 3 locks held by syz-executor914/8741:
[ 35.388590] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 35.397538] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 35.407400] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 35.415890] irq event stamp: 414
[ 35.419243] hardirqs last enabled at (413): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 35.427620] hardirqs last disabled at (414): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 35.436346] softirqs last enabled at (0): [<ffffffff81303b20>] copy_process.part.0+0x12d0/0x71c0
[ 35.445327] softirqs last disabled at (0): [< (null)>] (null)
[ 35.452829] Preemption disabled at:
[ 35.452833] [< (null)>] (null)
[ 35.461244] CPU: 0 PID: 8741 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 35.470323] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 35.479649] Call Trace:
[ 35.482216] dump_stack+0x1b2/0x281
[ 35.485851] ___might_sleep.cold+0x235/0x250
[ 35.490250] do_con_write+0xd0/0x19b0
[ 35.494029] ? resched_curr+0xc7/0x360
[ 35.497894] ? n_hdlc_buf_get+0x194/0x220
[ 35.502135] ? lock_acquire+0x170/0x3f0
[ 35.506100] ? lock_downgrade+0x740/0x740
[ 35.510239] ? do_con_trol+0x51e0/0x51e0
[ 35.514277] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 35.519356] con_write+0x21/0xa0
[ 35.522697] ? con_put_char+0xa0/0xa0
[ 35.526470] n_hdlc_send_frames+0x241/0x410
[ 35.530780] n_hdlc_tty_wakeup+0x95/0xb0
[ 35.534814] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 35.539037] tty_wakeup+0xc3/0xf0
[ 35.542482] ? insert_char+0x280/0x280
[ 35.546344] __start_tty+0x10b/0x140
[ 35.550032] n_tty_ioctl_helper+0x2f8/0x350
[ 35.554328] n_hdlc_tty_ioctl+0xd4/0x300
[ 35.558364] tty_ioctl+0x5af/0x13c0
[ 35.561966] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 35.566176] ? tty_fasync+0x2c0/0x2c0
[ 35.569949] ? lock_acquire+0x170/0x3f0
[ 35.573913] ? lock_downgrade+0x740/0x740
[ 35.578040] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 35.583118] ? debug_check_no_obj_freed+0x2c0/0x680
[ 35.588109] ? tty_fasync+0x2c0/0x2c0
[ 35.591883] do_vfs_ioctl+0x75a/0xff0
[ 35.595660] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 35.601110] ? ioctl_preallocate+0x1a0/0x1a0
[ 35.605496] ? kmem_cache_free+0x23a/0x2b0
[ 35.609707] ? putname+0xcd/0x110
[ 35.613135] ? do_sys_open+0x208/0x410
[ 35.617013] ? filp_open+0x60/0x60
[ 35.620530] ? security_file_ioctl+0x83/0xb0
[ 35.624912] SyS_ioctl+0x7f/0xb0
[ 35.628253] ? do_vfs_ioctl+0xff0/0xff0
[ 35.632204] do_syscall_64+0x1d5/0x640
[ 35.636084] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 35.641248] RIP: 0033:0x440009
[ 35.644427] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 35.652111] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 35.659356] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 35.666598] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 35.673869] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000089dd
[ 35.681140] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 36.797054] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 36.805466] in_atomic(): 1, irqs_disabled(): 1, pid: 8906, name: syz-executor914
[ 36.812975] 3 locks held by syz-executor914/8906:
[ 36.817788] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 36.826700] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 36.836578] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 36.845050] irq event stamp: 592
[ 36.848393] hardirqs last enabled at (591): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 36.856785] hardirqs last disabled at (592): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 36.865508] softirqs last enabled at (554): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff
[ 36.873885] softirqs last disabled at (545): [<ffffffff81320c83>] irq_exit+0x193/0x240
[ 36.881924] Preemption disabled at:
[ 36.881928] [< (null)>] (null)
[ 36.890353] CPU: 1 PID: 8906 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 36.899440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 36.908782] Call Trace:
[ 36.911369] dump_stack+0x1b2/0x281
[ 36.915006] ___might_sleep.cold+0x235/0x250
[ 36.919512] do_con_write+0xd0/0x19b0
[ 36.923343] ? resched_curr+0xc7/0x360
[ 36.927220] ? n_hdlc_buf_get+0x194/0x220
[ 36.931386] ? lock_acquire+0x170/0x3f0
[ 36.935351] ? lock_downgrade+0x740/0x740
[ 36.939493] ? do_con_trol+0x51e0/0x51e0
[ 36.943553] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 36.948695] con_write+0x21/0xa0
[ 36.952040] ? con_put_char+0xa0/0xa0
[ 36.955819] n_hdlc_send_frames+0x241/0x410
[ 36.960260] n_hdlc_tty_wakeup+0x95/0xb0
[ 36.964317] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 36.968532] tty_wakeup+0xc3/0xf0
[ 36.971965] ? insert_char+0x280/0x280
[ 36.975830] __start_tty+0x10b/0x140
[ 36.979526] n_tty_ioctl_helper+0x2f8/0x350
[ 36.983842] n_hdlc_tty_ioctl+0xd4/0x300
[ 36.987883] tty_ioctl+0x5af/0x13c0
[ 36.991488] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 36.995697] ? tty_fasync+0x2c0/0x2c0
[ 36.999489] ? lock_acquire+0x170/0x3f0
[ 37.003454] ? lock_downgrade+0x740/0x740
[ 37.007595] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 37.012674] ? debug_check_no_obj_freed+0x2c0/0x680
[ 37.017698] ? tty_fasync+0x2c0/0x2c0
[ 37.021475] do_vfs_ioctl+0x75a/0xff0
[ 37.025268] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 37.030694] ? ioctl_preallocate+0x1a0/0x1a0
[ 37.035092] ? kmem_cache_free+0x23a/0x2b0
[ 37.039302] ? putname+0xcd/0x110
[ 37.042743] ? do_sys_open+0x208/0x410
[ 37.046604] ? filp_open+0x60/0x60
[ 37.050133] ? security_file_ioctl+0x83/0xb0
[ 37.054514] SyS_ioctl+0x7f/0xb0
[ 37.057871] ? do_vfs_ioctl+0xff0/0xff0
[ 37.061822] do_syscall_64+0x1d5/0x640
[ 37.065698] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 37.070888] RIP: 0033:0x440009
[ 37.074051] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 37.081761] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 37.089022] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 37.096265] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 37.103511] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000008f85
[ 37.110796] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 38.561482] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 38.570048] in_atomic(): 1, irqs_disabled(): 1, pid: 9121, name: syz-executor914
[ 38.577554] 3 locks held by syz-executor914/9121:
[ 38.582383] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 38.591310] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 38.601242] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 38.609716] irq event stamp: 404
[ 38.613059] hardirqs last enabled at (403): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 38.621437] hardirqs last disabled at (404): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 38.630175] softirqs last enabled at (0): [<ffffffff81303b20>] copy_process.part.0+0x12d0/0x71c0
[ 38.639161] softirqs last disabled at (0): [< (null)>] (null)
[ 38.646665] Preemption disabled at:
[ 38.646669] [< (null)>] (null)
[ 38.655100] CPU: 0 PID: 9121 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 38.664165] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 38.673506] Call Trace:
[ 38.676075] dump_stack+0x1b2/0x281
[ 38.679679] ___might_sleep.cold+0x235/0x250
[ 38.684065] do_con_write+0xd0/0x19b0
[ 38.687844] ? resched_curr+0xc7/0x360
[ 38.691706] ? n_hdlc_buf_get+0x194/0x220
[ 38.695834] ? lock_acquire+0x170/0x3f0
[ 38.699800] ? lock_downgrade+0x740/0x740
[ 38.704024] ? do_con_trol+0x51e0/0x51e0
[ 38.708065] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 38.713142] con_write+0x21/0xa0
[ 38.716511] ? con_put_char+0xa0/0xa0
[ 38.720288] n_hdlc_send_frames+0x241/0x410
