INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes [ 369.398853] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts. [ 375.111275] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 375.200588] audit: type=1400 audit(1542436413.572:7): avc: denied { map } for pid=1831 comm="syz-executor556" path="/root/syz-executor556678324" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program INIT: Id "3" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes INIT: Id "4" respawning too fast: disabled for 5 minutes INIT: Id "5" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes INIT: Id "6" respawning too fast: disabled for 5 minutes executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 571.350091] INFO: task syz-executor556:2016 blocked for more than 140 seconds. [ 571.364160] Not tainted 4.14.81+ #6 [ 571.381755] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 571.413903] syz-executor556 D29656 2016 1 0x00000000 [ 571.438353] Call Trace: [ 571.446547] ? __schedule+0x729/0x1ed0 [ 571.459330] ? __sched_text_start+0x8/0x8 [ 571.472450] ? trace_hardirqs_on+0x10/0x10 [ 571.485590] ? trace_hardirqs_on+0x10/0x10 [ 571.498736] schedule+0x7f/0x1b0 [ 571.511079] schedule_timeout+0x710/0xe60 [ 571.524097] ? usleep_range+0x130/0x130 [ 571.536952] ? __ldsem_down_read_nested+0x2ad/0x5b0 [ 571.553060] ? mark_held_locks+0xc2/0x130 [ 571.569411] ? _raw_spin_unlock_irq+0x24/0x50 [ 571.586333] __ldsem_down_read_nested+0x2ca/0x5b0 [ 571.602337] ? __ldsem_wake+0x320/0x320 [ 571.615173] ? avc_has_extended_perms+0x406/0xd50 [ 571.630676] ? pty_write_room+0xc0/0xc0 [ 571.642587] ? tty_ldisc_ref_wait+0x20/0x80 [ 571.657965] tty_ldisc_ref_wait+0x20/0x80 [ 571.671032] tty_ioctl+0x4cb/0x13e0 [ 571.682514] ? tty_vhangup+0x30/0x30 [ 571.694081] ? avc_ss_reset+0x100/0x100 [ 571.706956] ? __lock_acquire+0x619/0x4320 [ 571.720108] ? trace_hardirqs_on+0x10/0x10 [ 571.733221] ? tty_vhangup+0x30/0x30 [ 571.745867] do_vfs_ioctl+0x1a0/0x1030 [ 571.757494] ? ioctl_preallocate+0x1d0/0x1d0 [ 571.771906] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 571.790876] ? percpu_free_rwsem+0x1/0x90 [ 571.803915] ? lock_acquire+0x10f/0x380 [ 571.815690] ? check_preemption_disabled+0x34/0x1e0 [ 571.831793] ? assoc_array_gc+0x111b/0x1120 [ 571.846098] ? __fget+0x22b/0x3a0 [ 571.857328] ? security_file_ioctl+0x7c/0xb0 [ 571.870593] SyS_ioctl+0x7e/0xb0 [ 571.882783] ? do_vfs_ioctl+0x1030/0x1030 [ 571.896389] do_syscall_64+0x19b/0x4b0 [ 571.908107] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 571.924411] RIP: 0033:0x440e79 [ 571.935377] RSP: 002b:00007ffed6d2fc48 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 571.958548] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79 [ 571.981260] RDX: 0000000020000000 RSI: 0000000000001261 RDI: 0000000000000002 [ 572.003961] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 572.028404] R10: 00000000ffffffff R11: 0000000000000217 R12: 000000000005cf10 [ 572.051122] R13: 0000000000401e50 R14: 0000000000000000 R15: 0000000000000000 [ 572.073812] INFO: task syz-executor556:2041 blocked for more than 140 seconds. [ 572.097568] Not tainted 4.14.81+ #6 [ 572.110620] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 572.135112] syz-executor556 D29656 2041 1 0x00000000 [ 572.154081] Call Trace: [ 572.161261] ? __schedule+0x729/0x1ed0 [ 