[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.124' (ECDSA) to the list of known hosts. 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 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 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 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 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 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 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 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 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 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 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 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 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 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 syzkaller login: [ 1001.327165] INFO: task systemd-udevd:8153 blocked for more than 140 seconds. [ 1001.334394] Not tainted 4.14.290-syzkaller #0 [ 1001.340682] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.349020] systemd-udevd D27968 8153 4627 0x00000304 [ 1001.354632] Call Trace: [ 1001.357734] __schedule+0x88b/0x1de0 [ 1001.361438] ? io_schedule_timeout+0x140/0x140 [ 1001.365996] ? lock_downgrade+0x740/0x740 [ 1001.371501] schedule+0x8d/0x1b0 [ 1001.374862] schedule_preempt_disabled+0xf/0x20 [ 1001.380256] __mutex_lock+0x669/0x1310 [ 1001.384137] ? __blkdev_get+0x191/0x1090 [ 1001.388728] ? __mutex_lock+0x350/0x1310 [ 1001.392779] ? lo_open+0x19/0xb0 [ 1001.396120] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.402258] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.408031] ? exact_match+0x9/0x20 [ 1001.411642] ? kobj_lookup+0x31e/0x400 [ 1001.415509] lo_open+0x19/0xb0 [ 1001.419369] ? loop_unregister_transfer+0x90/0x90 [ 1001.424192] __blkdev_get+0xa8c/0x1090 [ 1001.428583] ? lookup_fast+0x430/0xe30 [ 1001.432452] ? sb_min_blocksize+0x1d0/0x1d0 [ 1001.436748] ? fsnotify+0x974/0x11b0 [ 1001.441157] blkdev_get+0x88/0x890 [ 1001.444697] ? __blkdev_get+0x1090/0x1090 [ 1001.449423] ? lock_downgrade+0x740/0x740 [ 1001.453552] ? do_raw_spin_unlock+0x164/0x220 [ 1001.458620] ? _raw_spin_unlock+0x29/0x40 [ 1001.462841] blkdev_open+0x1cc/0x250 [ 1001.466529] ? security_file_open+0x82/0x190 [ 1001.471608] do_dentry_open+0x44b/0xec0 [ 1001.475566] ? blkdev_get_by_dev+0x70/0x70 [ 1001.480283] vfs_open+0x105/0x220 [ 1001.483731] path_openat+0x628/0x2970 [ 1001.488047] ? path_lookupat+0x780/0x780 [ 1001.492092] ? trace_hardirqs_on+0x10/0x10 [ 1001.496302] do_filp_open+0x179/0x3c0 [ 1001.500778] ? may_open_dev+0xe0/0xe0 [ 1001.504610] ? lock_downgrade+0x740/0x740 [ 1001.509230] ? do_raw_spin_unlock+0x164/0x220 [ 1001.513712] ? _raw_spin_unlock+0x29/0x40 [ 1001.518377] ? __alloc_fd+0x1be/0x490 [ 1001.522162] do_sys_open+0x296/0x410 [ 1001.525868] ? filp_open+0x60/0x60 [ 1001.530098] ? do_syscall_64+0x4c/0x640 [ 1001.534052] ? do_sys_open+0x410/0x410 [ 1001.539043] do_syscall_64+0x1d5/0x640 [ 1001.542933] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.548577] RIP: 0033:0x7fef31511840 [ 1001.552271] RSP: 002b:00007ffe719b4768 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 1001.560465] RAX: ffffffffffffffda RBX: 0000562ddbb8f710 RCX: 00007fef31511840 [ 1001.568033] RDX: 0000562ddb3c1fe3 RSI: 0000000000080000 RDI: 0000562ddbb919b0 [ 1001.575285] RBP: 0000000000000001 R08: 0000562ddb3c1670 R09: 0000000000000110 [ 1001.583122] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 1001.590757] R13: 0000000000000000 R14: 0000562ddbb82230 R15: 00000000ffffffff [ 1001.598361] INFO: task syz-executor120:9708 blocked for