Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 489.994093] block nbd0: shutting down sockets [ 717.581317] INFO: task syz-executor392:8164 blocked for more than 140 seconds. [ 717.588858] Not tainted 4.19.166-syzkaller #0 [ 717.593956] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.601992] syz-executor392 D28160 8164 8163 0x80000006 [ 717.607619] Call Trace: [ 717.610219] __schedule+0x887/0x2040 [ 717.614009] ? io_schedule_timeout+0x140/0x140 [ 717.618614] ? lock_downgrade+0x720/0x720 [ 717.622810] ? __mutex_lock+0x458/0x1260 [ 717.626881] schedule+0x8d/0x1b0 [ 717.630234] schedule_preempt_disabled+0xf/0x20 [ 717.634975] __mutex_lock+0x647/0x1260 [ 717.638962] ? blkdev_put+0x30/0x520 [ 717.642716] ? __mutex_add_waiter+0x160/0x160 [ 717.647211] ? lock_downgrade+0x720/0x720 [ 717.651419] ? locks_remove_file+0x286/0x450 [ 717.655867] ? locks_check_ctx_file_list+0x1d/0x110 [ 717.660869] ? _raw_spin_unlock+0x29/0x40 [ 717.665060] ? locks_remove_file+0x2cd/0x450 [ 717.669467] ? blkdev_put+0x520/0x520 [ 717.673364] blkdev_put+0x30/0x520 [ 717.676930] ? blkdev_put+0x520/0x520 [ 717.680728] blkdev_close+0x86/0xb0 [ 717.684393] __fput+0x2ce/0x890 [ 717.687696] task_work_run+0x148/0x1c0 [ 717.691640] do_exit+0xbed/0x2be0 [ 717.695094] ? mm_update_next_owner+0x650/0x650 [ 717.699747] ? get_signal+0x388/0x1f70 [ 717.703672] ? lock_downgrade+0x720/0x720 [ 717.707838] ? lock_acquire+0x170/0x3c0 [ 717.712053] do_group_exit+0x125/0x310 [ 717.715949] get_signal+0x3f2/0x1f70 [ 717.719654] do_signal+0x8f/0x1670 [ 717.723236] ? block_ioctl+0xe9/0x130 [ 717.727034] ? blkdev_fallocate+0x3f0/0x3f0 [ 717.731424] ? do_vfs_ioctl+0x110/0x12e0 [ 717.735483] ? setup_sigcontext+0x820/0x820 [ 717.739810] ? debug_check_no_obj_freed+0x201/0x482 [ 717.744864] ? ioctl_preallocate+0x200/0x200 [ 717.749289] ? putname+0xe1/0x120 [ 717.752827] ? putname+0xe1/0x120 [ 717.756282] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 717.761447] ? kmem_cache_free+0x226/0x260 [ 717.765681] ? putname+0xe1/0x120 [ 717.769119] ? do_sys_open+0x2bf/0x520 [ 717.773055] ? filp_open+0x70/0x70 [ 717.776596] ? exit_to_usermode_loop+0x36/0x2a0 [ 717.781303] exit_to_usermode_loop+0x204/0x2a0 [ 717.785888] do_syscall_64+0x538/0x620 [ 717.789761] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.795023] RIP: 0033:0x445089 [ 717.798222] Code: Bad RIP value. [ 717.801623] RSP: 002b:00007fff7c04c568 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 717.809364] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000445089 [ 717.816705] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000008 [ 717.824051] RBP: 00000000006d0018 R08: 00000000004002e0 R09: 00000000004002e0 [ 717.831401] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000402250 [ 717.838664] R13: 00000000004022e0 R14: 0000000000000000 R15: 0000000000000000 [ 717.846013] INFO: task systemd-udevd:8167 blocked for more than 140 seconds. [ 717.853262] Not tainted 4.19.166-syzkaller #0 [ 717.858261] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.866265] systemd-udevd D26624 8167 4696 0x00000104 [ 717.871963] Call Trace: [ 717.874551] __schedule+0x887/0x2040 [ 717.878253] ? io_schedule_timeout+0x140/0x140 [ 717.882880] schedule+0x8d/0x1b0 [ 717.886260] io_schedule+0xb5/0x120 [ 717.889888] wait_on_page_bit+0x2c5/0x3f0 [ 717.894093] ? wake_page_function+0x1b0/0x1b0 [ 717.898587] ? __bread_gfp+0x300/0x300 [ 717.902833] ? add_to_page_cache_lru+0x680/0x680 [ 717.907614] do_read_cache_page+0x8ed/0x1170 [ 717.912085] ? blkdev_writepages+0x20/0x20 [ 717.916317] read_dev_sector+0xbf/0x500 [ 717.920283] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 717.924903] adfspart_check_ICS+0x114/0xe70 [ 717.929224] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 717.933860] ? snprintf+0xbb/0xf0 [ 717.937305] ? vsprintf+0x30/0x30 [ 