572.175142] ? __sched_text_start+0x8/0x8 [ 572.187082] ? trace_hardirqs_on+0x10/0x10 [ 572.201279] ? trace_hardirqs_on+0x10/0x10 [ 572.214390] schedule+0x7f/0x1b0 [ 572.226984] schedule_timeout+0x710/0xe60 [ 572.240083] ? usleep_range+0x130/0x130 [ 572.253027] ? __ldsem_down_read_nested+0x2ad/0x5b0 [ 572.269112] ? mark_held_locks+0xc2/0x130 [ 572.283437] ? _raw_spin_unlock_irq+0x24/0x50 [ 572.298016] __ldsem_down_read_nested+0x2ca/0x5b0 [ 572.312875] ? __ldsem_wake+0x320/0x320 [ 572.325801] ? avc_has_extended_perms+0x406/0xd50 [ 572.341684] ? pty_write_room+0xc0/0xc0 [ 572.353463] ? tty_ldisc_ref_wait+0x20/0x80 [ 572.367861] tty_ldisc_ref_wait+0x20/0x80 [ 572.380885] tty_ioctl+0x4cb/0x13e0 [ 572.392293] ? tty_vhangup+0x30/0x30 [ 572.404850] ? avc_ss_reset+0x100/0x100 [ 572.417669] ? __lock_acquire+0x619/0x4320 [ 572.431853] ? trace_hardirqs_on+0x10/0x10 [ 572.444976] ? tty_vhangup+0x30/0x30 [ 572.455395] do_vfs_ioctl+0x1a0/0x1030 [ 572.469217] ? ioctl_preallocate+0x1d0/0x1d0 [ 572.482693] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 572.500584] ? percpu_free_rwsem+0x1/0x90 [ 572.514811] ? lock_acquire+0x10f/0x380 [ 572.527690] ? check_preemption_disabled+0x34/0x1e0 [ 572.542940] ? assoc_array_gc+0x111b/0x1120 [ 572.557224] ? __fget+0x22b/0x3a0 [ 572.567408] ? security_file_ioctl+0x7c/0xb0 [ 572.581712] SyS_ioctl+0x7e/0xb0 [ 572.592831] ? do_vfs_ioctl+0x1030/0x1030 [ 572.605846] do_syscall_64+0x19b/0x4b0 [ 572.618574] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 572.634817] RIP: 0033:0x440e79 [ 572.644776] RSP: 002b:00007ffed6d2fc48 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 572.669084] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79 [ 572.692941] RDX: 0000000020000000 RSI: 0000000000001261 RDI: 0000000000000004 [ 572.715658] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 572.738419] R10: 00000000ffffffff R11: 0000000000000217 R12: 000000000005cf1e [ 572.761162] R13: 0000000000401e50 R14: 0000000000000000 R15: 0000000000000000 [ 572.783867] INFO: task syz-executor556:2092 blocked for more than 140 seconds. [ 572.807271] Not tainted 4.14.81+ #6 [ 572.820295] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 572.845883] syz-executor556 D28712 2092 1 0x00000004 [ 572.863741] Call Trace: [ 572.871964] ? __schedule+0x729/0x1ed0 [ 572.884753] ? mark_held_locks+0xc2/0x130 [ 572.897786] ? __sched_text_start+0x8/0x8 [ 572.910834] ? trace_hardirqs_on+0x10/0x10 [ 572.925014] ? trace_hardirqs_on+0x10/0x10 [ 572.938638] ? __lock_acquire+0x619/0x4320 [ 572.951743] schedule+0x7f/0x1b0 [ 572.963121] schedule_timeout+0x710/0xe60 [ 572.977221] ? __lock_acquire+0x619/0x4320 [ 572.990393] ? usleep_range+0x130/0x130 [ 573.003259] ? __ldsem_down_read_nested+0x2ad/0x5b0 [ 573.019305] ? mark_held_locks+0xc2/0x130 [ 573.032394] ? _raw_spin_unlock_irq+0x24/0x50 [ 573.045811] __ldsem_down_read_nested+0x2ca/0x5b0 [ 573.062952] ? cpumask_any_but+0x81/0xa0 [ 573.074826] ? __ldsem_wake+0x320/0x320 [ 573.087646] ? avc_has_extended_perms+0x406/0xd50 [ 573.103563] ? pty_write_room+0xc0/0xc0 [ 573.115273] ? tty_ldisc_ref_wait+0x20/0x80 [ 573.129557] tty_ldisc_ref_wait+0x20/0x80 [ 573.142663] tty_ioctl+0x4cb/0x13e0 [ 573.155149] ? tty_vhangup+0x30/0x30 [ 573.165508] ? avc_ss_reset+0x100/0x100 [ 573.179423] ? __lock_acquire+0x619/0x4320 [ 573.192950] ? __lock_acquire+0x619/0x4320 [ 