Warning: Permanently added '10.128.0.122' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 542.343746] block nbd0: shutting down sockets [ 567.816114] block nbd0: Connection timed out [ 567.816191] print_req_error: I/O error, dev nbd0, sector 0 [ 567.826655] Buffer I/O error on dev nbd0, logical block 0, async page read [ 567.833777] block nbd0: Connection timed out [ 567.838324] print_req_error: I/O error, dev nbd0, sector 2 [ 567.843970] Buffer I/O error on dev nbd0, logical block 1, async page read [ 567.851139] block nbd0: Connection timed out [ 567.855740] print_req_error: I/O error, dev nbd0, sector 4 [ 567.862715] Buffer I/O error on dev nbd0, logical block 2, async page read [ 567.869898] block nbd0: Connection timed out [ 567.874315] print_req_error: I/O error, dev nbd0, sector 6 [ 567.880032] Buffer I/O error on dev nbd0, logical block 3, async page read [ 567.887717] print_req_error: I/O error, dev nbd0, sector 0 [ 567.893457] Buffer I/O error on dev nbd0, logical block 0, async page read [ 567.900649] print_req_error: I/O error, dev nbd0, sector 2 [ 567.906403] Buffer I/O error on dev nbd0, logical block 1, async page read [ 567.913568] Buffer I/O error on dev nbd0, logical block 2, async page read [ 567.920734] Buffer I/O error on dev nbd0, logical block 3, async page read [ 567.928323] print_req_error: I/O error, dev nbd0, sector 0 [ 567.933974] Buffer I/O error on dev nbd0, logical block 0, async page read [ 567.941177] print_req_error: I/O error, dev nbd0, sector 2 [ 567.946894] Buffer I/O error on dev nbd0, logical block 1, async page read [ 567.954078] print_req_error: I/O error, dev nbd0, sector 0 [ 567.959780] print_req_error: I/O error, dev nbd0, sector 2 executing program [ 567.966958] ldm_validate_partition_table(): Disk read failed. [ 567.973951] Dev nbd0: unable to read RDB block 0 [ 567.980416] nbd0: unable to read partition table [ 567.991910] ldm_validate_partition_table(): Disk read failed. [ 567.999076] Dev nbd0: unable to read RDB block 0 [ 568.006902] nbd0: unable to read partition table [ 568.015042] ldm_validate_partition_table(): Disk read failed. [ 568.022169] Dev nbd0: unable to read RDB block 0 [ 568.028452] nbd0: unable to read partition table [ 568.033742] block nbd0: Device being setup by another task [ 568.045778] ldm_validate_partition_table(): Disk read failed. [ 568.053107] Dev nbd0: unable to read RDB block 0 [ 568.059383] nbd0: unable to read partition table [ 568.068148] ldm_validate_partition_table(): Disk read failed. [ 568.075091] Dev nbd0: unable to read RDB block 0 [ 568.081968] nbd0: unable to read partition table [ 568.090444] ldm_validate_partition_table(): Disk read failed. [ 568.097623] Dev nbd0: unable to read RDB block 0 [ 568.103400] nbd0: unable to read partition table [ 568.111757] ldm_validate_partition_table(): Disk read failed. executing program [ 568.118695] Dev nbd0: unable to read RDB block 0 [ 568.124469] nbd0: unable to read partition table [ 573.130978] block nbd0: shutting down sockets [ 720.136000] INFO: task systemd-udevd:8130 blocked for more than 140 