Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16 ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Also affects: linux (Ubuntu Bionic) Importance: High Status: Confirmed ** Tags added: kernel-da-key ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => Incomplete -- 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/1762450 Title: [18.04] writing on thumb drives causes hang for write op, shutdown and 'sync' command Status in linux package in Ubuntu: Incomplete Status in linux source package in Bionic: Incomplete Bug description: I've upgraded to 18.04. Since then, it's impossible to use thumb- drives. If I try, on the first write operation, that operation hangs. Trying to issue a 'sync' command that hangs too. After a while (some minutes or so?) I see the following in kernel log / dmesg (see later). It's not even possible to cleanly shut the computer down, as it also hangs then. kernel is: 4.15.0-15-generic Linux oxygene 4.15.0-15-generic #16-Ubuntu SMP Wed Apr 4 13:58:14 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ dpkg -S /boot/vmlinuz-4.15.0-15-generic linux-image-4.15.0-15-generic: /boot/vmlinuz-4.15.0-15-generic $ dpkg -l linux-image-4.15.0-15-generic ii linux-image-4.15.0-15-generic 4.15.0-15.16 amd64 Linux kernel image for version 4.15.0 on 64 bit x86 SMP dmesg: [ 110.931501] usb 6-1: new high-speed USB device number 2 using xhci_hcd [ 111.083432] usb 6-1: New USB device found, idVendor=13fe, idProduct=1d00 [ 111.083438] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 111.083441] usb 6-1: Product: DataTraveler 2.0 [ 111.083444] usb 6-1: Manufacturer: Kingston [ 111.083447] usb 6-1: SerialNumber: 5B7402949950 [ 111.157729] usb-storage 6-1:1.0: USB Mass Storage device detected [ 111.157882] scsi host6: usb-storage 6-1:1.0 [ 111.158826] usbcore: registered new interface driver usb-storage [ 111.174387] usbcore: registered new interface driver uas [ 112.172295] scsi 6:0:0:0: Direct-Access Kingston DataTraveler 2.0 PMAP PQ: 0 ANSI: 0 CCS [ 112.203451] sd 6:0:0:0: Attached scsi generic sg1 type 0 [ 112.443337] sd 6:0:0:0: [sdb] 4030464 512-byte logical blocks: (2.06 GB/1.92 GiB) [ 112.443462] sd 6:0:0:0: [sdb] Write Protect is off [ 112.443464] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00 [ 112.443586] sd 6:0:0:0: [sdb] No Caching mode page found [ 112.443591] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 112.447045] sd 6:0:0:0: [sdb] Attached SCSI removable disk this was ok, the problem is from here: [ 363.231738] INFO: task fdisk:1798 blocked for more than 120 seconds. [ 363.231745] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 363.231747] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 363.231750] fdisk D 0 1798 1728 0x00000000 [ 363.231754] Call Trace: [ 363.231764] __schedule+0x297/0x8b0 [ 363.231768] ? fdatawait_one_bdev+0x20/0x20 [ 363.231771] schedule+0x2c/0x80 [ 363.231775] io_schedule+0x16/0x40 [ 363.231779] wait_on_page_bit_common+0xd8/0x160 [ 363.231782] ? page_cache_tree_insert+0xe0/0xe0 [ 363.231785] __filemap_fdatawait_range+0xfa/0x160 [ 363.231788] ? __filemap_fdatawrite_range+0xc1/0x100 [ 363.231791] ? __filemap_fdatawrite_range+0xcd/0x100 [ 363.231794] ? __sync_filesystem+0x60/0x60 [ 