Processed: Re: Bug#1034346: usrmerge: fails to install on Xen VPS due to /lib/modules mount

[Debian Bug Tracking System]

Processing control commands:

> severity -1 normal
Bug #1034346 [usrmerge] usrmerge: fails to install on Xen VPS due to 
/lib/modules mount
Severity set to 'normal' from 'serious'

-- 
1034346: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1034346
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Bug#1034346: usrmerge: fails to install on Xen VPS due to /lib/modules mount

[Marco d'Itri]

Control: severity -1 normal

On Apr 13, Hans-Christoph Steiner  wrote:

> I have some VPSes which are based on Xen, so the kernel comes from the host,
> and the VPS has no kernel installed.  /lib/modules is mounted but not via
> /etc/fstab.  When trying to upgrade from bullseye to bookworm, I get:
Then fix it as suggested, but not via fstab?
Looks like this is a documentation issue.
What do you think should be changed here, exactly?

> To continue the conversion please:
> - replace '/lib/modules/' with '/usr/lib/modules/' in /etc/fstab
> - reboot
> - try again

-- 
ciao,
Marco


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Bug#1034346: usrmerge: fails to install on Xen VPS due to /lib/modules mount

[Hans-Christoph Steiner]

Package: usrmerge
Version: 25
Severity: serious

I have some VPSes which are based on Xen, so the kernel comes from the host, and 
the VPS has no kernel installed.  /lib/modules is mounted but not via 
/etc/fstab.  When trying to upgrade from bullseye to bookworm, I get:


Preparing to unpack .../archives/usrmerge_35_all.deb ...
Unpacking usrmerge (35) ...
Setting up usrmerge (35) ...

FATAL ERROR:

/lib/modules/ is a mount point.
Probably this system is using User Mode Linux.

To continue the conversion please:
- replace '/lib/modules/' with '/usr/lib/modules/' in /etc/fstab
- reboot
- try again

E: usrmerge failed.
dpkg: error processing package usrmerge (--configure):
 installed usrmerge package post-installation script subprocess returned error 
exit status 1

Errors were encountered while processing:
 usrmerge
E: Sub-process /usr/bin/dpkg returned an error code (1)


Here is some more info which should hopefully be helpful:

# umount /lib/modules/
umount: /lib/modules/: target is busy.
# lsof /lib/modules
COMMANDPID USER  FD   TYPE DEVICE SIZE/OFF NODE NAME
systemd-u 1145 root memREG   0,20   1503845 
/lib/modules/5.10.104/modules.symbols.bin
systemd-u 1145 root memREG   0,20   3224788 
/lib/modules/5.10.104/modules.alias.bin
systemd-u 1145 root memREG   0,20   119456   10 
/lib/modules/5.10.104/modules.dep.bin
systemd-u 1145 root memREG   0,20 76634 
/lib/modules/5.10.104/modules.builtin.bin

# ps -ef|grep 1145
root  1145 1  0 09:29 ?00:00:00 /lib/systemd/systemd-udevd
root 16599 25980  0 10:11 pts/100:00:00 grep 1145
# dpkg -l linux*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ NameVersion  Architecture Description
+++-===---===
un  linux-kernel-log-daemon   (no description available)
ii  linux-libc-dev:amd646.1.20-1 amd64Linux support headers for 
userspace development

# mount |grep /lib
modules on /lib/modules type tmpfs (rw,relatime,size=102400k,mode=700)
# cat /etc/fstab

/dev/xvda1  /   xfs defaults0   0
proc/proc   procdefaults0   0
#