I see the same thing related to slowness in a old-style parallel port device passed to a VM. Shortly after there's traffic related to the parallel port the task will hang forever, eventually locking up the VM entirely. This has happened on two SuperMicro servers, the problem did not exist in Xenial and began with the upgrade to bionic and remains in eoan. Oct 9 03:43:40 noc2 kernel: [48455.643616] INFO: task CPU 0/KVM:18338 blocked for more than 845 seconds. Oct 9 03:43:40 noc2 kernel: [48455.643624] Tainted: P O 5.3.0-13-generic #14-Ubuntu Oct 9 03:43:40 noc2 kernel: [48455.643625] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Oct 9 03:43:40 noc2 kernel: [48455.643627] CPU 0/KVM D 0 18338 1 0x00000100 Oct 9 03:43:40 noc2 kernel: [48455.643630] Call Trace: Oct 9 03:43:40 noc2 kernel: [48455.643643] __schedule+0x2b9/0x6c0 Oct 9 03:43:40 noc2 kernel: [48455.643655] ? handle_io+0x4c/0xc0 [kvm_intel] Oct 9 03:43:40 noc2 kernel: [48455.643659] schedule+0x42/0xb0 Oct 9 03:43:40 noc2 kernel: [48455.643661] schedule_preempt_disabled+0xe/0x10 Oct 9 03:43:40 noc2 kernel: [48455.643663] __mutex_lock.isra.0+0x182/0x4f0 Oct 9 03:43:40 noc2 kernel: [48455.643712] ? kvm_arch_vcpu_put+0xe4/0xf0 [kvm] Oct 9 03:43:40 noc2 kernel: [48455.643731] ? kvm_arch_vcpu_ioctl_run+0x37a/0x590 [kvm] Oct 9 03:43:40 noc2 kernel: [48455.643733] __mutex_lock_slowpath+0x13/0x20 Oct 9 03:43:40 noc2 kernel: [48455.643735] mutex_lock+0x2e/0x40 Oct 9 03:43:40 noc2 kernel: [48455.643738] pp_ioctl+0x25/0x50 [ppdev] Oct 9 03:43:40 noc2 kernel: [48455.643741] do_vfs_ioctl+0x407/0x670 Oct 9 03:43:40 noc2 kernel: [48455.643745] ? __secure_computing+0x42/0xe0 Oct 9 03:43:40 noc2 kernel: [48455.643747] ksys_ioctl+0x67/0x90 Oct 9 03:43:40 noc2 kernel: [48455.643748] __x64_sys_ioctl+0x1a/0x20 Oct 9 03:43:40 noc2 kernel: [48455.643752] do_syscall_64+0x5a/0x130 Oct 9 03:43:40 noc2 kernel: [48455.643754] entry_SYSCALL_64_after_hwframe+0x44/0xa9 Oct 9 03:43:40 noc2 kernel: [48455.643756] RIP: 0033:0x7fb9e75b167b Oct 9 03:43:40 noc2 kernel: [48455.643764] Code: Bad RIP value. Oct 9 03:43:40 noc2 kernel: [48455.643765] RSP: 002b:00007fb9e4d743a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Oct 9 03:43:40 noc2 kernel: [48455.643767] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fb9e75b167b Oct 9 03:43:40 noc2 kernel: [48455.643768] RDX: 00007fb9e4d743b7 RSI: 0000000040017086 RDI: 000000000000000a Oct 9 03:43:40 noc2 kernel: [48455.643769] RBP: 000000000000000a R08: 000055a2756817e8 R09: 000055a275289de0 Oct 9 03:43:40 noc2 kernel: [48455.643770] R10: 0000000000000001 R11: 0000000000000246 R12: 00007fb9e4d743ef Oct 9 03:43:40 noc2 kernel: [48455.643771] R13: 0000000000000000 R14: 0000000000000001 R15: 000055a276e69010
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1825413 Title: mdadm, mkfs, other io commands hang, stuck task, bad rip Status in linux package in Ubuntu: Confirmed Bug description: 1. disco 2. # apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.0.0.13.14 Candidate: 5.0.0.13.14 Version table: *** 5.0.0.13.14 500 500 http://archive.ubuntu.com/ubuntu disco/main amd64 Packages 100 /var/lib/dpkg/status 3. installation completes sucessfully 4. Running an installation of Disco creating filesystems and probing things will hang (stuck task) every so often. When it happens, the kernel throws an oops and bad rip value. [ 967.810391] INFO: task mdadm:12213 blocked for more than 120 seconds. [ 967.811787] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.813330] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.815500] mdadm D 0 12213 12207 0x00000000 [ 967.815503] Call Trace: [ 967.815509] __schedule+0x2d0/0x840 [ 967.815511] ? __switch_to_asm+0x40/0x70 [ 967.815512] ? __switch_to_asm+0x34/0x70 [ 967.815514] schedule+0x2c/0x70 [ 967.815516] schedule_preempt_disabled+0xe/0x10 [ 967.815518] __mutex_lock.isra.10+0x2e4/0x4c0 [ 967.815522] ? exact_lock+0x11/0x20 [ 967.815524] __mutex_lock_slowpath+0x13/0x20 [ 967.815528] mutex_lock+0x2c/0x30 [ 967.815530] __blkdev_get+0x7b/0x550 [ 967.815532] ? bd_acquire+0xd0/0xd0 [ 967.815533] blkdev_get+0x10c/0x330 [ 967.815535] ? bd_acquire+0xd0/0xd0 [ 967.815537] blkdev_open+0x92/0x100 [ 967.815539] do_dentry_open+0x143/0x3a0 [ 967.815540] vfs_open+0x2d/0x30 [ 967.815542] path_openat+0x2d4/0x16d0 [ 967.815547] ? put_device+0x17/0x20 [ 967.815552] ? scsi_device_put+0x2b/0x30 [ 