573.207110] ? do_wp_page+0x254/0x1880 [ 573.218888] ? trace_hardirqs_on+0x10/0x10 [ 573.233133] ? trace_hardirqs_on+0x10/0x10 [ 573.245128] ? __handle_mm_fault+0x657/0x23a0 [ 573.259568] ? tty_vhangup+0x30/0x30 [ 573.272288] do_vfs_ioctl+0x1a0/0x1030 [ 573.285059] ? ioctl_preallocate+0x1d0/0x1d0 [ 573.298347] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 573.316209] ? percpu_free_rwsem+0x1/0x90 [ 573.330338] ? lock_acquire+0x10f/0x380 [ 573.343168] ? check_preemption_disabled+0x34/0x1e0 [ 573.359273] ? assoc_array_gc+0x111b/0x1120 [ 573.372615] ? __fget+0x22b/0x3a0 [ 573.382740] ? security_file_ioctl+0x7c/0xb0 [ 573.397108] SyS_ioctl+0x7e/0xb0 [ 573.408254] ? do_vfs_ioctl+0x1030/0x1030 [ 573.422364] do_syscall_64+0x19b/0x4b0 [ 573.432899] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 573.450716] RIP: 0033:0x440e79 [ 573.460564] RSP: 002b:00007ffed6d2fc48 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 [ 573.485934] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79 [ 573.508663] RDX: 0000000020000000 RSI: 0000000000001261 RDI: 0000000000000005 [ 573.531386] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 573.554180] R10: 00000000004002c8 R11: 0000000000000207 R12: 000000000005cf6e [ 573.576884] R13: 0000000000401e50 R14: 0000000000000000 R15: 0000000000000000 [ 573.600743] INFO: task syz-executor556:2162 blocked for more than 140 seconds. [ 573.623513] Not tainted 4.14.81+ #6 [ 573.636488] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 573.661023] syz-executor556 D29656 2162 1 0x00000000 [ 573.678849] Call Trace: [ 573.687027] ? __schedule+0x729/0x1ed0 [ 573.699786] ? __sched_text_start+0x8/0x8 [ 573.712931] ? trace_hardirqs_on+0x10/0x10 [ 573.727087] ? trace_hardirqs_on+0x10/0x10 [ 573.740259] schedule+0x7f/0x1b0 [ 573.751431] schedule_timeout+0x710/0xe60 [ 573.764438] ? usleep_range+0x130/0x130 [ 573.777229] ? __ldsem_down_read_nested+0x2ad/0x5b0 [ 573.793313] ? mark_held_locks+0xc2/0x130 [ 573.806310] ? _raw_spin_unlock_irq+0x24/0x50 [ 573.820797] __ldsem_down_read_nested+0x2ca/0x5b0 [ 573.835687] ? __ldsem_wake+0x320/0x320 [ 573.849735] ? avc_has_extended_perms+0x406/0xd50 [ 573.864639] ? pty_write_room+0xc0/0xc0 [ 573.877459] ? tty_ldisc_ref_wait+0x20/0x80 [ 573.890670] tty_ldisc_ref_wait+0x20/0x80 [ 573.904801] tty_ioctl+0x4cb/0x13e0 [ 573.915089] ? tty_vhangup+0x30/0x30 [ 573.927687] ? avc_ss_reset+0x100/0x100 [ 573.940533] ? __lock_acquire+0x619/0x4320 [ 573.953661] ? trace_hardirqs_on+0x10/0x10 [ 573.966875] ? tty_vhangup+0x30/0x30 [ 573.979491] do_vfs_ioctl+0x1a0/0x1030 [ 573.991204] ? ioctl_preallocate+0x1d0/0x1d0 [ 574.005682] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 574.023674] ? percpu_free_rwsem+0x1/0x90 [ 574.037873] ? lock_acquire+0x10f/0x380 [ 574.049626] ? check_preemption_disabled+0x34/0x1e0 [ 574.068987] ? assoc_array_gc+0x111b/0x1120 [ 574.083261] ? __fget+0x22b/0x3a0 [ 574.094561] ? security_file_ioctl+0x7c/0xb0 [ 574.108514] SyS_ioctl+0x7e/0xb0 [ 574.119613] ? do_vfs_ioctl+0x1030/0x1030 [ 574.132667] do_syscall_64+0x19b/0x4b0 [ 574.145395] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 574.161615] RIP: 0033:0x440e79 [ 574.170353] RSP: 002b:00007ffed6d2fc48 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 574.195687] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79 [ 574.218436] RDX: 0000000020000000 RSI: 