INIT: Id "6" 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 "2" respawning too fast: disabled for 5 minutes INIT: Id "1" respawning too fast: disabled for 5 minutes [ 832.498665] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. [ 838.158757] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 838.250791] audit: type=1400 audit(1540184417.725:7): avc: denied { map } for pid=1895 comm="syz-executor282" path="/root/syz-executor282806635" dev="sda1" ino=16461 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 INIT: Id "6" respawning too fast: disabled for 5 minutes INIT: Id "3" 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 "4" respawning too fast: disabled for 5 minutes INIT: Id "2" respawning too fast: disabled for 5 minutes [ 1001.440166] INFO: task syz-executor282:1957 blocked for more than 140 seconds. [ 1001.447726] Not tainted 4.14.78+ #22 [ 1001.452550] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.460687] syz-executor282 D28376 1957 1896 0x00000004 [ 1001.466314] Call Trace: [ 1001.468892] ? __schedule+0x729/0x1ed0 [ 1001.473036] ? __sched_text_start+0x8/0x8 [ 1001.477351] ? lock_downgrade+0x560/0x560 [ 1001.481679] ? lock_acquire+0x10f/0x380 [ 1001.485644] ? __mutex_lock+0x1bc/0x1480 [ 1001.489687] schedule+0x7f/0x1b0 [ 1001.493231] schedule_preempt_disabled+0x13/0x20 [ 1001.497970] __mutex_lock+0x521/0x1480 [ 1001.502003] ? blkdev_reread_part+0x18/0x30 [ 1001.506319] ? __wake_up_common_lock+0xd2/0x120 [ 1001.511179] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1001.516625] ? mark_held_locks+0xc2/0x130 [ 1001.521010] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1001.526102] ? trace_hardirqs_on_caller+0x381/0x520 [ 1001.531322] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1001.536423] ? __wake_up_common+0x5a0/0x5a0 [ 1001.540947] ? blkdev_reread_part+0x18/0x30 [ 1001.545265] blkdev_reread_part+0x18/0x30 [ 1001.549399] loop_reread_partitions+0x72/0x80 [ 1001.554152] loop_set_status+0xa84/0xf40 [ 1001.558208] loop_set_status64+0x8d/0xe0 [ 1001.562509] ? loop_set_status_old+0x2d0/0x2d0 [ 1001.567100] lo_ioctl+0x3cd/0x17d0 [ 1001.570752] ? loop_clr_fd+0xac0/0xac0 [ 1001.574664] blkdev_ioctl+0x57d/0x18c0 [ 1001.578527] ? blkpg_ioctl+0x920/0x920 [ 1001.582467] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1001.587815] ? debug_check_no_obj_freed+0x2b2/0x77c [ 1001.592848] ? lock_downgrade+0x560/0x560 [ 1001.596975] ? lock_acquire+0x10f/0x380 [ 1001.600981] ? debug_check_no_obj_freed+0x150/0x77c [ 1001.605982] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1001.611103] ? trace_hardirqs_on_caller+0x381/0x520 [ 1001.616106] block_ioctl+0xd9/0x120 [ 1001.619708] ? blkdev_fallocate+0x3b0/0x3b0 [ 1001.624050] do_vfs_ioctl+0x1a0/0x1030 [ 1001.627920] ? ioctl_preallocate+0x1d0/0x1d0 [ 1001.632346] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 1001.638041] ? rcu_read_lock_sched_held+0x102/0x120 [ 1001.643089] ? putname+0xcf/0x100 [ 1001.646525] ? do_sys_open+0x203/0x580 [ 1001.650533] ? filp_open+0x60/0x60 [ 1001.654070] ? security_file_ioctl+0x7c/0xb0 [ 1001.658527] SyS_ioctl+0x7e/0xb0 [ 1001.661934] ? do_vfs_ioctl+0x1030/0x1030 [ 1001.666073] do_syscall_64+0x19b/0x4b0 [ 1001.669945] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1001.675158] RIP: 0033:0x441347 [ 1001.678336] RSP: 002b:00007fff99d59f48 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1001.686071] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000441347 [ 1001.693391] RDX: 00007fff99d59fe0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 1001.700689] RBP: 00000000200013c8 R08: 0000000000000000 R09: 000000000000000a [ 1001.707939] R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 [ 1001.715249] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000 [ 1001.722540] INFO: task syz-executor282:1958 blocked for more than 140 seconds. [ 1001.730145] Not tainted 4.14.78+ #22 [ 1001.734358] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.742342] syz-executor282 D26552 1958 1900 0x00000004 [ 1001.747951] Call Trace: [ 1001.750568] ? __schedule+0x729/0x1ed0 [ 1001.754438] ? mutex_spin_on_owner+0x1c9/0x4a0 [ 1001.759009] ? __sched_text_start+0x8/0x8 [ 1001.763209] ? lock_downgrade+0x560/0x560 [ 1001.767346] ? lock_acquire+0x10f/0x380 [ 1001.771351] ? __mutex_lock+0x5fc/0x1480 [ 1001.775398] schedule+0x7f/0x1b0 [ 1001.778744] schedule_preempt_disabled+0x13/0x20 [ 1001.783522] __mutex_lock+0x521/0x1480 [ 1001.787475] ? loop_control_ioctl+0x180/0x310 [ 1001.792010] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1001.797452] ? avc_ss_reset+0x100/0x100 [ 1001.801503] ? __lock_acquire+0x619/0x4320 [ 1001.805730] ? __radix_tree_lookup+0x183/0x220 [ 1001.810347] ? loop_control_ioctl+0x180/0x310 [ 1001.814828] loop_control_ioctl+0x180/0x310 [ 1001.819142] ? loop_probe+0x180/0x180 [ 1001.823138] ? loop_probe+0x180/0x180 [ 1001.826927] do_vfs_ioctl+0x1a0/0x1030 [ 1001.830838] ? ioctl_preallocate+0x1d0/0x1d0 [ 1001.835235] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 1001.840980] ? lock_downgrade+0x560/0x560 [ 1001.845108] ? lock_acquire+0x10f/0x380 [ 1001.849072] ? security_file_ioctl+0x7c/0xb0 [ 1001.853501] SyS_ioctl+0x7e/0xb0 [ 1001.856952] ? do_vfs_ioctl+0x1030/0x1030 [ 1001.861127] do_syscall_64+0x19b/0x4b0 [ 1001.865002] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1001.870205] RIP: 0033:0x441439 [ 1001.873378] RSP: 002b:00007fff99d5a188 EFLAGS: 00000206 ORIG_RAX: 0000000000000010 [ 1001.881100] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441439 [ 1001.888347] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 [ 1001.895642] RBP: 0000000000000000 R08: 000000000000000c R09: 0000000000000001 [ 1001.902926] R10: 0000000000000000 R11: 0000000000000206 R12: 00000000000ccb0c [ 1001.910207] R13: 0000000000402300 R14: 0000000000000000 R15: 0000000000000000 [ 1001.917486] INFO: task syz-executor282:1959 blocked for more than 140 seconds. [ 1001.924878] Not tainted 4.14.78+ #22 [ 1001.929090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.937075] syz-executor282 D28472 1959 1899 0x00000004 [ 1001.942708] Call Trace: [ 1001.945374] ? __schedule+0x729/0x1ed0 [ 1001.949244] ? __sched_text_start+0x8/0x8 [ 1001.953407] ? lock_downgrade+0x560/0x560 [ 1001.957535] ? lock_acquire+0x10f/0x380 [ 1001.961518] ? __mutex_lock+0x1bc/0x1480 [ 1001.965560] schedule+0x7f/0x1b0 [ 1001.968905] schedule_preempt_disabled+0x13/0x20 [ 1001.973672] __mutex_lock+0x521/0x1480 [ 1001.977549] ? blkdev_reread_part+0x18/0x30 [ 1001.981887] ? __wake_up_common_lock+0xd2/0x120 [ 1001.986567] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1001.992030] ? mark_held_locks+0xc2/0x130 [ 1001.996159] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.001274] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.006269] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1002.011390] ? __wake_up_common+0x5a0/0x5a0 [ 1002.015934] ? blkdev_reread_part+0x18/0x30 [ 1002.020284] blkdev_reread_part+0x18/0x30 [ 1002.024418] loop_reread_partitions+0x72/0x80 [ 1002.029013] loop_set_status+0xa84/0xf40 [ 1002.033126] loop_set_status64+0x8d/0xe0 [ 1002.037255] ? loop_set_status_old+0x2d0/0x2d0 [ 1002.041883] lo_ioctl+0x3cd/0x17d0 [ 1002.045415] ? loop_clr_fd+0xac0/0xac0 [ 1002.049277] blkdev_ioctl+0x57d/0x18c0 [ 1002.053180] ? blkpg_ioctl+0x920/0x920 [ 1002.057048] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.062445] ? debug_check_no_obj_freed+0x2b2/0x77c [ 1002.067450] ? lock_downgrade+0x560/0x560 [ 1002.071627] ? lock_acquire+0x10f/0x380 [ 1002.075583] ? debug_check_no_obj_freed+0x150/0x77c [ 1002.080828] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.085930] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.090970] block_ioctl+0xd9/0x120 [ 1002.094575] ? blkdev_fallocate+0x3b0/0x3b0 [ 1002.098884] do_vfs_ioctl+0x1a0/0x1030 [ 1002.102801] ? ioctl_preallocate+0x1d0/0x1d0 [ 1002.107197] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 1002.112932] ? rcu_read_lock_sched_held+0x102/0x120 [ 1002.117929] ? putname+0xcf/0x100 [ 1002.121413] ? do_sys_open+0x203/0x580 [ 1002.125286] ? filp_open+0x60/0x60 [ 1002.128807] ? security_file_ioctl+0x7c/0xb0 [ 1002.133239] SyS_ioctl+0x7e/0xb0 [ 1002.136590] ? do_vfs_ioctl+0x1030/0x1030 [ 