363.231797] filemap_fdatawait_keep_errors+0x1e/0x40 [ 363.231799] fdatawait_one_bdev+0x16/0x20 [ 363.231802] iterate_bdevs+0xb7/0x160 [ 363.231805] sys_sync+0x7e/0xb0 [ 363.231809] do_syscall_64+0x73/0x130 [ 363.231813] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 363.231816] RIP: 0033:0x7f2fcff17287 [ 363.231817] RSP: 002b:00007fffbbea61a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a2 [ 363.231820] RAX: ffffffffffffffda RBX: 000056096b767400 RCX: 00007f2fcff17287 [ 363.231821] RDX: 0000000000000000 RSI: 000056096b766018 RDI: 000056096b767400 [ 363.231823] RBP: 00007fffbbea82d8 R08: 000000000000000a R09: 7472617020656854 [ 363.231824] R10: 0000000000000008 R11: 0000000000000202 R12: 000056096a25b198 [ 363.231825] R13: 0000000000000000 R14: 000056096a25b198 R15: 0000000000000000 [ 484.045928] INFO: task fdisk:1798 blocked for more than 120 seconds. [ 484.045934] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 484.045936] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 484.045939] fdisk D 0 1798 1728 0x00000000 [ 484.045942] Call Trace: [ 484.045950] __schedule+0x297/0x8b0 [ 484.045954] ? fdatawait_one_bdev+0x20/0x20 [ 484.045956] schedule+0x2c/0x80 [ 484.045959] io_schedule+0x16/0x40 [ 484.045962] wait_on_page_bit_common+0xd8/0x160 [ 484.045965] ? page_cache_tree_insert+0xe0/0xe0 [ 484.045967] __filemap_fdatawait_range+0xfa/0x160 [ 484.045970] ? __filemap_fdatawrite_range+0xc1/0x100 [ 484.045972] ? __filemap_fdatawrite_range+0xcd/0x100 [ 484.045975] ? __sync_filesystem+0x60/0x60 [ 484.045977] filemap_fdatawait_keep_errors+0x1e/0x40 [ 484.045979] fdatawait_one_bdev+0x16/0x20 [ 484.045981] iterate_bdevs+0xb7/0x160 [ 484.045984] sys_sync+0x7e/0xb0 [ 484.045987] do_syscall_64+0x73/0x130 [ 484.045990] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 484.045992] RIP: 0033:0x7f2fcff17287 [ 484.045994] RSP: 002b:00007fffbbea61a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a2 [ 484.045996] RAX: ffffffffffffffda RBX: 000056096b767400 RCX: 00007f2fcff17287 [ 484.045997] RDX: 0000000000000000 RSI: 000056096b766018 RDI: 000056096b767400 [ 484.045998] RBP: 00007fffbbea82d8 R08: 000000000000000a R09: 7472617020656854 [ 484.046000] R10: 0000000000000008 R11: 0000000000000202 R12: 000056096a25b198 [ 484.046001] R13: 0000000000000000 R14: 000056096a25b198 R15: 0000000000000000 [ 484.046024] INFO: task sync:2149 blocked for more than 120 seconds. [ 484.046026] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 484.046028] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 484.046030] sync D 0 2149 1821 0x00000004 [ 484.046032] Call Trace: [ 484.046035] __schedule+0x297/0x8b0 [ 484.046038] schedule+0x2c/0x80 [ 484.046040] schedule_preempt_disabled+0xe/0x10 [ 484.046043] __mutex_lock.isra.2+0x18c/0x4d0 [ 484.046045] ? wait_woken+0x80/0x80 [ 484.046048] ? fdatawait_one_bdev+0x20/0x20 [ 484.046050] __mutex_lock_slowpath+0x13/0x20 [ 484.046053] ? __mutex_lock_slowpath+0x13/0x20 [ 484.046055] mutex_lock+0x2f/0x40 [ 484.046057] iterate_bdevs+0xa0/0x160 [ 484.046059] sys_sync+0x70/0xb0 [ 484.046062] do_syscall_64+0x73/0x130 [ 484.046065] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 484.046066] RIP: 0033:0x7f6707b3f287 [ 484.046067] RSP: 002b:00007ffd0e393dc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 [ 484.046069] RAX: ffffffffffffffda RBX: 00007ffd0e393ef8 RCX: 00007f6707b3f287 [ 484.046071] RDX: 00007f6707e16001 RSI: 0000000000000000 RDI: 00007f6707bdd4b0 [ 484.046072] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 484.046073] R10: 0000564af80d2010 R11: 0000000000000246 R12: 0000000000000001 [ 484.046074] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 484.046077] INFO: task fdisk:2199 blocked for more than 120 seconds. [ 484.046079] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 484.046081] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 484.046083] fdisk D 0 2199 2198 0x00000004 [ 484.046085] Call Trace: [ 484.046088] __schedule+0x297/0x8b0 [ 484.046090] schedule+0x2c/0x80 [ 484.046092] schedule_preempt_disabled+0xe/0x10 [ 484.046095] __mutex_lock.isra.2+0x18c/0x4d0 [ 484.046098] __mutex_lock_slowpath+0x13/0x20 [ 484.046100] ? __mutex_lock_slowpath+0x13/0x20 [ 484.046102] mutex_lock+0x2f/0x40 [ 484.046104] __blkdev_get+0x71/0x4c0 [ 484.046107] blkdev_get+0x129/0x320 [ 484.046109] ? __fsnotify_parent+0x96/0x120 [ 484.046112] ? security_capable+0x4e/0x70 [ 484.046114] blkdev_open+0x95/0xf0 [ 484.046117] do_dentry_open+0x1c2/0x310 [ 484.046119] ? __inode_permission+0x5b/0x160 [ 484.046121] ? bd_acquire+0xd0/0xd0 [ 484.046124] vfs_open+0x4f/0x80 [ 484.046126] path_openat+0x66e/0x1770 [ 484.046129] do_filp_open+0x9b/0x110 [ 484.046132] ? __check_object_size+0xaf/0x1b0 [ 484.046135] ? __alloc_fd+0x46/0x170 [ 484.046138] do_sys_open+0x1bb/0x2c0 [ 484.046140] ? do_sys_open+0x1bb/0x2c0 [ 484.046143] SyS_openat+0x14/0x20 [ 484.046145] do_syscall_64+0x73/0x130 [ 484.046148] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 484.046150] RIP: 0033:0x7f7bf2007c8e [ 484.046151] RSP: 002b:00007ffde2a82080 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 484.046153] RAX: ffffffffffffffda RBX: 000055b725656400 RCX: 00007f7bf2007c8e [ 484.046154] RDX: 0000000000080002 RSI: 00007ffde2a827c3 RDI: 00000000ffffff9c [ 484.046155] RBP: 0000000000000000 R08: 000000000000000a R09: 6d6572206c6c6977 [ 484.046156] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7bf29bd444 [ 484.046157] R13: 00007ffde2a827c3 R14: 0000000000000000 R15: 0000000000000000 [ 604.909492] INFO: task fdisk:1798 blocked for more than 120 seconds. [ 604.909499] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 604.909502] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 604.909505] fdisk D 0 1798 1728 0x00000000 [ 604.909509] Call Trace: [ 604.909519] __schedule+0x297/0x8b0 [ 604.909523] ? fdatawait_one_bdev+0x20/0x20 [ 604.909526] schedule+0x2c/0x80 [ 604.909530] io_schedule+0x16/0x40 [ 604.909533] wait_on_page_bit_common+0xd8/0x160 [ 604.909536] ? page_cache_tree_insert+0xe0/0xe0 [ 604.909540] __filemap_fdatawait_range+0xfa/0x160 [ 604.909543] ? __filemap_fdatawrite_range+0xc1/0x100 [ 604.909546] ? __filemap_fdatawrite_range+0xcd/0x100 [ 604.909549] ? __sync_filesystem+0x60/0x60 [ 604.909552] filemap_fdatawait_keep_errors+0x1e/0x40 [ 604.909554] fdatawait_one_bdev+0x16/0x20 [ 604.909557] iterate_bdevs+0xb7/0x160 [ 604.909560] sys_sync+0x7e/0xb0 [ 604.909564] do_syscall_64+0x73/0x130 [ 604.909568] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 604.909571] RIP: 