Same thing happen in HyperV, when run apt-get install -yq linux- azure/disco, it hung in some rate. Like upgrade 3 VMs, 1 VM hung.
VM configuration - 3584 memory, 2 Virtual processors [ 485.023123] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 485.029485] Not tainted 5.0.0-15-generic #16-Ubuntu [ 485.034818] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 485.042754] mdadm D 0 11824 11818 0x00000000 [ 485.042758] Call Trace: [ 485.042768] __schedule+0x2d0/0x840 [ 485.042770] ? __switch_to_asm+0x34/0x70 [ 485.042771] ? __switch_to_asm+0x40/0x70 [ 485.042774] schedule+0x2c/0x70 [ 485.042776] schedule_timeout+0x258/0x360 [ 485.042780] wait_for_completion+0xb7/0x140 [ 485.042784] ? wake_up_q+0x80/0x80 [ 485.042790] __floppy_read_block_0+0x138/0x190 [floppy] [ 485.042793] ? floppy_cmos_show+0x30/0x30 [floppy] [ 485.042797] floppy_revalidate+0xf8/0x230 [floppy] [ 485.042800] check_disk_change+0x62/0x70 [ 485.042803] floppy_open+0x2ae/0x380 [floppy] [ 485.042805] __blkdev_get+0xe5/0x550 [ 485.042807] ? bd_acquire+0xd0/0xd0 [ 485.042809] blkdev_get+0x10c/0x330 [ 485.042811] ? bd_acquire+0xd0/0xd0 [ 485.042812] blkdev_open+0x92/0x100 [ 485.042815] do_dentry_open+0x143/0x3a0 [ 485.042818] vfs_open+0x2d/0x30 [ 485.042820] path_openat+0x2d4/0x16d0 [ 485.042825] ? put_device+0x17/0x20 [ 485.042828] ? scsi_device_put+0x2b/0x30 [ 485.042831] do_filp_open+0x93/0x100 [ 485.042835] ? strncpy_from_user+0x56/0x1b0 [ 485.042839] ? __alloc_fd+0xb2/0x140 [ 485.042841] do_sys_open+0x177/0x280 [ 485.042844] __x64_sys_openat+0x20/0x30 [ 485.042847] do_syscall_64+0x5a/0x110 [ 485.042849] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 485.042851] RIP: 0033:0x7f6cda22dcce [ 485.042856] Code: Bad RIP value. [ 485.042857] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 485.042859] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 485.042860] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 485.042861] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 485.042862] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 485.042863] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 495.386112] kauditd_printk_skb: 1 callbacks suppressed [ 495.386114] audit: type=1400 audit(1565682010.026:62): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.activate" pid=15020 comm="apparmor_parser" [ 495.386659] audit: type=1400 audit(1565682010.026:63): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.benchmark" pid=15021 comm="apparmor_parser" [ 495.516297] audit: type=1400 audit(1565682010.158:64): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.buginfo" pid=15022 comm="apparmor_parser" [ 495.516773] audit: type=1400 audit(1565682010.158:65): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.check-kernel" pid=15023 comm="apparmor_parser" [ 495.663497] audit: type=1400 audit(1565682010.306:66): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.hook.configure" pid=15025 comm="apparmor_parser" [ 495.721415] audit: type=1400 audit(1565682010.362:67): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.daemon" pid=15024 comm="apparmor_parser" [ 495.741053] audit: type=1400 audit(1565682010.382:68): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.hook.install" pid=15026 comm="apparmor_parser" [ 495.847228] audit: type=1400 audit(1565682010.490:69): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.lxc" pid=15027 comm="apparmor_parser" [ 495.859690] audit: type=1400 audit(1565682010.502:70): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.lxd" pid=15028 comm="apparmor_parser" [ 495.924648] audit: type=1400 