1002.140770] do_syscall_64+0x19b/0x4b0 [ 1002.144656] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.149829] RIP: 0033:0x441347 [ 1002.153043] RSP: 002b:00007fff99d59f48 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1002.160857] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000441347 [ 1002.168375] RDX: 00007fff99d59fe0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 1002.175673] RBP: 00000000200013c8 R08: 0000000000000000 R09: 000000000000000a [ 1002.183006] R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 [ 1002.190304] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000 [ 1002.197568] INFO: task syz-executor282:1960 blocked for more than 140 seconds. [ 1002.204965] Not tainted 4.14.78+ #22 [ 1002.209180] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.217166] syz-executor282 D28296 1960 1901 0x00000004 [ 1002.222870] Call Trace: [ 1002.225455] ? __schedule+0x729/0x1ed0 [ 1002.229323] ? __sched_text_start+0x8/0x8 [ 1002.233509] ? lock_downgrade+0x560/0x560 [ 1002.237652] ? lock_acquire+0x10f/0x380 [ 1002.241660] ? __mutex_lock+0x1bc/0x1480 [ 1002.245712] schedule+0x7f/0x1b0 [ 1002.249171] schedule_preempt_disabled+0x13/0x20 [ 1002.253959] __mutex_lock+0x521/0x1480 [ 1002.257833] ? blkdev_reread_part+0x18/0x30 [ 1002.262173] ? __wake_up_common_lock+0xd2/0x120 [ 1002.266824] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1002.272286] ? mark_held_locks+0xc2/0x130 [ 1002.276413] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.281526] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.286618] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1002.291762] ? __wake_up_common+0x5a0/0x5a0 [ 1002.296072] ? blkdev_reread_part+0x18/0x30 [ 1002.300486] blkdev_reread_part+0x18/0x30 [ 1002.304688] loop_reread_partitions+0x72/0x80 [ 1002.309169] loop_set_status+0xa84/0xf40 [ 1002.313279] loop_set_status64+0x8d/0xe0 [ 1002.317331] ? loop_set_status_old+0x2d0/0x2d0 [ 1002.321959] lo_ioctl+0x3cd/0x17d0 [ 1002.325491] ? loop_clr_fd+0xac0/0xac0 [ 1002.329361] blkdev_ioctl+0x57d/0x18c0 [ 1002.333281] ? blkpg_ioctl+0x920/0x920 [ 1002.337157] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.342555] ? debug_check_no_obj_freed+0x2b2/0x77c [ 1002.347564] ? lock_downgrade+0x560/0x560 [ 1002.351741] ? lock_acquire+0x10f/0x380 [ 1002.355699] ? debug_check_no_obj_freed+0x150/0x77c [ 1002.360810] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.365907] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.370961] block_ioctl+0xd9/0x120 [ 1002.374571] ? blkdev_fallocate+0x3b0/0x3b0 [ 1002.378877] do_vfs_ioctl+0x1a0/0x1030 [ 1002.382803] ? ioctl_preallocate+0x1d0/0x1d0 [ 1002.387264] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 1002.393032] ? rcu_read_lock_sched_held+0x102/0x120 [ 1002.398035] ? putname+0xcf/0x100 [ 1002.401512] ? do_sys_open+0x203/0x580 [ 1002.405385] ? filp_open+0x60/0x60 [ 1002.408908] ? security_file_ioctl+0x7c/0xb0 [ 1002.413446] SyS_ioctl+0x7e/0xb0 [ 1002.416810] ? do_vfs_ioctl+0x1030/0x1030 [ 1002.421011] do_syscall_64+0x19b/0x4b0 [ 1002.424890] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.430097] RIP: 0033:0x441347 [ 1002.433269] RSP: 002b:00007fff99d59f48 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1002.440991] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000441347 [ 1002.448240] RDX: 00007fff99d59fe0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 1002.455551] RBP: 00000000200013c8 R08: 0000000000000000 R09: 000000000000000a [ 1002.462835] R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 [ 1002.470138] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000 [ 1002.477411] INFO: task syz-executor282:1961 blocked for more than 140 seconds. [ 1002.484801] Not tainted 4.14.78+ #22 [ 1002.489014] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.497005] syz-executor282 D28664 1961 1897 0x00000004 [ 1002.502704] Call Trace: [ 1002.505285] ? __schedule+0x729/0x1ed0 [ 1002.509155] ? __sched_text_start+0x8/0x8 [ 1002.513373] ? lock_downgrade+0x560/0x560 [ 1002.517508] ? lock_acquire+0x10f/0x380 [ 1002.521522] ? __mutex_lock+0x1bc/0x1480 [ 