[ 38.724602] n_hdlc_tty_wakeup+0x95/0xb0
[ 38.728723] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 38.732982] tty_wakeup+0xc3/0xf0
[ 38.736452] ? insert_char+0x280/0x280
[ 38.740315] __start_tty+0x10b/0x140
[ 38.744031] n_tty_ioctl_helper+0x2f8/0x350
[ 38.748330] n_hdlc_tty_ioctl+0xd4/0x300
[ 38.752412] tty_ioctl+0x5af/0x13c0
[ 38.756020] ? n_hdlc_tty_wakeup+0xb0/0xb0
[ 38.760228] ? tty_fasync+0x2c0/0x2c0
[ 38.764005] ? lock_acquire+0x170/0x3f0
[ 38.767957] ? lock_downgrade+0x740/0x740
[ 38.772084] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 38.777162] ? debug_check_no_obj_freed+0x2c0/0x680
[ 38.782178] ? tty_fasync+0x2c0/0x2c0
[ 38.786063] do_vfs_ioctl+0x75a/0xff0
[ 38.789857] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 38.795280] ? ioctl_preallocate+0x1a0/0x1a0
[ 38.799670] ? kmem_cache_free+0x23a/0x2b0
[ 38.803883] ? putname+0xcd/0x110
[ 38.807311] ? do_sys_open+0x208/0x410
[ 38.811189] ? filp_open+0x60/0x60
[ 38.814707] ? security_file_ioctl+0x83/0xb0
[ 38.819089] SyS_ioctl+0x7f/0xb0
[ 38.822452] ? do_vfs_ioctl+0xff0/0xff0
[ 38.826404] do_syscall_64+0x1d5/0x640
[ 38.830271] entry_SYSCALL_64_after_hwframe+0x46/0xbb
[ 38.835437] RIP: 0033:0x440009
[ 38.838602] RSP: 002b:00007ffc6123e598 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 38.846285] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000440009
[ 38.853531] RDX: 0000000000000001 RSI: 000000000000540a RDI: 0000000000000005
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[ 38.860803] RBP: 0000000000000000 R08: 000000000000000d R09: 0000000000000001
[ 38.868074] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000009669
[ 38.875317] R13: 00007ffc6123e5ac R14: 00007ffc6123e5c0 R15: 00007ffc6123e5b0
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[ 39.804440] BUG: sleeping function called from invalid context at drivers/tty/vt/vt.c:2228
[ 39.812876] in_atomic(): 1, irqs_disabled(): 1, pid: 9254, name: syz-executor914
[ 39.820429] 3 locks held by syz-executor914/9254:
[ 39.825262] #0: (&tty->ldisc_sem){++++}, at: [<ffffffff83549482>] tty_ldisc_ref_wait+0x22/0x80
[ 39.834175] #1: (&(&tty->flow_lock)->rlock){....}, at: [<ffffffff83548a00>] n_tty_ioctl_helper+0xa0/0x350
[ 39.844066] #2: (&tty->ldisc_sem){++++}, at: [<ffffffff8354953b>] tty_ldisc_ref+0x1b/0x80
[ 39.852568] irq event stamp: 468
[ 39.855927] hardirqs last enabled at (467): [<ffffffff81004cbc>] do_syscall_64+0x4c/0x640
[ 39.864305] hardirqs last disabled at (468): [<ffffffff8722ab25>] _raw_spin_lock_irq+0x35/0x80
[ 39.873031] softirqs last enabled at (210): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff
[ 39.881410] softirqs last disabled at (185): [<ffffffff81320c83>] irq_exit+0x193/0x240
[ 39.889436] Preemption disabled at:
[ 39.889440] [< (null)>] (null)
[ 39.897868] CPU: 1 PID: 9254 Comm: syz-executor914 Tainted: G W 4.14.231-syzkaller #0
[ 39.906939] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 39.916278] Call Trace:
[ 39.918852] dump_stack+0x1b2/0x281
[ 39.922462] ___might_sleep.cold+0x235/0x250
[ 39.926872] do_con_write+0xd0/0x19b0
[ 39.930662] ? resched_curr+0xc7/0x360
[ 39.934535] ? n_hdlc_buf_get+0x194/0x220
[ 39.938675] ? lock_acquire+0x170/0x3f0
[ 39.942632] ? lock_downgrade+0x740/0x740
[ 39.946767] ? do_con_trol+0x51e0/0x51e0
[ 39.950810] ? _raw_spin_unlock_irqrestore+0x66/0xe0
[ 39.955892] con_write+0x21/0xa0
[ 39.959243] ? con_put_char+0xa0/0xa0
[ 39.963023] n_hdlc_send_frames+0x241/0x410
[ 39.967329] n_hdlc_tty_wakeup+0x95/0xb0
[ 39.971369] ? n_hdlc_tty_open+0x4d0/0x4d0
[ 39.975582] tty_wakeup+0xc3/0xf0
[ 39.979022] ? insert_char+0x280/0x280
[ 39.982888] __start_tty+0x10b/0x140
[ 39.986596] n_tty_ioctl_helper+0x2f8/0x350
[ 39.990895] n_hdlc_tty_ioctl+0xd4/0x300
[ 39.994968] tty_ioctl+0x5af/0x13c0
[ 39.998601] ? n_hdlc_tty_wakeup+0xb0/0xb0