audit(1565682010.566:71): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.lxd.migrate" pid=15029 comm="apparmor_parser" [ 605.855134] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 605.861358] Not tainted 5.0.0-15-generic #16-Ubuntu [ 605.866526] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 605.874078] mdadm D 0 11824 11818 0x00000000 [ 605.874082] Call Trace: [ 605.874091] __schedule+0x2d0/0x840 [ 605.874093] ? __switch_to_asm+0x34/0x70 [ 605.874094] ? __switch_to_asm+0x40/0x70 [ 605.874096] schedule+0x2c/0x70 [ 605.874098] schedule_timeout+0x258/0x360 [ 605.874101] wait_for_completion+0xb7/0x140 [ 605.874104] ? wake_up_q+0x80/0x80 [ 605.874108] __floppy_read_block_0+0x138/0x190 [floppy] [ 605.874110] ? floppy_cmos_show+0x30/0x30 [floppy] [ 605.874113] floppy_revalidate+0xf8/0x230 [floppy] [ 605.874116] check_disk_change+0x62/0x70 [ 605.874118] floppy_open+0x2ae/0x380 [floppy] [ 605.874120] __blkdev_get+0xe5/0x550 [ 605.874121] ? bd_acquire+0xd0/0xd0 [ 605.874123] blkdev_get+0x10c/0x330 [ 605.874124] ? bd_acquire+0xd0/0xd0 [ 605.874126] blkdev_open+0x92/0x100 [ 605.874129] do_dentry_open+0x143/0x3a0 [ 605.874132] vfs_open+0x2d/0x30 [ 605.874134] path_openat+0x2d4/0x16d0 [ 605.874138] ? put_device+0x17/0x20 [ 605.874141] ? scsi_device_put+0x2b/0x30 [ 605.874142] do_filp_open+0x93/0x100 [ 605.874145] ? strncpy_from_user+0x56/0x1b0 [ 605.874148] ? __alloc_fd+0xb2/0x140 [ 605.874149] do_sys_open+0x177/0x280 [ 605.874152] __x64_sys_openat+0x20/0x30 [ 605.874155] do_syscall_64+0x5a/0x110 [ 605.874156] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 605.874158] RIP: 0033:0x7f6cda22dcce [ 605.874162] Code: Bad RIP value. [ 605.874163] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 605.874164] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 605.874165] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 605.874166] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 605.874166] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 605.874167] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 726.687122] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 726.693417] Not tainted 5.0.0-15-generic #16-Ubuntu [ 726.698654] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 726.706236] mdadm D 0 11824 11818 0x00000000 [ 726.706239] Call Trace: [ 726.706248] __schedule+0x2d0/0x840 [ 726.706250] ? __switch_to_asm+0x34/0x70 [ 726.706251] ? __switch_to_asm+0x40/0x70 [ 726.706253] schedule+0x2c/0x70 [ 726.706255] schedule_timeout+0x258/0x360 [ 726.706258] wait_for_completion+0xb7/0x140 [ 726.706261] ? wake_up_q+0x80/0x80 [ 726.706264] __floppy_read_block_0+0x138/0x190 [floppy] [ 726.706267] ? floppy_cmos_show+0x30/0x30 [floppy] [ 726.706269] floppy_revalidate+0xf8/0x230 [floppy] [ 726.706273] check_disk_change+0x62/0x70 [ 726.706275] floppy_open+0x2ae/0x380 [floppy] [ 726.706276] __blkdev_get+0xe5/0x550 [ 726.706278] ? bd_acquire+0xd0/0xd0 [ 726.706279] blkdev_get+0x10c/0x330 [ 726.706281] ? bd_acquire+0xd0/0xd0 [ 726.706282] blkdev_open+0x92/0x100 [ 726.706285] do_dentry_open+0x143/0x3a0 [ 726.706287] vfs_open+0x2d/0x30 [ 726.706289] path_openat+0x2d4/0x16d0 [ 726.706294] ? put_device+0x17/0x20 [ 726.706297] ? scsi_device_put+0x2b/0x30 [ 726.706298] do_filp_open+0x93/0x100 [ 726.706301] ? strncpy_from_user+0x56/0x1b0 [ 726.706304] ? __alloc_fd+0xb2/0x140 [ 726.706305] do_sys_open+0x177/0x280 [ 726.706307] __x64_sys_openat+0x20/0x30 [ 726.706310] do_syscall_64+0x5a/0x110 [ 726.706311] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 726.706313] RIP: 0033:0x7f6cda22dcce [ 726.706317] Code: Bad