more than 140 seconds. [ 1001.605707] Not tainted 4.14.290-syzkaller #0 [ 1001.611194] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.619445] syz-executor120 D28536 9708 8044 0x00000004 [ 1001.625056] Call Trace: [ 1001.628140] __schedule+0x88b/0x1de0 [ 1001.631839] ? io_schedule_timeout+0x140/0x140 [ 1001.636403] ? lock_downgrade+0x740/0x740 [ 1001.641213] schedule+0x8d/0x1b0 [ 1001.644565] schedule_preempt_disabled+0xf/0x20 [ 1001.649793] __mutex_lock+0x669/0x1310 [ 1001.653671] ? blkdev_reread_part+0x1b/0x40 [ 1001.658588] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.664019] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1001.669642] ? __wake_up_common+0x5d0/0x5d0 [ 1001.673961] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 1001.679575] blkdev_reread_part+0x1b/0x40 [ 1001.683707] loop_set_status+0xeeb/0x12b0 [ 1001.688348] loop_set_status64+0x92/0xe0 [ 1001.692391] ? loop_set_status_old+0x200/0x200 [ 1001.696957] ? __mutex_lock+0x360/0x1310 [ 1001.701713] ? wait_for_completion_io+0x10/0x10 [ 1001.706360] ? set_blocksize+0x125/0x380 [ 1001.710912] lo_ioctl+0x587/0x1cd0 [ 1001.714432] ? loop_set_status64+0xe0/0xe0 [ 1001.719139] blkdev_ioctl+0x540/0x1830 [ 1001.723009] ? blkpg_ioctl+0x8d0/0x8d0 [ 1001.726874] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 1001.732679] ? debug_check_no_obj_freed+0x2c0/0x680 [ 1001.737988] block_ioctl+0xd9/0x120 [ 1001.741595] ? blkdev_fallocate+0x3a0/0x3a0 [ 1001.745890] do_vfs_ioctl+0x75a/0xff0 [ 1001.750920] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 1001.756352] ? ioctl_preallocate+0x1a0/0x1a0 [ 1001.761235] ? kmem_cache_free+0x23a/0x2b0 [ 1001.765451] ? putname+0xcd/0x110 [ 1001.769387] ? do_sys_open+0x208/0x410 [ 1001.773255] ? filp_open+0x60/0x60 [ 1001.776774] ? security_file_ioctl+0x83/0xb0 [ 1001.781886] SyS_ioctl+0x7f/0xb0 [ 1001.785234] ? do_vfs_ioctl+0xff0/0xff0 [ 1001.789705] do_syscall_64+0x1d5/0x640 [ 1001.793580] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.799241] RIP: 0033:0x7fb78e909ff7 [ 1001.802936] RSP: 002b:00007ffe87bf2848 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 [ 1001.811142] RAX: ffffffffffffffda RBX: 00007ffe87bf2870 RCX: 00007fb78e909ff7 [ 1001.818723] RDX: 00007ffe87bf2980 RSI: 0000000000004c04 RDI: 0000000000000005 [ 1001.825972] RBP: 0000000000000005 R08: 00007ffe87bf26e0 R09: 00000000fbad8001 [ 1001.833736] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004 [ 1001.841297] R13: 00005555562a82c0 R14: 00007ffe87bf2980 R15: 00007ffe87bf2ac0 [ 1001.848933] INFO: task syz-executor120:9719 blocked for more than 140 seconds. [ 1001.856283] Not tainted 4.14.290-syzkaller #0 [ 1001.861840] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1001.870186] syz-executor120 D28912 9719 8047 0x00000004 [ 1001.875793] Call Trace: [ 1001.878864] __schedule+0x88b/0x1de0 [ 1001.882563] ? io_schedule_timeout+0x140/0x140 [ 1001.887630] ? lock_downgrade+0x740/0x740 [ 1001.891762] schedule+0x8d/0x1b0 [ 1001.895105] schedule_preempt_disabled+0xf/0x20 [ 1001.900418] __mutex_lock+0x669/0x1310 [ 1001.904288] ? loop_control_ioctl+0x67/0x3f0 [ 1001.909192] ? tlb_flush_mmu_free+0x1a0/0x1a0 [ 1001.913680] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1001.919628] ? do_wp_page+0x24d/0x1db0 [ 1001.923517] ? finish_mkwrite_fault+0x5e0/0x5e0 [ 1001.928665] loop_control_ioctl+0x67/0x3f0 [ 1001.932882] ? loop_lookup+0x190/0x190 [ 1001.936751] ? vm_insert_page+0x7c0/0x7c0 [ 1001.942172] ? loop_lookup+0x190/0x190 [ 1001.946043] do_vfs_ioctl+0x75a/0xff0 [ 1001.950302] ? ioctl_preallocate+0x1a0/0x1a0 [ 1001.954694] ? lock_downgrade+0x740/0x740 [ 