967.815553] do_filp_open+0x93/0x100 [ 967.815555] ? strncpy_from_user+0x56/0x1b0 [ 967.815558] ? __alloc_fd+0x46/0x140 [ 967.815560] do_sys_open+0x177/0x280 [ 967.815561] ? _cond_resched+0x19/0x30 [ 967.815563] __x64_sys_openat+0x20/0x30 [ 967.815566] do_syscall_64+0x5a/0x110 [ 967.815567] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.815568] RIP: 0033:0x7faa36406cce [ 967.815572] Code: Bad RIP value. [ 967.815573] RSP: 002b:00007ffedb663f80 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 967.815574] RAX: ffffffffffffffda RBX: 0000000000004000 RCX: 00007faa36406cce [ 967.815575] RDX: 0000000000004000 RSI: 0000564df70257b0 RDI: 00000000ffffff9c [ 967.815576] RBP: 0000564df70257b0 R08: 0000564df70257b0 R09: 0000000000000000 [ 967.815576] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffedb664240 [ 967.815577] R13: 0000000000000000 R14: 0000000000000001 R15: 0000564df7023e00 [ 967.799227] INFO: task mkfs.btrfs:3767 blocked for more than 120 seconds. [ 967.803509] Tainted: P O 5.0.0-13-generic #14-Ubuntu [ 967.807192] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 967.810235] mkfs.btrfs D 0 3767 1866 0x00000000 [ 967.810239] Call Trace: [ 967.810251] __schedule+0x2d0/0x840 [ 967.810254] ? __switch_to_asm+0x34/0x70 [ 967.810256] ? __switch_to_asm+0x40/0x70 [ 967.810258] schedule+0x2c/0x70 [ 967.810260] schedule_timeout+0x258/0x360 [ 967.810277] wait_for_completion+0xb7/0x140 [ 967.810281] ? wake_up_q+0x80/0x80 [ 967.810293] __floppy_read_block_0+0x138/0x190 [floppy] [ 967.810298] ? floppy_cmos_show+0x30/0x30 [floppy] [ 967.810302] floppy_revalidate+0xf8/0x230 [floppy] [ 967.810307] check_disk_change+0x62/0x70 [ 967.810309] floppy_open+0x2ae/0x380 [floppy] [ 967.810311] __blkdev_get+0xe5/0x550 [ 967.810313] ? bd_acquire+0xd0/0xd0 [ 967.810315] blkdev_get+0x10c/0x330 [ 967.810316] ? bd_acquire+0xd0/0xd0 [ 967.810318] blkdev_open+0x92/0x100 [ 967.810321] do_dentry_open+0x143/0x3a0 [ 967.810323] vfs_open+0x2d/0x30 [ 967.810326] path_openat+0x2d4/0x16d0 [ 967.810328] ? filename_lookup.part.60+0xe0/0x170 [ 967.810332] ? strncpy_from_user+0x56/0x1b0 [ 967.810333] do_filp_open+0x93/0x100 [ 967.810353] ? strncpy_from_user+0x56/0x1b0 [ 967.810358] ? __alloc_fd+0x46/0x140 [ 967.810360] do_sys_open+0x177/0x280 [ 967.810362] ? _cond_resched+0x19/0x30 [ 967.810364] __x64_sys_openat+0x20/0x30 [ 967.810368] do_syscall_64+0x5a/0x110 [ 967.810369] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 967.810372] RIP: 0033:0x7f46b99374db [ 967.810377] Code: Bad RIP value. [ 967.810378] RSP: 002b:00007ffc9e849d70 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 967.810380] RAX: ffffffffffffffda RBX: 0000556674552080 RCX: 00007f46b99374db [ 967.810381] RDX: 0000000000080000 RSI: 0000556674552100 RDI: 00000000ffffff9c [ 967.810382] RBP: 000055667454a270 R08: 0000556674552120 R09: 0000000000004000 [ 967.810382] R10: 0000000000000000 R11: 0000000000000246 R12: 000000005cb8c394 [ 967.810383] R13: 00007f46b99993c4 R14: 00000000dcb8c394 R15: 00007f46b9988425 ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: linux-image-virtual 5.0.0.13.14 ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6 Uname: Linux 5.0.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair AlsaDevices: total 0 crw-rw---- 1 root audio 116, 33 Apr 18 18:35 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.10-0ubuntu27 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer'] failed with exit code 1: CRDA: N/A Date: Thu Apr 18 18:45:52 2019 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=C.UTF-8 SHELL=/bin/bash ProcFB: 0 bochsdrmfb ProcKernelCmdLine: root=squash:http://10.245.168.20:34259/root/squashfs ds=nocloud-net;seedfrom=http://10.245.168.20:34259/ console=ttyS0 overlayroot=tmpfs ro systemd.mask=snapd.seeded.service systemd.mask=snapd.service ip=:::::BOOTIF:dhcp BOOTIF=01-52-54-00-12-34-01 RelatedPackageVersions: linux-restricted-modules-5.0.0-13-generic N/A linux-backports-modules-5.0.0-13-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.12.0-1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-disco dmi.modalias: dmi:bvnSeaBIOS:bvr1.12.0-1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-disco:cvnQEMU:ct1:cvrpc-i440fx-disco: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-disco dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1825413/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