RIP value. [ 726.706318] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 726.706320] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 726.706320] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 726.706321] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 726.706322] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 726.706322] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 847.519123] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 847.525355] Not tainted 5.0.0-15-generic #16-Ubuntu [ 847.530610] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 847.538302] mdadm D 0 11824 11818 0x00000000 [ 847.538306] Call Trace: [ 847.538315] __schedule+0x2d0/0x840 [ 847.538319] ? __switch_to_asm+0x34/0x70 [ 847.538320] ? __switch_to_asm+0x40/0x70 [ 847.538322] schedule+0x2c/0x70 [ 847.538324] schedule_timeout+0x258/0x360 [ 847.538328] wait_for_completion+0xb7/0x140 [ 847.538332] ? wake_up_q+0x80/0x80 [ 847.538337] __floppy_read_block_0+0x138/0x190 [floppy] [ 847.538341] ? floppy_cmos_show+0x30/0x30 [floppy] [ 847.538345] floppy_revalidate+0xf8/0x230 [floppy] [ 847.538348] check_disk_change+0x62/0x70 [ 847.538351] floppy_open+0x2ae/0x380 [floppy] [ 847.538353] __blkdev_get+0xe5/0x550 [ 847.538355] ? bd_acquire+0xd0/0xd0 [ 847.538357] blkdev_get+0x10c/0x330 [ 847.538359] ? bd_acquire+0xd0/0xd0 [ 847.538361] blkdev_open+0x92/0x100 [ 847.538364] do_dentry_open+0x143/0x3a0 [ 847.538367] vfs_open+0x2d/0x30 [ 847.538370] path_openat+0x2d4/0x16d0 [ 847.538375] ? put_device+0x17/0x20 [ 847.538379] ? scsi_device_put+0x2b/0x30 [ 847.538381] do_filp_open+0x93/0x100 [ 847.538385] ? strncpy_from_user+0x56/0x1b0 [ 847.538388] ? __alloc_fd+0xb2/0x140 [ 847.538391] do_sys_open+0x177/0x280 [ 847.538393] __x64_sys_openat+0x20/0x30 [ 847.538397] do_syscall_64+0x5a/0x110 [ 847.538399] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 847.538402] RIP: 0033:0x7f6cda22dcce [ 847.538406] Code: Bad RIP value. [ 847.538408] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 847.538410] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 847.538411] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 847.538412] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 847.538413] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 847.538414] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 968.351124] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 968.357352] Not tainted 5.0.0-15-generic #16-Ubuntu [ 968.362579] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 968.370292] mdadm D 0 11824 11818 0x00000000 [ 968.370295] Call Trace: [ 968.370305] __schedule+0x2d0/0x840 [ 968.370307] ? __switch_to_asm+0x34/0x70 [ 968.370308] ? __switch_to_asm+0x40/0x70 [ 968.370309] schedule+0x2c/0x70 [ 968.370311] schedule_timeout+0x258/0x360 [ 968.370314] wait_for_completion+0xb7/0x140 [ 968.370318] ? wake_up_q+0x80/0x80 [ 968.370322] __floppy_read_block_0+0x138/0x190 [floppy] [ 968.370324] ? floppy_cmos_show+0x30/0x30 [floppy] [ 968.370327] floppy_revalidate+0xf8/0x230 [floppy] [ 968.370330] check_disk_change+0x62/0x70 [ 968.370332] floppy_open+0x2ae/0x380 [floppy] [ 968.370334] __blkdev_get+0xe5/0x550 [ 968.370336] ? bd_acquire+0xd0/0xd0 [ 968.370337] blkdev_get+0x10c/0x330 [ 968.370339] ? bd_acquire+0xd0/0xd0 [ 968.370340] blkdev_open+0x92/0x100 [ 968.370343] do_dentry_open+0x143/0x3a0 [ 968.370344] vfs_open+0x2d/0x30 [ 968.370347] path_openat+0x2d4/0x16d0 [ 968.370351] ? put_device+0x17/0x20 [ 968.370354] ? scsi_device_put+0x2b/0x30 [ 968.370356] do_filp_open+0x93/0x100 [ 968.370359] ? strncpy_from_user+0x56/0x1b0 [ 