1002.525727] schedule+0x7f/0x1b0 [ 1002.529120] schedule_preempt_disabled+0x13/0x20 [ 1002.533909] __mutex_lock+0x521/0x1480 [ 1002.537782] ? blkdev_reread_part+0x18/0x30 [ 1002.542117] ? __wake_up_common_lock+0xd2/0x120 [ 1002.546765] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1002.552303] ? mark_held_locks+0xc2/0x130 [ 1002.556440] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.561616] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.566632] ? _raw_spin_unlock_irqrestore+0x41/0x70 [ 1002.571776] ? __wake_up_common+0x5a0/0x5a0 [ 1002.576089] ? blkdev_reread_part+0x18/0x30 [ 1002.580439] blkdev_reread_part+0x18/0x30 [ 1002.584576] loop_reread_partitions+0x72/0x80 [ 1002.589048] loop_set_status+0xa84/0xf40 [ 1002.593128] loop_set_status64+0x8d/0xe0 [ 1002.597287] ? loop_set_status_old+0x2d0/0x2d0 [ 1002.601917] lo_ioctl+0x3cd/0x17d0 [ 1002.605447] ? loop_clr_fd+0xac0/0xac0 [ 1002.609315] blkdev_ioctl+0x57d/0x18c0 [ 1002.613226] ? blkpg_ioctl+0x920/0x920 [ 1002.617097] ? entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.622487] ? debug_check_no_obj_freed+0x2b2/0x77c [ 1002.627487] ? lock_downgrade+0x560/0x560 [ 1002.631663] ? lock_acquire+0x10f/0x380 [ 1002.635624] ? debug_check_no_obj_freed+0x150/0x77c [ 1002.640682] ? _raw_spin_unlock_irqrestore+0x54/0x70 [ 1002.645777] ? trace_hardirqs_on_caller+0x381/0x520 [ 1002.650829] block_ioctl+0xd9/0x120 [ 1002.654439] ? blkdev_fallocate+0x3b0/0x3b0 [ 1002.658786] do_vfs_ioctl+0x1a0/0x1030 [ 1002.662717] ? ioctl_preallocate+0x1d0/0x1d0 [ 1002.667115] ? selinux_parse_skb.constprop.42+0x1a90/0x1a90 [ 1002.672954] ? rcu_read_lock_sched_held+0x102/0x120 [ 1002.677973] ? putname+0xcf/0x100 [ 1002.681479] ? do_sys_open+0x203/0x580 [ 1002.685366] ? filp_open+0x60/0x60 [ 1002.689000] ? security_file_ioctl+0x7c/0xb0 [ 1002.693462] SyS_ioctl+0x7e/0xb0 [ 1002.696814] ? do_vfs_ioctl+0x1030/0x1030 [ 1002.700985] do_syscall_64+0x19b/0x4b0 [ 1002.704873] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.710124] RIP: 0033:0x441347 [ 1002.713360] RSP: 002b:00007fff99d59f48 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1002.721134] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000441347 [ 1002.728393] RDX: 00007fff99d59fe0 RSI: 0000000000004c04 RDI: 0000000000000005 [ 1002.735714] RBP: 00000000200013c8 R08: 0000000000000000 R09: 000000000000000a [ 1002.742997] R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000005 [ 1002.750420] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000 [ 1002.757700] INFO: task syz-executor282:1963 blocked for more than 140 seconds. [ 1002.765112] Not tainted 4.14.78+ #22 [ 1002.769378] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.777401] syz-executor282 D29016 1963 1898 0x00000004 [ 1002.783049] Call Trace: [ 1002.785649] ? __schedule+0x729/0x1ed0 [ 1002.789536] ? __sched_text_start+0x8/0x8 [ 1002.793719] ? lock_downgrade+0x560/0x560 [ 1002.797857] ? lock_acquire+0x10f/0x380 [ 1002.802000] ? __mutex_lock+0x1bc/0x1480 [ 1002.806050] schedule+0x7f/0x1b0 [ 1002.809395] schedule_preempt_disabled+0x13/0x20 [ 1002.814197] __mutex_lock+0x521/0x1480 [ 1002.818087] ? __blkdev_get+0xf3/0xe50 [ 1002.822007] ? lock_downgrade+0x560/0x560 [ 1002.826150] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1002.831632] ? refcount_inc_not_zero+0x6b/0xb0 [ 1002.836230] ? get_disk+0xd0/0xd0 [ 1002.839669] ? blkdev_ioctl+0x18c0/0x18c0 [ 1002.843854] ? exact_match+0x9/0x20 [ 1002.847469] ? get_disk+0xd0/0xd0 [ 1002.850940] ? kobj_lookup+0x335/0x420 [ 1002.854818] ? __blkdev_get+0xf3/0xe50 [ 1002.858681] __blkdev_get+0xf3/0xe50 [ 1002.862467] ? trace_hardirqs_on+0x10/0x10 [ 1002.866696] ? __blkdev_put+0x6e0/0x6e0 [ 1002.870714] ? check_preemption_disabled+0x34/0x160 [ 1002.875718] ? fsnotify+0x639/0x12d0 [ 1002.879416] blkdev_get+0x97/0x8c0 [ 1002.882986] ? bd_may_claim+0xe0/0xe0 [ 1002.886775] ? bd_acquire+0x171/0x2c0 [ 1002.890674] ? lock_downgrade+0x560/0x560 [ 1002.894852] ? lock_acquire+0x10f/0x380 [ 1002.898812] ? bd_acquire+0x21/0x2c0 [ 1002.902649] blkdev_open+0x1bd/0x240 [ 1002.906454] ? security_file_open+0x88/0x190 [ 1002.910899] do_dentry_open+0x426/0xda0 [ 1002.914867] ? bd_acquire+0x2c0/0x2c0 [ 1002.918662] vfs_open+0x11c/0x210 [ 1002.922151] path_openat+0x4eb/0x23a0 [ 1002.925944] ? path_mountpoint+0x9a0/0x9a0 [ 1002.930257] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 1002.934750] ? trace_hardirqs_on+0x10/0x10 [ 1002.938977] ? new_slab+0x358/0x470 [ 1002.942651] ? new_slab+0x25f/0x470 [ 1002.946272] do_filp_open+0x197/0x270 [ 1002.950102] ? may_open_dev+0xd0/0xd0 [ 1002.953898] ? _raw_spin_unlock+0x29/0x40 [ 1002.958035] do_sys_open+0x2ef/0x580 [ 1002.961788] ? filp_open+0x60/0x60 [ 1002.965457] ? up_read+0x17/0x30 [ 1002.968804] ? __do_page_fault+0x64c/0xb60 [ 1002.973077] ? do_syscall_64+0x43/0x4b0 [ 1002.977036] ? do_sys_open+0x580/0x580 [ 1002.980942] do_syscall_64+0x19b/0x4b0 [ 1002.984824] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1002.989999] RIP: 0033:0x401340 [ 1002.993232] RSP: 002b:00007fff99d59f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1003.001066] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000401340 [ 1003.008316] RDX: 00007fff99d5a0da RSI: 0000000000000002 RDI: 00007fff99d5a0d0 [ 1003.015602] RBP: 00000000200013c8 R08: 0000000000000000 R09: 000000000000000a [ 1003.023050] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000005 [ 1003.030362] R13: 0000000000000004 R14: 0000000000000004 R15: 0000000000000000 [ 1003.037630] INFO: task blkid:1965 blocked for more than 140 seconds. [ 1003.044136] Not tainted 4.14.78+ #22 [ 1003.048350] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.056347] blkid D27528 1965 287 0x00000004 [ 1003.061989] Call Trace: [ 1003.064577] ? __schedule+0x729/0x1ed0 [ 1003.068451] ? __sched_text_start+0x8/0x8 [ 1003.072655] ? lock_downgrade+0x560/0x560 [ 1003.076787] ? lock_acquire+0x10f/0x380 [ 1003.080821] ? __mutex_lock+0x1bc/0x1480 [ 1003.084876] schedule+0x7f/0x1b0 [ 1003.088233] schedule_preempt_disabled+0x13/0x20 [ 1003.093014] __mutex_lock+0x521/0x1480 [ 1003.096884] ? generic_error_remove_page+0xa0/0xa0 [ 1003.101850] ? lo_release+0x1a/0x190 [ 1003.105565] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1003.111048] ? check_preemption_disabled+0x34/0x160 [ 1003.116063] ? lock_downgrade+0x560/0x560 [ 1003.120397] ? lock_acquire+0x10f/0x380 [ 1003.124363] ? __blkdev_put+0x1ce/0x6e0 [ 1003.128317] ? lo_compat_ioctl+0x130/0x130 [ 1003.132581] ? lo_release+0x1a/0x190 [ 1003.136286] lo_release+0x1a/0x190 [ 1003.139809] __blkdev_put+0x526/0x6e0 [ 1003.143637] ? bd_set_size+0x320/0x320 [ 1003.147509] ? locks_remove_file+0x2de/0x450 [ 1003.152119] ? blkdev_put+0x4d0/0x4d0 [ 1003.155904] ? blkdev_put+0x75/0x4d0 [ 1003.159597] ? blkdev_put+0x4d0/0x4d0 [ 1003.163424] blkdev_close+0x86/0xb0 [ 1003.167041] __fput+0x25e/0x6f0 [ 1003.170354] task_work_run+0x116/0x190 [ 1003.174235] exit_to_usermode_loop+0x12e/0x150 [ 1003.178803] do_syscall_64+0x35d/0x4b0 [ 1003.182732] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1003.187911] RIP: 0033:0x7f09102fd2b0 [ 1003.191726] RSP: 002b:00007fffe3c116e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 1003.199425] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f09102fd2b0 [ 1003.206761] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 1003.214213] RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000 [ 1003.221510] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000b48030 [ 1003.229009] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005 [ 1003.236344] INFO: task blkid:1966 blocked for more than 140 seconds. [ 1003.242937] Not tainted 4.14.78+ #22 [ 1003.247146] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.255142] blkid D29000 1966 1914 0x00000004 [ 1003.260778] Call Trace: [ 1003.263354] ? __schedule+0x729/0x1ed0 [ 1003.267229] ? mutex_spin_on_owner+0x1c9/0x4a0 [ 1003.271854] ? __sched_text_start+0x8/0x8 [ 1003.275998] ? lock_downgrade+0x560/0x560 [ 1003.280178] ? lock_acquire+0x10f/0x380 [ 1003.284142] ? __mutex_lock+0x5fc/0x1480 [ 1003.288190] schedule+0x7f/0x1b0 [ 1003.291606] schedule_preempt_disabled+0x13/0x20 [ 1003.296413] __mutex_lock+0x521/0x1480 [ 1003.300339] ? __mutex_lock+0x6f4/0x1480 [ 1003.304387] ? lo_open+0x17/0xa0 [ 1003.307735] ? blkdev_ioctl+0x17e1/0x18c0 [ 1003.311927] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1003.317361] ? refcount_inc_not_zero+0x6b/0xb0 [ 1003.321995] ? disk_get_part+0x9a/0x140 [ 1003.325956] ? refcount_inc_not_zero+0x6b/0xb0 [ 1003.330592] ? check_preemption_disabled+0x34/0x160 [ 1003.335599] ? loop_unregister_transfer+0x90/0x90 [ 1003.340460] ? lo_open+0x17/0xa0 [ 1003.343887] lo_open+0x17/0xa0 [ 1003.347073] __blkdev_get+0x267/0xe50 [ 1003.350916] ? __blkdev_put+0x6e0/0x6e0 [ 1003.354877] ? check_preemption_disabled+0x34/0x160 [ 1003.359875] ? fsnotify+0x639/0x12d0 [ 1003.363634] blkdev_get+0x97/0x8c0 [ 1003.367168] ? bd_may_claim+0xe0/0xe0 [ 1003.371001] ? bd_acquire+0x171/0x2c0 [ 1003.374834] ? lock_downgrade+0x560/0x560 [ 1003.380964] ? lock_acquire+0x10f/0x380 [ 1003.384953] ? bd_acquire+0x21/0x2c0 [ 1003.388649] blkdev_open+0x1bd/0x240 [ 1003.392389] ? security_file_open+0x88/0x190 [ 1003.396871] do_dentry_open+0x426/0xda0 [ 1003.400868] ? bd_acquire+0x2c0/0x2c0 [ 1003.404742] vfs_open+0x11c/0x210 [ 1003.408175] path_openat+0x4eb/0x23a0 [ 1003.412125] ? path_mountpoint+0x9a0/0x9a0 [ 1003.416449] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 1003.420983] ? trace_hardirqs_on+0x10/0x10 [ 1003.425214] do_filp_open+0x197/0x270 [ 1003.429001] ? may_open_dev+0xd0/0xd0 [ 1003.432841] ? _raw_spin_unlock+0x29/0x40 [ 1003.436985] do_sys_open+0x2ef/0x580 [ 1003.440733] ? filp_open+0x60/0x60 [ 1003.444258] ? up_read+0x17/0x30 [ 1003.447603] ? __do_page_fault+0x64c/0xb60 [ 1003.451868] ? do_syscall_64+0x43/0x4b0 [ 1003.455838] ? do_sys_open+0x580/0x580 [ 1003.459707] do_syscall_64+0x19b/0x4b0 [ 1003.463677] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1003.468854] RIP: 0033:0x7f2d2adbb120 [ 1003.472721] RSP: 002b:00007ffeb6833868 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1003.480438] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2d2adbb120 [ 1003.487796] RDX: 00007ffeb6835f41 RSI: 0000000000000000 RDI: 00007ffeb6835f41 [ 1003.495276] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 1003.502557] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001912030 [ 1003.509806] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 1003.517130] INFO: task blkid:1971 blocked for more than 140 seconds. [ 1003.523687] Not tainted 4.14.78+ #22 [ 1003.527901] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.535893] blkid D29000 1971 1919 0x00000004 [ 1003.541539] Call Trace: [ 1003.544122] ? __schedule+0x729/0x1ed0 [ 1003.547991] ? __sched_text_start+0x8/0x8 [ 1003.552162] ? lock_downgrade+0x560/0x560 [ 1003.556290] ? lock_acquire+0x10f/0x380 [ 1003.560281] ? __mutex_lock+0x1bc/0x1480 [ 1003.564332] schedule+0x7f/0x1b0 [ 1003.567680] schedule_preempt_disabled+0x13/0x20 [ 1003.572659] __mutex_lock+0x521/0x1480 [ 1003.576729] ? __mutex_lock+0x6f4/0x1480 [ 1003.580825] ? lo_open+0x17/0xa0 [ 1003.584180] ? blkdev_ioctl+0x17e0/0x18c0 [ 1003.588308] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1003.593788] ? refcount_inc_not_zero+0x6b/0xb0 [ 1003.598355] ? get_disk+0xd0/0xd0 [ 1003.601819] ? blkdev_ioctl+0x18c0/0x18c0 [ 1003.605950] ? exact_match+0x9/0x20 [ 1003.609560] ? get_disk+0xd0/0xd0 [ 1003.613039] ? kobj_lookup+0x335/0x420 [ 1003.616915] ? loop_unregister_transfer+0x90/0x90 [ 1003.621875] ? lo_open+0x17/0xa0 [ 1003.625232] lo_open+0x17/0xa0 [ 1003.628529] __blkdev_get+0x8e2/0xe50 [ 1003.632369] ? trace_hardirqs_on+0x10/0x10 [ 1003.636600] ? __blkdev_put+0x6e0/0x6e0 [ 1003.640611] ? check_preemption_disabled+0x34/0x160 [ 1003.645611] ? fsnotify+0x639/0x12d0 [ 1003.649306] blkdev_get+0x97/0x8c0 [ 1003.652871] ? bd_may_claim+0xe0/0xe0 [ 1003.656661] ? bd_acquire+0x171/0x2c0 [ 1003.660489] ? lock_downgrade+0x560/0x560 [ 1003.664615] ? lock_acquire+0x10f/0x380 [ 1003.668564] ? bd_acquire+0x21/0x2c0 [ 1003.672315] blkdev_open+0x1bd/0x240 [ 1003.676015] ? security_file_open+0x88/0x190 [ 1003.680459] do_dentry_open+0x426/0xda0 [ 1003.684634] ? bd_acquire+0x2c0/0x2c0 [ 1003.688423] vfs_open+0x11c/0x210 [ 1003.691914] path_openat+0x4eb/0x23a0 [ 1003.695710] ? path_mountpoint+0x9a0/0x9a0 [ 1003.699957] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 1003.704485] ? trace_hardirqs_on+0x10/0x10 [ 1003.708712] ? new_slab+0x358/0x470 [ 1003.712370] ? new_slab+0x25f/0x470 [ 1003.716089] do_filp_open+0x197/0x270 [ 1003.719873] ? may_open_dev+0xd0/0xd0 [ 1003.723775] ? _raw_spin_unlock+0x29/0x40 [ 1003.727922] do_sys_open+0x2ef/0x580 [ 1003.731672] ? filp_open+0x60/0x60 [ 1003.735198] ? up_read+0x17/0x30 [ 1003.738553] ? __do_page_fault+0x64c/0xb60 [ 1003.742822] ? do_syscall_64+0x43/0x4b0 [ 1003.746782] ? do_sys_open+0x580/0x580 [ 1003.750709] do_syscall_64+0x19b/0x4b0 [ 1003.754595] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1003.759771] RIP: 0033:0x7f208e524120 [ 1003.763508] RSP: 002b:00007fffad751538 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1003.771236] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f208e524120 [ 1003.778492] RDX: 00007fffad751f41 RSI: 0000000000000000 RDI: 00007fffad751f41 [ 1003.785793] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 1003.793074] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009b7030 [ 1003.800367] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 1003.807745] INFO: task blkid:1972 blocked for more than 140 seconds. [ 1003.814271] Not tainted 4.14.78+ #22 [ 1003.818489] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1003.826486] blkid D27816 1972 286 0x00000004 [ 1003.832127] Call Trace: [ 1003.834756] ? __schedule+0x729/0x1ed0 [ 1003.838634] ? __sched_text_start+0x8/0x8 [ 1003.843414] ? lock_downgrade+0x560/0x560 [ 1003.847572] ? lock_acquire+0x10f/0x380 [ 1003.851964] ? __mutex_lock+0x1bc/0x1480 [ 1003.856019] schedule+0x7f/0x1b0 [ 1003.859368] schedule_preempt_disabled+0x13/0x20 [ 1003.864231] __mutex_lock+0x521/0x1480 [ 1003.868104] ? __mutex_lock+0x6f4/0x1480 [ 1003.872266] ? lo_open+0x17/0xa0 [ 1003.875620] ? blkdev_ioctl+0x17e0/0x18c0 [ 1003.879744] ? __ww_mutex_wakeup_for_backoff+0x240/0x240 [ 1003.885273] ? refcount_inc_not_zero+0x6b/0xb0 [ 1003.889846] ? get_disk+0xd0/0xd0 [ 1003.893393] ? blkdev_ioctl+0x18c0/0x18c0 [ 1003.897526] ? exact_match+0x9/0x20 [ 1003.901255] ? get_disk+0xd0/0xd0 [ 1003.904696] ? kobj_lookup+0x335/0x420 [ 1003.908566] ? loop_unregister_transfer+0x90/0x90 [ 1003.913503] ? lo_open+0x17/0xa0 [ 1003.916852] lo_open+0x17/0xa0 [ 1003.920117] __blkdev_get+0x8e2/0xe50 [ 1003.923911] ? trace_hardirqs_on+0x10/0x10 [ 1003.928197] ? __blkdev_put+0x6e0/0x6e0 [ 1003.932303] ? check_preemption_disabled+0x34/0x160 [ 1003.937303] ? fsnotify+0x639/0x12d0 [ 1003.941096] blkdev_get+0x97/0x8c0 [ 1003.944681] ? bd_may_claim+0xe0/0xe0 [ 1003.948503] ? bd_acquire+0x171/0x2c0 [ 1003.952403] ? lock_downgrade+0x560/0x560 [ 1003.956532] ? lock_acquire+0x10f/0x380 [ 1003.960599] ? bd_acquire+0x21/0x2c0 [ 1003.964406] blkdev_open+0x1bd/0x240 [ 1003.968105] ? security_file_open+0x88/0x190 [ 1003.972606] do_dentry_open+0x426/0xda0 [ 1003.976561] ? bd_acquire+0x2c0/0x2c0 [ 1003.980747] vfs_open+0x11c/0x210 [ 1003.984235] path_openat+0x4eb/0x23a0 [ 1003.988026] ? path_mountpoint+0x9a0/0x9a0 [ 1003.992362] ? kasan_kmalloc.part.1+0x4f/0xd0 [ 1003.996842] ? trace_hardirqs_on+0x10/0x10 [ 1004.001154] do_filp_open+0x197/0x270 [ 1004.004951] ? may_open_dev+0xd0/0xd0 [ 1004.008749] ? _raw_spin_unlock+0x29/0x40 [ 1004.013279] do_sys_open+0x2ef/0x580 [ 1004.016983] ? filp_open+0x60/0x60 [ 1004.020650] ? up_read+0x17/0x30 [ 1004.024010] ? __do_page_fault+0x64c/0xb60 [ 1004.028359] ? do_syscall_64+0x43/0x4b0 [ 1004.032444] ? do_sys_open+0x580/0x580 [ 1004.036367] do_syscall_64+0x19b/0x4b0 [ 1004.040351] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1004.045524] RIP: 0033:0x7f1f4ea3c120 [ 1004.049223] RSP: 002b:00007fff5d24c978 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1004.057028] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1f4ea3c120 [ 1004.064362] RDX: 00007fff5d24df41 RSI: 0000000000000000 RDI: 00007fff5d24df41 [ 1004.071730] RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 [ 1004.078989] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001ff9030 [ 1004.086439] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 