717.940739] ? _raw_spin_unlock+0x29/0x40 [ 717.944919] ? __get_vm_area_node+0x2e2/0x3a0 [ 717.949416] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 717.954077] check_partition+0x390/0x68e [ 717.958137] rescan_partitions+0x1b5/0x970 [ 717.962407] ? nbd_open+0x4cc/0x6f0 [ 717.966046] ? nbd_add_socket+0x6f0/0x6f0 [ 717.970179] bdev_disk_changed+0x179/0x1b0 [ 717.974470] __blkdev_get+0x1282/0x1480 [ 717.978445] ? bdev_disk_changed+0x1b0/0x1b0 [ 717.982942] ? mark_held_locks+0xf0/0xf0 [ 717.987008] ? mark_held_locks+0xf0/0xf0 [ 717.991567] blkdev_get+0xb0/0x940 [ 717.995365] ? bd_acquire+0x245/0x440 [ 717.999148] ? __blkdev_get+0x1480/0x1480 [ 718.003326] ? lock_downgrade+0x720/0x720 [ 718.007476] ? lock_acquire+0x170/0x3c0 [ 718.011503] ? bd_acquire+0x21/0x440 [ 718.015221] ? do_raw_spin_unlock+0x171/0x230 [ 718.019725] blkdev_open+0x202/0x290 [ 718.023479] do_dentry_open+0x4aa/0x1160 [ 718.027539] ? blkdev_get_by_dev+0x70/0x70 [ 718.031829] ? chown_common+0x550/0x550 [ 718.035815] ? inode_permission+0x3d/0x140 [ 718.040033] path_openat+0x793/0x2df0 [ 718.043880] ? path_lookupat+0x8d0/0x8d0 [ 718.047959] ? __put_seccomp_filter+0xa0/0xa0 [ 718.052516] ? mark_held_locks+0xf0/0xf0 [ 718.056595] do_filp_open+0x18c/0x3f0 [ 718.060465] ? may_open_dev+0xf0/0xf0 [ 718.064326] ? lock_downgrade+0x720/0x720 [ 718.068473] ? lock_acquire+0x170/0x3c0 [ 718.072517] ? __alloc_fd+0x34/0x570 [ 718.076258] ? do_raw_spin_unlock+0x171/0x230 [ 718.080751] ? _raw_spin_unlock+0x29/0x40 [ 718.084975] ? __alloc_fd+0x28d/0x570 [ 718.088798] do_sys_open+0x3b3/0x520 [ 718.092618] ? filp_open+0x70/0x70 [ 718.096180] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.101597] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.106614] ? do_syscall_64+0x21/0x620 [ 718.110573] do_syscall_64+0xf9/0x620 [ 718.114429] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.119629] RIP: 0033:0x7fea3b268840 [ 718.123403] Code: Bad RIP value. [ 718.126759] RSP: 002b:00007ffe2646f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.134536] RAX: ffffffffffffffda RBX: 0000563936965170 RCX: 00007fea3b268840 [ 718.141880] RDX: 000056393596afe3 RSI: 00000000000a0800 RDI: 000056393695e110 [ 718.149158] RBP: 00007ffe2646f930 R08: 000056393596a670 R09: 0000000000000010 [ 718.156482] R10: 000056393596ad0c R11: 0000000000000246 R12: 00007ffe2646f880 [ 718.163799] R13: 00005639369675e0 R14: 0000000000000003 R15: 000000000000000e [ 718.171102] [ 718.171102] Showing all locks held in the system: [ 718.177498] 1 lock held by khungtaskd/1561: [ 718.181869] #0: 00000000f818cd35 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 718.190504] 1 lock held by in:imklog/7833: [ 718.194796] 1 lock held by syz-executor392/8164: [ 718.199546] #0: 000000005df7a45a (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x30/0x520 [ 718.207476] 1 lock held by systemd-udevd/8167: [ 718.212113] #0: 000000005df7a45a (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 [ 718.220341] [ 718.222014] ============================================= [ 718.222014] [ 718.229035] NMI backtrace for cpu 1 [ 718.232717] CPU: 1 PID: 1561 Comm: khungtaskd Not tainted 4.19.166-syzkaller #0 [ 718.240155] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.249503] Call Trace: [ 718.252091] dump_stack+0x1fc/0x2fe [ 718.255703] nmi_cpu_backtrace.cold+0x63/0xa2 [ 718.260195] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 718.265106] nmi_trigger_cpumask_backtrace+0x1a6/0x1eb [ 718.270365] watchdog+0x991/0xe60 [ 718.273808] ? reset_hung_task_detector+0x30/0x30 [ 718.278633] kthread+0x33f/0x460 [ 718.281981] ? kthread_park+0x180/0x180 [ 718.285948] ret_from_fork+0x24/0x30 [ 718.289751] Sending NMI from CPU 1 to CPUs 0: [ 718.295012] NMI backtrace for cpu 0 [ 718.295018] CPU: 0 PID: 4691 Comm: systemd-journal Not tainted 4.19.166-syzkaller #0 [ 718.295023] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.295027] RIP: 0010:get_page_from_freelist+0x1c1f/0x4170 [ 718.295037] Code: 49 83 c4 40 39 eb 0f 8e ea 08 00 00 4d 8d 6c 24 30 be 04 00 00 00 4c 89 ef e8 bd 5b 19 00 4c 89 e8 48 c1 e8 03 42 0f b6 14 38 <4c> 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 cc 1e 00 00 41 [ 718.295040] RSP: 0018:ffff8880a0c8f940 EFLAGS: 00000802 [ 718.295047] RAX: 1ffffd40004a65ce RBX: 0000000000000002 RCX: ffffffff81818a53 [ 718.295051] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0002532e70 [ 718.295056] RBP: 0000000000000001 R08: 0000000000000000 R09: fffff940004a65ce [ 718.295060] R10: ffffea0002532e73 R11: 0000000000000000 R12: ffffea0002532e40 [ 718.295065] R13: ffffea0002532e70 R14: ffffea0002532e34 R15: dffffc0000000000 [ 718.295070] FS: 00007fb5c92d38c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 718.295073] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 718.295078] CR2: 00007fb5c66b1000 CR3: 00000000a1082000 CR4: 00000000001406f0 [ 718.295082] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 718.295087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 718.295089] Call Trace: [ 718.295092] ? kmem_cache_free+0x7f/0x260 [ 718.295095] ? should_fail+0x142/0x7b0 [ 718.295098] ? __zone_watermark_ok+0x300/0x300 [ 718.295102] ? __bpf_prog_run32+0x8f/0xd0 [ 718.295105] __alloc_pages_nodemask+0x387/0x2890 [ 718.295108] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 718.295112] ? check_preemption_disabled+0x41/0x280 [ 718.295115] ? __lock_acquire+0x6de/0x3ff0 [ 718.295118] ? seccomp_run_filters+0x18c/0x590 [ 718.295122] ? gfp_pfmemalloc_allowed+0x150/0x150 [ 718.295125] ? __put_seccomp_filter+0xa0/0xa0 [ 718.295129] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 718.295132] ? __seccomp_filter+0xe4/0xca0 [ 718.295135] cache_grow_begin+0xa4/0x8a0 [ 718.295138] ? cache_alloc_pfmemalloc+0x1e/0x140 [ 718.295141] cache_alloc_refill+0x273/0x340 [ 718.295145] kmem_cache_alloc+0x346/0x370 [ 718.295148] getname_flags+0xce/0x590 [ 718.295151] do_sys_open+0x26c/0x520 [ 718.295153] ? filp_open+0x70/0x70 [ 718.295157] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 718.295161] ? trace_hardirqs_off_caller+0x6e/0x210 [ 718.295164] ? do_syscall_64+0x21/0x620 [ 718.295167] do_syscall_64+0xf9/0x620 [ 718.295170] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 718.295173] RIP: 0033:0x7fb5c8863840 [ 718.295183] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 718.295186] RSP: 002b:00007fff95352ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 718.295193] RAX: ffffffffffffffda RBX: 00007fff95352df0 RCX: 00007fb5c8863840 [ 718.295198] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000555cc140ade0 [ 718.295202] RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff [ 718.295207] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 718.295211] R13: 0000555cc13ff040 R14: 00007fff95352db0 R15: 0000555cc140b090 [ 718.295298] Kernel panic - not syncing: hung_task: blocked tasks [ 718.603565] CPU: 1 PID: 1561 Comm: khungtaskd Not tainted 4.19.166-syzkaller #0 [ 718.611001] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 718.620341] Call Trace: [ 718.622921] dump_stack+0x1fc/0x2fe [ 718.626594] panic+0x26a/0x50e [ 718.629781] ? __warn_printk+0xf3/0xf3 [ 718.633655] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 718.638741] ? cpumask_next+0x3c/0x40 [ 718.642524] ? printk_safe_flush+0xd6/0x120 [ 718.646825] ? watchdog+0x991/0xe60 [ 718.650533] ? nmi_trigger_cpumask_backtrace+0x15e/0x1eb [ 718.655966] watchdog+0x9a2/0xe60 [ 718.659403] ? reset_hung_task_detector+0x30/0x30 [ 718.664232] kthread+0x33f/0x460 [ 718.667577] ? kthread_park+0x180/0x180 [ 718.671554] ret_from_fork+0x24/0x30 [ 718.676054] Kernel Offset: disabled [ 718.679672] Rebooting in 86400 seconds..