968.370361] ? __alloc_fd+0xb2/0x140 [ 968.370363] do_sys_open+0x177/0x280 [ 968.370365] __x64_sys_openat+0x20/0x30 [ 968.370367] do_syscall_64+0x5a/0x110 [ 968.370368] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 968.370370] RIP: 0033:0x7f6cda22dcce [ 968.370374] Code: Bad RIP value. [ 968.370375] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 968.370376] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 968.370377] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 968.370377] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 968.370378] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 968.370379] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 1089.183127] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 1089.189530] Not tainted 5.0.0-15-generic #16-Ubuntu [ 1089.194883] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1089.202964] mdadm D 0 11824 11818 0x00000000 [ 1089.202967] Call Trace: [ 1089.202977] __schedule+0x2d0/0x840 [ 1089.202979] ? __switch_to_asm+0x34/0x70 [ 1089.202980] ? __switch_to_asm+0x40/0x70 [ 1089.202982] schedule+0x2c/0x70 [ 1089.202984] schedule_timeout+0x258/0x360 [ 1089.202987] wait_for_completion+0xb7/0x140 [ 1089.202990] ? wake_up_q+0x80/0x80 [ 1089.202994] __floppy_read_block_0+0x138/0x190 [floppy] [ 1089.202996] ? floppy_cmos_show+0x30/0x30 [floppy] [ 1089.202999] floppy_revalidate+0xf8/0x230 [floppy] [ 1089.203002] check_disk_change+0x62/0x70 [ 1089.203004] floppy_open+0x2ae/0x380 [floppy] [ 1089.203006] __blkdev_get+0xe5/0x550 [ 1089.203007] ? bd_acquire+0xd0/0xd0 [ 1089.203008] blkdev_get+0x10c/0x330 [ 1089.203010] ? bd_acquire+0xd0/0xd0 [ 1089.203011] blkdev_open+0x92/0x100 [ 1089.203014] do_dentry_open+0x143/0x3a0 [ 1089.203016] vfs_open+0x2d/0x30 [ 1089.203018] path_openat+0x2d4/0x16d0 [ 1089.203023] ? put_device+0x17/0x20 [ 1089.203026] ? scsi_device_put+0x2b/0x30 [ 1089.203027] do_filp_open+0x93/0x100 [ 1089.203031] ? strncpy_from_user+0x56/0x1b0 [ 1089.203033] ? __alloc_fd+0xb2/0x140 [ 1089.203035] do_sys_open+0x177/0x280 [ 1089.203037] __x64_sys_openat+0x20/0x30 [ 1089.203040] do_syscall_64+0x5a/0x110 [ 1089.203041] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1089.203043] RIP: 0033:0x7f6cda22dcce [ 1089.203047] Code: Bad RIP value. [ 1089.203047] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1089.203049] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 1089.203049] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 1089.203050] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 1089.203051] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 1089.203051] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 1210.015123] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 1210.021681] Not tainted 5.0.0-15-generic #16-Ubuntu [ 1210.026923] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1210.034565] mdadm D 0 11824 11818 0x00000000 [ 1210.034569] Call Trace: [ 1210.034578] __schedule+0x2d0/0x840 [ 1210.034581] ? __switch_to_asm+0x34/0x70 [ 1210.034582] ? __switch_to_asm+0x40/0x70 [ 1210.034583] schedule+0x2c/0x70 [ 1210.034585] schedule_timeout+0x258/0x360 [ 1210.034588] wait_for_completion+0xb7/0x140 [ 1210.034592] ? wake_up_q+0x80/0x80 [ 1210.034596] __floppy_read_block_0+0x138/0x190 [floppy] [ 1210.034598] ? floppy_cmos_show+0x30/0x30 [floppy] [ 1210.034601] floppy_revalidate+0xf8/0x230 [floppy] [ 1210.034604] check_disk_change+0x62/0x70 [ 1210.034606] floppy_open+0x2ae/0x380 [floppy] [ 1210.034608] __blkdev_get+0xe5/0x550 [ 1210.034610] ? bd_acquire+0xd0/0xd0 [ 1210.034611] blkdev_get+0x10c/0x330 [ 