1001.959410] ? security_file_ioctl+0x83/0xb0 [ 1001.963804] SyS_ioctl+0x7f/0xb0 [ 1001.967936] ? do_vfs_ioctl+0xff0/0xff0 [ 1001.971909] do_syscall_64+0x1d5/0x640 [ 1001.975788] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1001.981642] RIP: 0033:0x7fb78e90a149 [ 1001.985337] RSP: 002b:00007ffe87bf2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1001.993549] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fb78e90a149 [ 1002.001119] RDX: 0000000000000000 RSI: 0000000000004c82 RDI: 0000000000000003 [ 1002.008673] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.015926] R10: 00007ffe87bf2520 R11: 0000000000000246 R12: 00000000000bdcd3 [ 1002.023746] R13: 00007ffe87bf2ad0 R14: 00007ffe87bf2abc R15: 00007ffe87bf2ac0 [ 1002.031353] INFO: task syz-executor120:9722 blocked for more than 140 seconds. [ 1002.039380] Not tainted 4.14.290-syzkaller #0 [ 1002.044378] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.052815] syz-executor120 D28912 9722 8045 0x00000004 [ 1002.058738] Call Trace: [ 1002.061313] __schedule+0x88b/0x1de0 [ 1002.065001] ? io_schedule_timeout+0x140/0x140 [ 1002.070354] ? lock_downgrade+0x740/0x740 [ 1002.074486] schedule+0x8d/0x1b0 [ 1002.078428] schedule_preempt_disabled+0xf/0x20 [ 1002.083161] __mutex_lock+0x669/0x1310 [ 1002.087544] ? loop_control_ioctl+0x67/0x3f0 [ 1002.091933] ? tlb_flush_mmu_free+0x1a0/0x1a0 [ 1002.096402] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.102500] ? do_wp_page+0x24d/0x1db0 [ 1002.106379] ? finish_mkwrite_fault+0x5e0/0x5e0 [ 1002.111644] loop_control_ioctl+0x67/0x3f0 [ 1002.115862] ? loop_lookup+0x190/0x190 [ 1002.120252] ? vm_insert_page+0x7c0/0x7c0 [ 1002.124382] ? loop_lookup+0x190/0x190 [ 1002.129366] do_vfs_ioctl+0x75a/0xff0 [ 1002.133153] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.138048] ? lock_downgrade+0x740/0x740 [ 1002.142182] ? security_file_ioctl+0x83/0xb0 [ 1002.146567] SyS_ioctl+0x7f/0xb0 [ 1002.150642] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.154603] do_syscall_64+0x1d5/0x640 [ 1002.158975] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.164146] RIP: 0033:0x7fb78e90a149 [ 1002.168342] RSP: 002b:00007ffe87bf2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.176036] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fb78e90a149 [ 1002.183820] RDX: 0000000000000000 RSI: 0000000000004c82 RDI: 0000000000000003 [ 1002.191417] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.198979] R10: 00007ffe87bf2520 R11: 0000000000000246 R12: 00000000000bdd48 [ 1002.206231] R13: 00007ffe87bf2ad0 R14: 00007ffe87bf2abc R15: 00007ffe87bf2ac0 [ 1002.214069] INFO: task syz-executor120:9723 blocked for more than 140 seconds. [ 1002.222099] Not tainted 4.14.290-syzkaller #0 [ 1002.227399] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.235348] syz-executor120 D28912 9723 8046 0x00000004 [ 1002.241494] Call Trace: [ 1002.244070] __schedule+0x88b/0x1de0 [ 1002.248251] ? io_schedule_timeout+0x140/0x140 [ 1002.252824] ? lock_downgrade+0x740/0x740 [ 1002.257487] schedule+0x8d/0x1b0 [ 1002.260848] schedule_preempt_disabled+0xf/0x20 [ 1002.265489] __mutex_lock+0x669/0x1310 [ 1002.270082] ? loop_control_ioctl+0x181/0x3f0 [ 1002.274561] ? lock_downgrade+0x740/0x740 [ 1002.279309] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.284752] ? loop_queue_work+0x21e0/0x21e0 [ 1002.289832] loop_control_ioctl+0x181/0x3f0 [ 1002.294133] ? loop_lookup+0x190/0x190 [ 1002.298508] ? vm_insert_page+0x7c0/0x7c0 [ 1002.302657] ? putname+0xcd/0x110 [ 1002.306087] ? loop_lookup+0x190/0x190 [ 1002.310654] do_vfs_ioctl+0x75a/0xff0 [ 1002.314437] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.320033] ? lock_downgrade+0x740/0x740 [ 1002.324169] ? security_file_ioctl+0x83/0xb0 [ 1002.329085] SyS_ioctl+0x7f/0xb0 [ 1002.332438] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.336405] do_syscall_64+0x1d5/0x640 [ 1002.340942] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.346131] RIP: 0033:0x7fb78e90a149 [ 1002.350332] RSP: 002b:00007ffe87bf2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.358345] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fb78e90a149 [ 1002.365603] RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003 [ 1002.373433] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.381043] R10: 000000000000000d R11: 0000000000000246 R12: 00000000000bdd21 [ 1002.388671] R13: 00007ffe87bf2ad0 R14: 00007ffe87bf2abc R15: 00007ffe87bf2ac0 [ 1002.395954] INFO: task syz-executor120:9724 blocked for more than 140 seconds. [ 1002.404126] Not tainted 4.14.290-syzkaller #0 [ 1002.409435] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.417711] syz-executor120 D28912 9724 8048 0x00000004 [ 1002.423326] Call Trace: [ 1002.425893] __schedule+0x88b/0x1de0 [ 1002.430319] ? io_schedule_timeout+0x140/0x140 [ 1002.434884] ? lock_downgrade+0x740/0x740 [ 1002.439509] schedule+0x8d/0x1b0 [ 1002.442857] schedule_preempt_disabled+0xf/0x20 [ 1002.448041] __mutex_lock+0x669/0x1310 [ 1002.451919] ? loop_control_ioctl+0x67/0x3f0 [ 1002.456300] ? tlb_flush_mmu_free+0x1a0/0x1a0 [ 1002.461447] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.467305] ? do_wp_page+0x24d/0x1db0 [ 1002.471198] ? finish_mkwrite_fault+0x5e0/0x5e0 [ 1002.475847] loop_control_ioctl+0x67/0x3f0 [ 1002.480752] ? loop_lookup+0x190/0x190 [ 1002.484987] ? vm_insert_page+0x7c0/0x7c0 [ 1002.489643] ? loop_lookup+0x190/0x190 [ 1002.493514] do_vfs_ioctl+0x75a/0xff0 [ 1002.497903] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.502291] ? lock_downgrade+0x740/0x740 [ 1002.506417] ? security_file_ioctl+0x83/0xb0 [ 1002.512083] SyS_ioctl+0x7f/0xb0 [ 1002.515435] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.519858] do_syscall_64+0x1d5/0x640 [ 1002.523729] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.529392] RIP: 0033:0x7fb78e90a149 [ 1002.533083] RSP: 002b:00007ffe87bf2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.541284] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fb78e90a149 [ 1002.548842] RDX: 0000000000000000 RSI: 0000000000004c82 RDI: 0000000000000003 [ 1002.556093] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.563849] R10: 00007ffe87bf2520 R11: 0000000000000246 R12: 00000000000bdd90 [ 1002.571440] R13: 00007ffe87bf2ad0 R14: 00007ffe87bf2abc R15: 00007ffe87bf2ac0 [ 1002.579013] INFO: task syz-executor120:9726 blocked for more than 140 seconds. [ 1002.586357] Not tainted 4.14.290-syzkaller #0 [ 1002.592076] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1002.600331] syz-executor120 D28912 9726 8049 0x00000004 [ 1002.605941] Call Trace: [ 1002.609085] __schedule+0x88b/0x1de0 [ 1002.612786] ? io_schedule_timeout+0x140/0x140 [ 1002.617844] ? lock_downgrade+0x740/0x740 [ 1002.621978] schedule+0x8d/0x1b0 [ 1002.625318] schedule_preempt_disabled+0xf/0x20 [ 1002.630665] __mutex_lock+0x669/0x1310 [ 1002.634536] ? loop_control_ioctl+0x67/0x3f0 [ 1002.639528] ? tlb_flush_mmu_free+0x1a0/0x1a0 [ 1002.644006] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1002.649976] ? do_wp_page+0x24d/0x1db0 [ 1002.653853] ? finish_mkwrite_fault+0x5e0/0x5e0 [ 1002.659005] loop_control_ioctl+0x67/0x3f0 [ 1002.663224] ? loop_lookup+0x190/0x190 [ 1002.667615] ? vm_insert_page+0x7c0/0x7c0 [ 1002.671748] ? loop_lookup+0x190/0x190 [ 1002.675624] do_vfs_ioctl+0x75a/0xff0 [ 1002.680107] ? ioctl_preallocate+0x1a0/0x1a0 [ 1002.684507] ? lock_downgrade+0x740/0x740 [ 1002.689213] ? security_file_ioctl+0x83/0xb0 [ 1002.693604] SyS_ioctl+0x7f/0xb0 [ 1002.697477] ? do_vfs_ioctl+0xff0/0xff0 [ 1002.701436] do_syscall_64+0x1d5/0x640 [ 1002.705299] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1002.711878] RIP: 0033:0x7fb78e90a149 [ 1002.715566] RSP: 002b:00007ffe87bf2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1002.723760] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007fb78e90a149 [ 1002.731367] RDX: 0000000000000000 RSI: 0000000000004c82 RDI: 0000000000000003 [ 1002.738932] RBP: 0000000000000000 R08: 000000000000000d R09: 000000000000000d [ 1002.746189] R10: 00007ffe87bf2520 R11: 0000000000000246 R12: 00000000000bdd94 [ 1002.753995] R13: 00007ffe87bf2ad0 R14: 00007ffe87bf2abc R15: 00007ffe87bf2ac0 [ 1002.761621] [ 1002.761621] Showing all locks held in the system: [ 1002.768762] 1 lock held by khungtaskd/1534: [ 1002.773122] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1002.782233] 2 locks held by systemd-udevd/8153: [ 1002.786993] #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x191/0x1090 [ 1002.795648] #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x19/0xb0 [ 1002.803730] 2 locks held by syz-executor120/9708: [ 1002.808588] #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x87/0x1cd0 [ 1002.817204] #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1b/0x40 [ 1002.826136] 1 lock held by syz-executor120/9719: [ 1002.830916] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1002.840055] 1 lock held by syz-executor120/9722: [ 1002.844789] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1002.853911] 2 locks held by syz-executor120/9723: [ 1002.858772] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1002.867903] #1: (&lo->lo_ctl_mutex){+.+.}, at: [] loop_control_ioctl+0x181/0x3f0 [ 1002.877224] 1 lock held by syz-executor120/9724: [ 1002.881960] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1002.891090] 1 lock held by syz-executor120/9726: [ 1002.895827] #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x67/0x3f0 [ 1002.904952] [ 1002.906564] ============================================= [ 1002.906564] [ 1002.913859] NMI backtrace for cpu 1 [ 1002.917528] CPU: 1 PID: 1534 Comm: khungtaskd Not tainted 4.14.290-syzkaller #0 [ 1002.924953] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 1002.934278] Call Trace: [ 1002.936852] dump_stack+0x1b2/0x281 [ 1002.940470] nmi_cpu_backtrace.cold+0x57/0x93 [ 1002.944938] ? irq_force_complete_move+0x350/0x350 [ 1002.949840] nmi_trigger_cpumask_backtrace+0x13a/0x180 [ 1002.955186] watchdog+0x5b9/0xb40 [ 1002.958613] ? hungtask_pm_notify+0x50/0x50 [ 1002.962912] kthread+0x30d/0x420 [ 1002.966252] ? kthread_create_on_node+0xd0/0xd0 [ 1002.970997] ret_from_fork+0x24/0x30 [ 1002.974860] Sending NMI from CPU 1 to CPUs 0: [ 1002.979410] NMI backtrace for cpu 0 skipped: idling at pc 0xffffffff8723f20e [ 1002.980874] Kernel panic - not syncing: hung_task: blocked tasks [ 1002.992737] CPU: 1 PID: 1534 Comm: khungtaskd Not tainted 4.14.290-syzkaller #0 [ 1003.000167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 1003.009493] Call Trace: [ 1003.012072] dump_stack+0x1b2/0x281 [ 1003.015676] panic+0x1f9/0x42d [ 1003.018843] ? add_taint.cold+0x16/0x16 [ 1003.022798] watchdog+0x5ca/0xb40 [ 1003.026225] ? hungtask_pm_notify+0x50/0x50 [ 1003.030519] kthread+0x30d/0x420 [ 1003.033860] ? kthread_create_on_node+0xd0/0xd0 [ 1003.038504] ret_from_fork+0x24/0x30 [ 1003.042457] Kernel Offset: disabled [ 1003.046068] Rebooting in 86400 seconds..