0000000000001261 RDI: 0000000000000004 [ 574.241638] RBP: 0000000000000000 R08: 0000000b004002c8 R09: 0000000b004002c8 [ 574.264275] R10: 00000000ffffffff R11: 0000000000000217 R12: 000000000005d0cd [ 574.287477] R13: 0000000000401e50 R14: 0000000000000000 R15: 0000000000000000 [ 574.309101] INFO: task syz-executor556:2368 blocked for more than 140 seconds. [ 574.334190] Not tainted 4.14.81+ #6 [ 574.347201] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 574.371787] syz-executor556 D29752 2368 1 0x00000000 [ 574.389591] Call Trace: [ 574.397862] ? __schedule+0x729/0x1ed0 [ 574.410687] ? __sched_text_start+0x8/0x8 [ 574.422614] ? trace_hardirqs_on+0x10/0x10 [ 574.438035] ? trace_hardirqs_on+0x10/0x10 [ 574.451165] ? unwind_next_frame+0xea9/0x1930 [ 574.464562] schedule+0x7f/0x1b0 [ 574.475760] schedule_timeout+0x710/0xe60 [ 574.488796] ? __is_insn_slot_addr+0x112/0x1f0 [ 574.504482] ? usleep_range+0x130/0x130 [ 574.517294] ? __ldsem_down_read_nested+0x2ad/0x5b0 [ 574.532324] ? mark_held_locks+0xc2/0x130 [ 574.545317] ? _raw_spin_unlock_irq+0x24/0x50 [ 574.559761] __ldsem_down_read_nested+0x2ca/0x5b0 [ 574.574651] ? __ldsem_wake+0x320/0x320 [ 574.587546] ? avc_has_extended_perms+0x406/0xd50 [ 574.603403] ? pty_write_room+0xc0/0xc0 [ 574.615161] ? tty_ldisc_ref_wait+0x20/0x80 [ 574.629653] tty_ldisc_ref_wait+0x20/0x80 [ 574.642725] tty_ioctl+0x4cb/0x13e0 [ 574.655215] ? tty_vhangup+0x30/0x30 [ 574.665671] ? avc_ss_reset+0x100/0x100 [ 574.679584] ? __lock_acquire+0x619/0x4320 [ 574.692718] ? trace_hardirqs_on+0x10/0x10 [ 574.705813] ? fs_reclaim_acquire+0x10/0x10 [ 574.720116] ? trace_hardirqs_on+0x10/0x10 [ 574.733197] ? __fd_install+0x20b/0x5e0 [ 574.746025] ? tty_vhangup+0x30/0x30 [ 574.758938] do_vfs_ioctl+0x1a0/0x1030 [ 574.770602] ? ioctl_preallocate+0x1d0/0x1d0 [ 574.784966] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 574.802870] ? percpu_free_rwsem+0x1/0x90 [ 574.816946] ? lock_acquire+0x10f/0x380 [ 574.828701] ? check_preemption_disabled+0x34/0x1e0 [ 574.843666] ? assoc_array_gc+0x111b/0x1120 [ 574.859085] ? __fget+0x22b/0x3a0 [ 574.869292] ? security_file_ioctl+0x7c/0xb0 [ 574.885106] SyS_ioctl+0x7e/0xb0 [ 574.895109] ? do_vfs_ioctl+0x1030/0x1030 [ 574.908114] do_syscall_64+0x19b/0x4b0 [ 574.919826] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 574.936193] RIP: 0033:0x440e79 [ 574.947113] RSP: 002b:00007ffed6d2fc48 EFLAGS: 00000203 ORIG_RAX: 0000000000000010 [ 574.971416] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440e79 [ 574.994127] RDX: 0000000020000000 RSI: 0000000000001261 RDI: 0000000000000002 [ 575.017332] RBP: 0000000000000000 R08: 00000000004002c8 R09: 00000000004002c8 [ 575.041194] R10: 00000000004002c8 R11: 0000000000000203 R12: 000000000005e1ac [ 575.063866] R13: 0000000000401e50 R14: 0000000000000000 R15: 0000000000000000 [ 575.086645] [ 575.086645] Showing all locks held in the system: [ 575.106241] 1 lock held by khungtaskd/23: [ 575.110464] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f [ 575.119493] 2 locks held by getty/1762: [ 575.123496] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.132605] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.141961] 2 locks held by syz-executor556/2013: [ 575.146792] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.156117] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.165431] 