seconds. [ 720.143335] Not tainted 4.19.157-syzkaller #0 [ 720.149924] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.157996] systemd-udevd D26224 8130 4699 0x00000100 [ 720.163686] Call Trace: [ 720.166479] __schedule+0x887/0x2040 [ 720.170216] ? io_schedule_timeout+0x140/0x140 [ 720.174795] schedule+0x8d/0x1b0 [ 720.178272] io_schedule+0xb5/0x120 [ 720.181985] wait_on_page_bit+0x2c5/0x3f0 [ 720.186189] ? wake_page_function+0x1b0/0x1b0 [ 720.190762] ? __bread_gfp+0x300/0x300 [ 720.194647] ? add_to_page_cache_lru+0x680/0x680 [ 720.199521] do_read_cache_page+0x8ed/0x1170 [ 720.203979] ? blkdev_writepages+0x20/0x20 [ 720.208381] read_dev_sector+0xbf/0x500 [ 720.212368] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 720.217030] adfspart_check_ICS+0x114/0xe70 [ 720.221359] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 720.226046] ? snprintf+0xbb/0xf0 [ 720.229509] ? vsprintf+0x30/0x30 [ 720.232952] ? _raw_spin_unlock+0x29/0x40 [ 720.237224] ? __get_vm_area_node+0x2e2/0x3a0 [ 720.241734] ? adfspart_check_ADFS+0x8e0/0x8e0 [ 720.246383] check_partition+0x390/0x68e [ 720.250465] rescan_partitions+0x1b5/0x970 [ 720.254778] ? nbd_open+0x4cc/0x6f0 [ 720.258483] ? nbd_add_socket+0x6f0/0x6f0 [ 720.262658] bdev_disk_changed+0x179/0x1b0 [ 720.266954] __blkdev_get+0x1282/0x1480 [ 720.270958] ? bdev_disk_changed+0x1b0/0x1b0 [ 720.275413] ? mark_held_locks+0xf0/0xf0 [ 720.279575] ? mark_held_locks+0xf0/0xf0 [ 720.283645] blkdev_get+0xb0/0x940 [ 720.287241] ? bd_acquire+0x245/0x440 [ 720.291054] ? __blkdev_get+0x1480/0x1480 [ 720.295188] ? lock_downgrade+0x720/0x720 [ 720.299416] ? lock_acquire+0x170/0x3c0 [ 720.303409] ? bd_acquire+0x21/0x440 [ 720.307260] ? do_raw_spin_unlock+0x171/0x230 [ 720.311779] blkdev_open+0x202/0x290 [ 720.315644] do_dentry_open+0x4aa/0x1160 [ 720.319796] ? blkdev_get_by_dev+0x70/0x70 [ 720.324055] ? chown_common+0x550/0x550 [ 720.328141] ? inode_permission+0x3d/0x140 [ 720.332442] path_openat+0x793/0x2df0 [ 720.336322] ? path_lookupat+0x8d0/0x8d0 [ 720.340447] ? __put_seccomp_filter+0xa0/0xa0 [ 720.344933] ? mark_held_locks+0xf0/0xf0 [ 720.349073] do_filp_open+0x18c/0x3f0 [ 720.352971] ? may_open_dev+0xf0/0xf0 [ 720.356858] ? lock_downgrade+0x720/0x720 [ 720.361007] ? lock_acquire+0x170/0x3c0 [ 720.365170] ? __alloc_fd+0x34/0x570 [ 720.369083] ? do_raw_spin_unlock+0x171/0x230 [ 720.373600] ? _raw_spin_unlock+0x29/0x40 [ 720.377941] ? __alloc_fd+0x28d/0x570 [ 720.381762] do_sys_open+0x3b3/0x520 [ 720.385473] ? filp_open+0x70/0x70 [ 720.389111] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 720.395728] ? trace_hardirqs_off_caller+0x6e/0x210 [ 720.400881] ? do_syscall_64+0x21/0x620 [ 720.404874] do_syscall_64+0xf9/0x620 [ 720.408764] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 720.413965] RIP: 0033:0x7f1022416840 [ 720.417763] Code: Bad RIP value. [ 720.421157] RSP: 002b:00007ffc647be578 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 720.428919] RAX: ffffffffffffffda RBX: 000055c7f6f22430 RCX: 00007f1022416840 [ 720.436268] RDX: 000055c7f551dfe3 RSI: 0000000000080000 RDI: 000055c7f6f11400 [ 