1004.093927] [ 1004.093927] Showing all locks held in the system: [ 1004.100356] 1 lock held by khungtaskd/23: [ 1004.104491] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f [ 1004.113584] 2 locks held by getty/1754: [ 1004.117535] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 [ 1004.126502] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 [ 1004.135803] 2 locks held by syz-executor282/1957: [ 1004.140653] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x85/0x17d0 [ 1004.149226] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x18/0x30 [ 1004.158201] 2 locks held by syz-executor282/1958: [ 1004.163063] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x71/0x310 [ 1004.172211] #1: (&lo->lo_ctl_mutex#2){+.+.}, at: [] loop_control_ioctl+0x180/0x310 [ 1004.181699] 2 locks held by syz-executor282/1959: [ 1004.186517] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x85/0x17d0 [ 1004.195125] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x18/0x30 [ 1004.204077] 2 locks held by syz-executor282/1960: [ 1004.208932] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x85/0x17d0 [ 1004.217600] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x18/0x30 [ 1004.226565] 2 locks held by syz-executor282/1961: [ 1004.231432] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x85/0x17d0 [ 1004.240063] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x18/0x30 [ 1004.248992] 1 lock held by syz-executor282/1963: [ 1004.253765] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.262292] 2 locks held by blkid/1965: [ 1004.266250] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_put+0xb1/0x6e0 [ 1004.274772] #1: (loop_index_mutex){+.+.}, at: [] lo_release+0x1a/0x190 [ 1004.283233] 2 locks held by blkid/1966: [ 1004.287196] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.295745] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x17/0xa0 [ 1004.303849] 2 locks held by blkid/1971: [ 1004.308156] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.316698] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x17/0xa0 [ 1004.324820] 2 locks held by blkid/1972: [ 1004.328783] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.337329] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x17/0xa0 [ 1004.345439] 2 locks held by blkid/1973: [ 1004.349400] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.357942] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x17/0xa0 [ 1004.366046] 2 locks held by blkid/1974: [ 1004.370062] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0xf3/0xe50 [ 1004.378565] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x17/0xa0 [ 1004.386677] [ 1004.388301] ============================================= [ 1004.388301] [ 1004.395560] NMI backtrace for cpu 0 [ 1004.399192] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.78+ #22 [ 1004.405658] Call Trace: [ 1004.408233] dump_stack+0xb9/0x11b [ 1004.411756] ? irq_force_complete_move.cold.3+0x64/0x64 [ 1004.417103] nmi_cpu_backtrace.cold.0+0x47/0x85 [ 1004.421751] ? irq_force_complete_move.cold.3+0x64/0x64 [ 1004.427088] nmi_trigger_cpumask_backtrace+0x121/0x146 [ 1004.432346] watchdog+0x574/0xa70 [ 1004.435781] ? reset_hung_task_detector+0x10/0x10 [ 1004.440598] kthread+0x348/0x420 [ 1004.443941] ? kthread_create_on_node+0xe0/0xe0 [ 1004.448587] ret_from_fork+0x3a/0x50 [ 1004.452386] Sending NMI from CPU 0 to CPUs 1: [ 1004.456932] NMI backtrace for cpu 1 skipped: idling at pc 0xffffffffbb056702 [ 1004.457885] Kernel panic - not syncing: hung_task: blocked tasks [ 1004.457894] CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.78+ #22 [ 1004.457897] Call Trace: [ 1004.457909] dump_stack+0xb9/0x11b [ 1004.457922] panic+0x1bf/0x3a4 [ 1004.457930] ? add_taint.cold.4+0x16/0x16 [ 1004.457954] watchdog+0x585/0xa70 [ 1004.457971] ? reset_hung_task_detector+0x10/0x10 [ 1004.457979] kthread+0x348/0x420 [ 1004.457986] ? kthread_create_on_node+0xe0/0xe0 [ 1004.457997] ret_from_fork+0x3a/0x50 [ 1004.510466] Kernel Offset: 0x38800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 1004.521397] Rebooting in 86400 seconds..