1 lock held by syz-executor556/2016: [ 575.170195] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.179144] 2 locks held by syz-executor556/2037: [ 575.184042] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.193177] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.202510] 1 lock held by syz-executor556/2041: [ 575.207255] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.216235] 1 lock held by syz-executor556/2092: [ 575.221020] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.229958] 2 locks held by syz-executor556/2098: [ 575.234842] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.243836] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.253157] 2 locks held by syz-executor556/2153: [ 575.257993] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.266987] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.276305] 1 lock held by syz-executor556/2162: [ 575.281077] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.290053] 2 locks held by syz-executor556/2181: [ 575.294896] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.303871] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.313214] 1 lock held by syz-executor556/2368: [ 575.317958] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.326933] 2 locks held by syz-executor556/2369: [ 575.331794] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.340762] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.350069] 1 lock held by syz-executor556/3498: [ 575.354807] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.363752] 1 lock held by syz-executor556/3503: [ 575.368496] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.377439] 2 locks held by syz-executor556/3504: [ 575.382278] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.391226] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.400534] 2 locks held by syz-executor556/3505: [ 575.405358] #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5d/0x70 [ 575.413694] #1: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_lock+0x19/0x40 [ 575.422295] 1 lock held by syz-executor556/3508: [ 575.427032] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.435982] 2 locks held by syz-executor556/3509: [ 575.440832] #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5d/0x70 [ 575.449166] #1: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_lock+0x19/0x40 [ 575.457790] 2 locks held by syz-executor556/3510: [ 575.462636] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.471596] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.480883] 1 lock held by syz-executor556/3513: [ 575.485620] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.494560] 2 locks held by syz-executor556/3514: [ 575.499386] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.508343] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.517639] 2 locks held by syz-executor556/3515: [ 575.522482] #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5d/0x70 [ 575.530849] #1: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_lock+0x19/0x40 [ 575.539429] 1 lock held by syz-executor556/3518: [ 575.544190] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.553138] 2 locks held by syz-executor556/3519: [ 575.557977] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 575.566934] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 575.576226] 