0033:0x7f2fcff17287 [ 604.909572] RSP: 002b:00007fffbbea61a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a2 [ 604.909575] RAX: ffffffffffffffda RBX: 000056096b767400 RCX: 00007f2fcff17287 [ 604.909576] RDX: 0000000000000000 RSI: 000056096b766018 RDI: 000056096b767400 [ 604.909578] RBP: 00007fffbbea82d8 R08: 000000000000000a R09: 7472617020656854 [ 604.909579] R10: 0000000000000008 R11: 0000000000000202 R12: 000056096a25b198 [ 604.909581] R13: 0000000000000000 R14: 000056096a25b198 R15: 0000000000000000 [ 604.909607] INFO: task sync:2149 blocked for more than 120 seconds. [ 604.909610] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 604.909612] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 604.909614] sync D 0 2149 1821 0x00000004 [ 604.909617] Call Trace: [ 604.909621] __schedule+0x297/0x8b0 [ 604.909624] schedule+0x2c/0x80 [ 604.909627] schedule_preempt_disabled+0xe/0x10 [ 604.909630] __mutex_lock.isra.2+0x18c/0x4d0 [ 604.909633] ? wait_woken+0x80/0x80 [ 604.909636] ? fdatawait_one_bdev+0x20/0x20 [ 604.909639] __mutex_lock_slowpath+0x13/0x20 [ 604.909642] ? __mutex_lock_slowpath+0x13/0x20 [ 604.909645] mutex_lock+0x2f/0x40 [ 604.909647] iterate_bdevs+0xa0/0x160 [ 604.909650] sys_sync+0x70/0xb0 [ 604.909653] do_syscall_64+0x73/0x130 [ 604.909657] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 604.909659] RIP: 0033:0x7f6707b3f287 [ 604.909660] RSP: 002b:00007ffd0e393dc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 [ 604.909662] RAX: ffffffffffffffda RBX: 00007ffd0e393ef8 RCX: 00007f6707b3f287 [ 604.909664] RDX: 00007f6707e16001 RSI: 0000000000000000 RDI: 00007f6707bdd4b0 [ 604.909665] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 604.909667] R10: 0000564af80d2010 R11: 0000000000000246 R12: 0000000000000001 [ 604.909668] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 604.909671] INFO: task fdisk:2199 blocked for more than 120 seconds. [ 604.909674] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 604.909676] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 604.909678] fdisk D 0 2199 2198 0x00000004 [ 604.909681] Call Trace: [ 604.909684] __schedule+0x297/0x8b0 [ 604.909688] schedule+0x2c/0x80 [ 604.909690] schedule_preempt_disabled+0xe/0x10 [ 604.909693] __mutex_lock.isra.2+0x18c/0x4d0 [ 604.909697] __mutex_lock_slowpath+0x13/0x20 [ 604.909700] ? __mutex_lock_slowpath+0x13/0x20 [ 604.909702] mutex_lock+0x2f/0x40 [ 604.909705] __blkdev_get+0x71/0x4c0 [ 604.909708] blkdev_get+0x129/0x320 [ 604.909710] ? __fsnotify_parent+0x96/0x120 [ 604.909714] ? security_capable+0x4e/0x70 [ 604.909717] blkdev_open+0x95/0xf0 [ 604.909721] do_dentry_open+0x1c2/0x310 [ 604.909723] ? __inode_permission+0x5b/0x160 [ 604.909726] ? bd_acquire+0xd0/0xd0 [ 604.909729] vfs_open+0x4f/0x80 [ 604.909732] path_openat+0x66e/0x1770 [ 604.909735] do_filp_open+0x9b/0x110 [ 604.909739] ? __check_object_size+0xaf/0x1b0 [ 604.909742] ? __alloc_fd+0x46/0x170 [ 604.909746] do_sys_open+0x1bb/0x2c0 [ 604.909748] ? do_sys_open+0x1bb/0x2c0 [ 604.909752] SyS_openat+0x14/0x20 [ 604.909755] do_syscall_64+0x73/0x130 [ 604.909759] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 604.909760] RIP: 0033:0x7f7bf2007c8e [ 604.909762] RSP: 002b:00007ffde2a82080 