720.443565] RBP: 0000000000000001 R08: 000055c7f551d670 R09: 0000000000000110 [ 720.450918] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 720.458285] R13: 0000000000000000 R14: 000055c7f6f11240 R15: 00000000ffffffff [ 720.465699] INFO: task syz-executor054:8134 blocked for more than 140 seconds. [ 720.473171] Not tainted 4.19.157-syzkaller #0 [ 720.478267] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.486298] syz-executor054 D27664 8134 8126 0x80000006 [ 720.491957] Call Trace: [ 720.494541] __schedule+0x887/0x2040 [ 720.498338] ? io_schedule_timeout+0x140/0x140 [ 720.502929] ? lock_downgrade+0x720/0x720 [ 720.507219] ? __mutex_lock+0x458/0x1260 [ 720.511296] schedule+0x8d/0x1b0 [ 720.514651] schedule_preempt_disabled+0xf/0x20 [ 720.519398] __mutex_lock+0x647/0x1260 [ 720.523314] ? blkdev_put+0x30/0x520 [ 720.527174] ? __mutex_add_waiter+0x160/0x160 [ 720.531749] ? lock_downgrade+0x720/0x720 [ 720.536083] ? locks_remove_file+0x286/0x450 [ 720.540503] ? locks_check_ctx_file_list+0x1d/0x110 [ 720.545545] ? _raw_spin_unlock+0x29/0x40 [ 720.549869] ? locks_remove_file+0x2cd/0x450 [ 720.554293] ? blkdev_put+0x520/0x520 [ 720.558239] blkdev_put+0x30/0x520 [ 720.561790] ? blkdev_put+0x520/0x520 [ 720.565608] blkdev_close+0x86/0xb0 [ 720.569321] __fput+0x2ce/0x890 [ 720.572717] task_work_run+0x148/0x1c0 [ 720.576798] do_exit+0xbb2/0x2b70 [ 720.580262] ? mm_update_next_owner+0x650/0x650 [ 720.584972] ? get_signal+0x388/0x1f70 [ 720.588931] ? lock_downgrade+0x720/0x720 [ 720.593088] ? lock_acquire+0x170/0x3c0 [ 720.597146] do_group_exit+0x125/0x310 [ 720.601064] get_signal+0x3f2/0x1f70 [ 720.604867] do_signal+0x8f/0x1670 [ 720.608467] ? block_ioctl+0xe9/0x130 [ 720.612273] ? blkdev_fallocate+0x3f0/0x3f0 [ 720.616680] ? do_vfs_ioctl+0x110/0x12e0 [ 720.620765] ? setup_sigcontext+0x820/0x820 [ 720.625129] ? debug_check_no_obj_freed+0x201/0x482 [ 720.630217] ? ioctl_preallocate+0x200/0x200 [ 720.634642] ? putname+0xe1/0x120 [ 720.638533] ? putname+0xe1/0x120 [ 720.642084] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 720.647242] ? kmem_cache_free+0x226/0x260 [ 720.651490] ? putname+0xe1/0x120 [ 720.654949] ? do_sys_open+0x2bf/0x520 [ 720.658943] ? filp_open+0x70/0x70 [ 720.662495] ? exit_to_usermode_loop+0x36/0x2a0 [ 720.667222] exit_to_usermode_loop+0x204/0x2a0 [ 720.671816] do_syscall_64+0x538/0x620 [ 720.675701] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 720.680999] RIP: 0033:0x445039 [ 720.684206] Code: Bad RIP value. [ 720.687622] RSP: 002b:00007ffd7d6bb898 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 720.695337] RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 0000000000445039 [ 720.702685] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000006 [ 720.710035] RBP: 000000000008aab5 R08: 00000000004002e0 R09: 00000000004002e0 [ 720.717384] R10: 000000000000000f R11: 0000000000000246 R12: 0000000000402200 [ 720.724657] R13: 0000000000402290 R14: 0000000000000000 R15: 0000000000000000 [ 720.732043] [ 720.732043] Showing all locks held in the system: [ 720.738457] 1 lock held by khungtaskd/1564: [ 