2 locks held by syz-executor556/3520: executing program [ 575.581074] #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5d/0x70 [ 575.589396] #1: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_lock+0x19/0x40 [ 575.598042] [ 575.599652] ============================================= [ 575.599652] [ 576.470808] NMI backtrace for cpu 1 [ 576.474505] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.81+ #6 [ 576.480903] Call Trace: [ 576.483489] dump_stack+0xb9/0x11b [ 576.487051] ? irq_force_complete_move.cold.3+0x64/0x64 [ 576.492405] nmi_cpu_backtrace.cold.0+0x47/0x85 [ 576.497069] ? irq_force_complete_move.cold.3+0x64/0x64 [ 576.502423] nmi_trigger_cpumask_backtrace+0x121/0x146 [ 576.507695] watchdog+0x574/0xa70 [ 576.511154] ? reset_hung_task_detector+0x10/0x10 [ 576.515987] kthread+0x348/0x420 [ 576.519370] ? kthread_create_on_node+0xe0/0xe0 [ 576.524043] ret_from_fork+0x3a/0x50 [ 576.527812] Sending NMI from CPU 1 to CPUs 0: [ 576.532598] NMI backtrace for cpu 0 [ 576.532602] CPU: 0 PID: 2183 Comm: syz-executor556 Not tainted 4.14.81+ #6 [ 576.532605] task: ffff8801cb1a9780 task.stack: ffff8801cb0f0000 [ 576.532608] RIP: 0010:entry_SYSCALL_64_after_hwframe+0x4b/0xb7 [ 576.532610] RSP: 0018:ffff8801cb0f7f58 EFLAGS: 00000097 [ 576.532616] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 576.532619] RDX: 1ffff100396352f1 RSI: 0000000000000000 RDI: ffff8801cb1a9788 [ 576.532622] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 576.532625] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 576.532629] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 576.532632] FS: 0000000000d38880(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000 [ 576.532635] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 576.532638] CR2: 00007fffa72c5e30 CR3: 00000001cb21e005 CR4: 00000000001606b0 [ 576.532641] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 576.532650] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 576.532652] Call Trace: [ 576.532654] RIP: 0033:0x400f7a [ 576.532657] RSP: 002b:00007ffed6d2fad8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d [ 576.532662] RAX: fffffffffffffff6 RBX: 00000000ffffffff RCX: 0000000000400f7a [ 576.532665] RDX: 0000000040000000 RSI: 00007ffed6d2fc54 RDI: ffffffffffffffff [ 576.532669] RBP: 0000000000000003 R08: 00000000004002c8 R09: 00000000004002c8 [ 576.532672] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffed6d2fc54 [ 576.532675] R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000000 [ 576.532677] Code: ed 41 54 45 31 e4 41 55 45 31 ed 41 56 45 31 f6 41 57 45 31 ff e8 e7 20 60 fe 48 89 e7 e8 5a 4f 60 fe 0f ba a4 24 90 00 00 00 09 <73> 05 e8 b3 20 60 fe 48 8b 4c 24 58 4c 8b 9c 24 80 00 00 00 49 [ 576.661034] Kernel panic - not syncing: hung_task: blocked tasks [ 576.661043] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.81+ #6 [ 576.661046] Call Trace: [ 576.661059] dump_stack+0xb9/0x11b [ 576.661072] panic+0x1bf/0x3a4 [ 576.661080] ? add_taint.cold.4+0x16/0x16 [ 576.661103] watchdog+0x585/0xa70 [ 576.661120] ? reset_hung_task_detector+0x10/0x10 [ 576.661128] kthread+0x348/0x420 [ 576.661136] ? kthread_create_on_node+0xe0/0xe0 [ 576.661147] ret_from_fork+0x3a/0x50 [ 576.747833] Kernel Offset: 0x36200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 576.758791] Rebooting in 86400 seconds..