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 604.909764] RAX: ffffffffffffffda RBX: 000055b725656400 RCX: 00007f7bf2007c8e [ 604.909766] RDX: 0000000000080002 RSI: 00007ffde2a827c3 RDI: 00000000ffffff9c [ 604.909767] RBP: 0000000000000000 R08: 000000000000000a R09: 6d6572206c6c6977 [ 604.909768] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7bf29bd444 [ 604.909769] R13: 00007ffde2a827c3 R14: 0000000000000000 R15: 0000000000000000 [ 725.800041] INFO: task fdisk:1798 blocked for more than 120 seconds. [ 725.800050] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 725.800052] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 725.800056] fdisk D 0 1798 1728 0x00000000 [ 725.800060] Call Trace: [ 725.800071] __schedule+0x297/0x8b0 [ 725.800076] ? fdatawait_one_bdev+0x20/0x20 [ 725.800079] schedule+0x2c/0x80 [ 725.800083] io_schedule+0x16/0x40 [ 725.800088] wait_on_page_bit_common+0xd8/0x160 [ 725.800091] ? page_cache_tree_insert+0xe0/0xe0 [ 725.800095] __filemap_fdatawait_range+0xfa/0x160 [ 725.800099] ? __filemap_fdatawrite_range+0xc1/0x100 [ 725.800102] ? __filemap_fdatawrite_range+0xcd/0x100 [ 725.800106] ? __sync_filesystem+0x60/0x60 [ 725.800110] filemap_fdatawait_keep_errors+0x1e/0x40 [ 725.800113] fdatawait_one_bdev+0x16/0x20 [ 725.800117] iterate_bdevs+0xb7/0x160 [ 725.800120] sys_sync+0x7e/0xb0 [ 725.800124] do_syscall_64+0x73/0x130 [ 725.800128] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 725.800132] RIP: 0033:0x7f2fcff17287 [ 725.800134] RSP: 002b:00007fffbbea61a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a2 [ 725.800137] RAX: ffffffffffffffda RBX: 000056096b767400 RCX: 00007f2fcff17287 [ 725.800139] RDX: 0000000000000000 RSI: 000056096b766018 RDI: 000056096b767400 [ 725.800141] RBP: 00007fffbbea82d8 R08: 000000000000000a R09: 7472617020656854 [ 725.800143] R10: 0000000000000008 R11: 0000000000000202 R12: 000056096a25b198 [ 725.800145] R13: 0000000000000000 R14: 000056096a25b198 R15: 0000000000000000 [ 725.800172] INFO: task sync:2149 blocked for more than 120 seconds. [ 725.800177] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 725.800179] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 725.800183] sync D 0 2149 1821 0x00000004 [ 725.800186] Call Trace: [ 725.800190] __schedule+0x297/0x8b0 [ 725.800193] schedule+0x2c/0x80 [ 725.800196] schedule_preempt_disabled+0xe/0x10 [ 725.800199] __mutex_lock.isra.2+0x18c/0x4d0 [ 725.800203] ? wait_woken+0x80/0x80 [ 725.800206] ? fdatawait_one_bdev+0x20/0x20 [ 725.800209] __mutex_lock_slowpath+0x13/0x20 [ 725.800212] ? __mutex_lock_slowpath+0x13/0x20 [ 725.800214] mutex_lock+0x2f/0x40 [ 725.800217] iterate_bdevs+0xa0/0x160 [ 725.800220] sys_sync+0x70/0xb0 [ 725.800223] do_syscall_64+0x73/0x130 [ 725.800227] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 725.800229] RIP: 0033:0x7f6707b3f287 [ 725.800230] RSP: 002b:00007ffd0e393dc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 [ 725.800233] RAX: ffffffffffffffda RBX: 00007ffd0e393ef8 RCX: 00007f6707b3f287 [ 725.800234] RDX: 00007f6707e16001 RSI: 0000000000000000 RDI: 00007f6707bdd4b0 [ 725.800235] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 725.800237] R10: 0000564af80d2010 R11: 0000000000000246 R12: 0000000000000001 [ 