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While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 2013019
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
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the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2013019
Title:
ubuntu_nbd_smoke_test- failure with lunar/linux 6.2
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Lunar:
Incomplete
Bug description:
[Impact]
nbd smoke test is triggering the following hung task timeout trace
with lunar/linux 6.2:
615 10:58:25 DEBUG| [stdout] [ 484.429923] INFO: task
systemd-udevd:16656 blocked for more than 120 seconds.
616 10:58:25 DEBUG| [stdout] [ 484.431061]
Not tainted 6.2.0-19-generic #19-Ubuntu
617 10:58:25 DEBUG| [stdout] [ 484.431909] "echo 0
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
618 10:58:25 DEBUG| [stdout] [ 484.433101]
task:systemd-udevd state:D stack:0 pid:16656 ppid:342 flags:0x00000805
619 10:58:25 DEBUG| [stdout] [ 484.433109] Call
trace:
620 10:58:25 DEBUG| [stdout] [ 484.433112]
__switch_to+0xbc/0x100
621 10:58:25 DEBUG| [stdout] [ 484.433121]
__schedule+0x2fc/0x7b0
622 10:58:25 DEBUG| [stdout] [ 484.433126]
schedule+0x68/0x160
623 10:58:25 DEBUG| [stdout] [ 484.433129]
schedule_preempt_disabled+0x30/0x60
624 10:58:25 DEBUG| [stdout] [ 484.433134]
__mutex_lock.constprop.0+0x2f4/0x670
625 10:58:25 DEBUG| [stdout] [ 484.433139]
__mutex_lock_slowpath+0x20/0x40
626 10:58:25 DEBUG| [stdout] [ 484.433143]
mutex_lock+0x98/0xc4
627 10:58:25 DEBUG| [stdout] [ 484.433147]
blkdev_get_by_dev.part.0+0x11c/0x320
628 10:58:25 DEBUG| [stdout] [ 484.433153]
blkdev_get_by_dev+0x84/0xb0
629 10:58:25 DEBUG| [stdout] [ 484.433158]
blkdev_open+0x74/0xd0
630 10:58:25 DEBUG| [stdout] [ 484.433163]
do_dentry_open+0x1e4/0x4b4
631 10:58:25 DEBUG| [stdout] [ 484.433167]
vfs_open+0x38/0x64
632 10:58:25 DEBUG| [stdout] [ 484.433171]
do_open+0x350/0x430
633 10:58:25 DEBUG| [stdout] [ 484.433177]
path_openat+0x144/0x290
634 10:58:25 DEBUG| [stdout] [ 484.433180]
do_filp_open+0xac/0x180
635 10:58:25 DEBUG| [stdout] [ 484.433183]
do_sys_openat2+0xf0/0x1ac
636 10:58:25 DEBUG| [stdout] [ 484.433188]
__arm64_sys_openat+0x70/0xd0
637 10:58:25 DEBUG| [stdout] [ 484.433192]
invoke_syscall+0x7c/0x124
638 10:58:25 DEBUG| [stdout] [ 484.433196]
el0_svc_common.constprop.0+0x1a4/0x1cc
639 10:58:25 DEBUG| [stdout] [ 484.433200]
do_el0_svc+0x38/0x60
640 10:58:25 DEBUG| [stdout] [ 484.433203]
el0_svc+0x30/0xe0
641 10:58:25 DEBUG| [stdout] [ 484.433208]
el0t_64_sync_handler+0x11c/0x150
642 10:58:25 DEBUG| [stdout] [ 484.433213]
el0t_64_sync+0x1a8/0x1ac
This trace seems to happen also with 6.1. In 5.19 the trace doesn't
happen, but the test is also broken, because it's not possible to
read/write from/to the nbd device that is created (/dev/nbd0).
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