720.742786] #0: 00000000719f7878 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 [ 720.751523] 2 locks held by in:imklog/8005: [ 720.756112] #0: 00000000fd2e1896 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 [ 720.764215] #1: 00000000d03ffc2c (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 [ 720.772300] 1 lock held by systemd-udevd/8130: [ 720.776967] #0: 0000000094477ea0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x1d0/0x1480 [ 720.785653] 1 lock held by syz-executor054/8134: [ 720.791267] #0: 0000000094477ea0 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x30/0x520 [ 720.799261] [ 720.800893] ============================================= [ 720.800893] [ 720.807965] NMI backtrace for cpu 1 [ 720.811615] CPU: 1 PID: 1564 Comm: khungtaskd Not tainted 4.19.157-syzkaller #0 [ 720.819065] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.828427] Call Trace: [ 720.831010] dump_stack+0x1fc/0x2fe [ 720.834633] nmi_cpu_backtrace.cold+0x63/0xa2 [ 720.839172] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 720.844091] nmi_trigger_cpumask_backtrace+0x1a6/0x1eb [ 720.849377] watchdog+0x991/0xe60 [ 720.852817] ? reset_hung_task_detector+0x30/0x30 [ 720.857646] kthread+0x33f/0x460 [ 720.860995] ? kthread_park+0x180/0x180 [ 720.864968] ret_from_fork+0x24/0x30 [ 720.868853] Sending NMI from CPU 1 to CPUs 0: [ 720.873535] NMI backtrace for cpu 0 [ 720.873542] CPU: 0 PID: 4694 Comm: systemd-journal Not tainted 4.19.157-syzkaller #0 [ 720.873548] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.873552] RIP: 0033:0x7fc44a58b160 [ 720.873562] Code: 68 26 00 00 00 e9 80 fd ff ff ff 25 92 f8 1d 00 68 27 00 00 00 e9 70 fd ff ff ff 25 8a f8 1d 00 68 28 00 00 00 e9 60 fd ff ff 25 82 f8 1d 00 68 29 00 00 00 e9 50 fd ff ff ff 25 7a f8 1d 00 [ 720.873567] RSP: 002b:00007ffd6bd8e4d8 EFLAGS: 00000293 [ 720.873575] RAX: 00007fc44a9846c0 RBX: 00007ffd6bd8e7e0 RCX: fffffffffffffe00 [ 720.873580] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055b239f45a40 [ 720.873586] RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff [ 720.873591] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 720.873596] R13: 00000000fffffffe R14: 00007ffd6bd8e7a0 R15: 000055b239f45a40 [ 720.873600] FS: 00007fc44a9848c0 GS: 0000000000000000 [ 720.874477] Kernel panic - not syncing: hung_task: blocked tasks [ 720.971482] CPU: 1 PID: 1564 Comm: khungtaskd Not tainted 4.19.157-syzkaller #0 [ 720.978926] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.988280] Call Trace: [ 720.990872] dump_stack+0x1fc/0x2fe [ 720.994904] panic+0x26a/0x50e [ 720.998096] ? __warn_printk+0xf3/0xf3 [ 721.001998] ? lapic_can_unplug_cpu.cold+0x39/0x39 [ 721.006914] ? ___preempt_schedule+0x16/0x18 [ 721.011333] ? watchdog+0x991/0xe60 [ 721.014981] ? nmi_trigger_cpumask_backtrace+0x15e/0x1eb [ 721.020431] watchdog+0x9a2/0xe60 [ 721.023900] ? reset_hung_task_detector+0x30/0x30 [ 721.028731] kthread+0x33f/0x460 [ 721.032084] ? kthread_park+0x180/0x180 [ 721.036056] ret_from_fork+0x24/0x30 [ 721.040391] Kernel Offset: disabled [ 721.044063] Rebooting in 86400 seconds..