725.800238] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 725.800241] INFO: task fdisk:2199 blocked for more than 120 seconds. [ 725.800244] Tainted: G OE 4.15.0-15-generic #16-Ubuntu [ 725.800246] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 725.800248] fdisk D 0 2199 2198 0x00000004 [ 725.800251] Call Trace: [ 725.800254] __schedule+0x297/0x8b0 [ 725.800258] schedule+0x2c/0x80 [ 725.800260] schedule_preempt_disabled+0xe/0x10 [ 725.800263] __mutex_lock.isra.2+0x18c/0x4d0 [ 725.800267] __mutex_lock_slowpath+0x13/0x20 [ 725.800270] ? __mutex_lock_slowpath+0x13/0x20 [ 725.800273] mutex_lock+0x2f/0x40 [ 725.800275] __blkdev_get+0x71/0x4c0 [ 725.800278] blkdev_get+0x129/0x320 [ 725.800281] ? __fsnotify_parent+0x96/0x120 [ 725.800285] ? security_capable+0x4e/0x70 [ 725.800288] blkdev_open+0x95/0xf0 [ 725.800291] do_dentry_open+0x1c2/0x310 [ 725.800294] ? __inode_permission+0x5b/0x160 [ 725.800296] ? bd_acquire+0xd0/0xd0 [ 725.800299] vfs_open+0x4f/0x80 [ 725.800302] path_openat+0x66e/0x1770 [ 725.800306] do_filp_open+0x9b/0x110 [ 725.800309] ? __check_object_size+0xaf/0x1b0 [ 725.800313] ? __alloc_fd+0x46/0x170 [ 725.800316] do_sys_open+0x1bb/0x2c0 [ 725.800319] ? do_sys_open+0x1bb/0x2c0 [ 725.800322] SyS_openat+0x14/0x20 [ 725.800325] do_syscall_64+0x73/0x130 [ 725.800329] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 725.800331] RIP: 0033:0x7f7bf2007c8e [ 725.800332] RSP: 002b:00007ffde2a82080 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 725.800335] RAX: ffffffffffffffda RBX: 000055b725656400 RCX: 00007f7bf2007c8e [ 725.800336] RDX: 0000000000080002 RSI: 00007ffde2a827c3 RDI: 00000000ffffff9c [ 725.800338] RBP: 0000000000000000 R08: 000000000000000a R09: 6d6572206c6c6977 [ 725.800339] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7bf29bd444 [ 725.800340] R13: 00007ffde2a827c3 R14: 0000000000000000 R15: 0000000000000000 ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-15-generic 4.15.0-15.16 ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15 Uname: Linux 4.15.0-15-generic x86_64 ApportVersion: 2.20.9-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: lgb 1463 F.... pulseaudio /dev/snd/controlC0: lgb 1463 F.... pulseaudio /dev/snd/controlC2: lgb 1463 F.... pulseaudio CurrentDesktop: XFCE Date: Mon Apr 9 17:11:31 2018 HibernationDevice: RESUME=UUID=c92777cb-b700-4a8e-b937-1ed4983fecb1 InstallationDate: Installed on 2015-07-10 (1003 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422) IwConfig: eth0 no wireless extensions. lo no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-15-generic root=UUID=d203063e-78c0-425a-bee2-0e3ecb4ea74c ro quiet splash scsi_mod.use_blk_mq=1 vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-15-generic N/A linux-backports-modules-4.15.0-15-generic N/A linux-firmware 1.173 RfKill: SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2017-06-20 (293 days ago) dmi.bios.date: 02/05/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.90 dmi.board.name: FM2A88M Extreme4+ dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.90:bd02/05/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88MExtreme4+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. 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