1210.034613] ? bd_acquire+0xd0/0xd0 [ 1210.034614] blkdev_open+0x92/0x100 [ 1210.034617] do_dentry_open+0x143/0x3a0 [ 1210.034619] vfs_open+0x2d/0x30 [ 1210.034621] path_openat+0x2d4/0x16d0 [ 1210.034625] ? put_device+0x17/0x20 [ 1210.034628] ? scsi_device_put+0x2b/0x30 [ 1210.034630] do_filp_open+0x93/0x100 [ 1210.034633] ? strncpy_from_user+0x56/0x1b0 [ 1210.034635] ? __alloc_fd+0xb2/0x140 [ 1210.034637] do_sys_open+0x177/0x280 [ 1210.034639] __x64_sys_openat+0x20/0x30 [ 1210.034642] do_syscall_64+0x5a/0x110 [ 1210.034643] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1210.034645] RIP: 0033:0x7f6cda22dcce [ 1210.034648] Code: Bad RIP value. [ 1210.034649] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1210.034651] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 1210.034651] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 1210.034652] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 1210.034653] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 1210.034653] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 1330.847117] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 1330.853330] Not tainted 5.0.0-15-generic #16-Ubuntu [ 1330.858615] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1330.866152] mdadm D 0 11824 11818 0x00000000 [ 1330.866155] Call Trace: [ 1330.866164] __schedule+0x2d0/0x840 [ 1330.866167] ? __switch_to_asm+0x34/0x70 [ 1330.866169] ? __switch_to_asm+0x40/0x70 [ 1330.866171] schedule+0x2c/0x70 [ 1330.866173] schedule_timeout+0x258/0x360 [ 1330.866177] wait_for_completion+0xb7/0x140 [ 1330.866180] ? wake_up_q+0x80/0x80 [ 1330.866186] __floppy_read_block_0+0x138/0x190 [floppy] [ 1330.866189] ? floppy_cmos_show+0x30/0x30 [floppy] [ 1330.866193] floppy_revalidate+0xf8/0x230 [floppy] [ 1330.866197] check_disk_change+0x62/0x70 [ 1330.866200] floppy_open+0x2ae/0x380 [floppy] [ 1330.866202] __blkdev_get+0xe5/0x550 [ 1330.866204] ? bd_acquire+0xd0/0xd0 [ 1330.866206] blkdev_get+0x10c/0x330 [ 1330.866208] ? bd_acquire+0xd0/0xd0 [ 1330.866210] blkdev_open+0x92/0x100 [ 1330.866214] do_dentry_open+0x143/0x3a0 [ 1330.866216] vfs_open+0x2d/0x30 [ 1330.866219] path_openat+0x2d4/0x16d0 [ 1330.866224] ? put_device+0x17/0x20 [ 1330.866227] ? scsi_device_put+0x2b/0x30 [ 1330.866230] do_filp_open+0x93/0x100 [ 1330.866233] ? strncpy_from_user+0x56/0x1b0 [ 1330.866237] ? __alloc_fd+0xb2/0x140 [ 1330.866240] do_sys_open+0x177/0x280 [ 1330.866243] __x64_sys_openat+0x20/0x30 [ 1330.866246] do_syscall_64+0x5a/0x110 [ 1330.866248] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1330.866251] RIP: 0033:0x7f6cda22dcce [ 1330.866255] Code: Bad RIP value. [ 1330.866257] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1330.866259] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 1330.866260] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 1330.866261] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 1330.866262] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 1330.866262] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 1451.679130] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 1451.685341] Not tainted 5.0.0-15-generic #16-Ubuntu [ 1451.690577] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1451.698381] mdadm D 0 11824 11818 0x00000000 [ 1451.698385] Call Trace: [ 1451.698394] __schedule+0x2d0/0x840 [ 1451.698397] ? __switch_to_asm+0x34/0x70 [ 1451.698398] ? __switch_to_asm+0x40/0x70 [ 1451.698399] schedule+0x2c/0x70 [ 1451.698401] schedule_timeout+0x258/0x360 [ 1451.698405] wait_for_completion+0xb7/0x140 [ 1451.698408] ? wake_up_q+0x80/0x80 [ 1451.698412] __floppy_read_block_0+0x138/0x190 [floppy] [ 1451.698415] ? floppy_cmos_show+0x30/0x30 [floppy] [ 1451.698417] floppy_revalidate+0xf8/0x230 [floppy] [ 1451.698420] check_disk_change+0x62/0x70 [ 1451.698422] floppy_open+0x2ae/0x380 [floppy] [ 1451.698424] __blkdev_get+0xe5/0x550 [ 1451.698426] ? bd_acquire+0xd0/0xd0 [ 1451.698427] blkdev_get+0x10c/0x330 [ 1451.698429] ? bd_acquire+0xd0/0xd0 [ 1451.698430] blkdev_open+0x92/0x100 [ 1451.698433] do_dentry_open+0x143/0x3a0 [ 1451.698435] vfs_open+0x2d/0x30 [ 1451.698437] path_openat+0x2d4/0x16d0 [ 1451.698442] ? put_device+0x17/0x20 [ 1451.698445] ? scsi_device_put+0x2b/0x30 [ 1451.698447] do_filp_open+0x93/0x100 [ 1451.698450] ? strncpy_from_user+0x56/0x1b0 [ 1451.698453] ? __alloc_fd+0xb2/0x140 [ 1451.698454] do_sys_open+0x177/0x280 [ 1451.698457] __x64_sys_openat+0x20/0x30 [ 1451.698460] do_syscall_64+0x5a/0x110 [ 1451.698461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1451.698462] RIP: 0033:0x7f6cda22dcce [ 1451.698466] Code: Bad RIP value. [ 1451.698467] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1451.698468] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 1451.698469] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 1451.698470] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 1451.698470] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 1451.698471] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 [ 1572.511130] INFO: task mdadm:11824 blocked for more than 120 seconds. [ 1572.517344] Not tainted 5.0.0-15-generic #16-Ubuntu [ 1572.522568] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1572.530098] mdadm D 0 11824 11818 0x00000000 [ 1572.530101] Call Trace: [ 1572.530111] __schedule+0x2d0/0x840 [ 1572.530113] ? __switch_to_asm+0x34/0x70 [ 1572.530115] ? __switch_to_asm+0x40/0x70 [ 1572.530117] schedule+0x2c/0x70 [ 1572.530119] schedule_timeout+0x258/0x360 [ 1572.530122] wait_for_completion+0xb7/0x140 [ 1572.530126] ? wake_up_q+0x80/0x80 [ 1572.530131] __floppy_read_block_0+0x138/0x190 [floppy] [ 1572.530135] ? floppy_cmos_show+0x30/0x30 [floppy] [ 1572.530137] floppy_revalidate+0xf8/0x230 [floppy] [ 1572.530140] check_disk_change+0x62/0x70 [ 1572.530142] floppy_open+0x2ae/0x380 [floppy] [ 1572.530144] __blkdev_get+0xe5/0x550 [ 1572.530146] ? bd_acquire+0xd0/0xd0 [ 1572.530147] blkdev_get+0x10c/0x330 [ 1572.530149] ? bd_acquire+0xd0/0xd0 [ 1572.530150] blkdev_open+0x92/0x100 [ 1572.530153] do_dentry_open+0x143/0x3a0 [ 1572.530155] vfs_open+0x2d/0x30 [ 1572.530157] path_openat+0x2d4/0x16d0 [ 1572.530161] ? put_device+0x17/0x20 [ 1572.530164] ? scsi_device_put+0x2b/0x30 [ 1572.530165] do_filp_open+0x93/0x100 [ 1572.530169] ? strncpy_from_user+0x56/0x1b0 [ 1572.530171] ? __alloc_fd+0xb2/0x140 [ 1572.530173] do_sys_open+0x177/0x280 [ 1572.530175] __x64_sys_openat+0x20/0x30 [ 1572.530178] do_syscall_64+0x5a/0x110 [ 1572.530179] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1572.530182] RIP: 0033:0x7f6cda22dcce [ 1572.530185] Code: Bad RIP value. [ 1572.530186] RSP: 002b:00007ffedec2d0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1572.530188] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007f6cda22dcce [ 1572.530188] RDX: 0000000000004000 RSI: 000055be36cfd870 RDI: 00000000ffffff9c [ 1572.530189] RBP: 000055be36cfd870 R08: 000055be36cfd870 R09: 0000000000000000 [ 1572.530190] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedec2d3a0 [ 1572.530190] R13: 0000000000000000 R14: 0000000000000001 R15: 000055be36cfcbb0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1825413/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
