random process crashes in virtualbox guests (clocksource problem?)

[Michael <ml@hemathor.de>]

hey,

i run debian 11 on both host and guest and experience random process 
crashes in virtual box guests under load. i.e. just reading a lot of files 
from any disk on the host system causes the guests to randomly crash a 
process...

e.g. if i move a large file
 # mv -nv <source> <destination>

or if i do just
 # md5sum <file>

in fact, it doesn't really matter what i do, as long as it creates 
significant i/o traffic and is lasting longer than a couple of seconds.

in any case, the guest starts to complain with:

Jul 01 20:45:20 vmguest kernel: clocksource: timekeeping watchdog on CPU0: 
kvm-clock wd-wd read-back delay of 816732ns
Jul 01 20:45:20 vmguest kernel: clocksource: wd-tsc-wd read-back delay of 
2540783ns, clock-skew test skipped!

and, what is worse, processes start to randomly crash:
Jun 30 20:17:01 vmguest kernel: traps: sh[250946] general protection fault 
ip:7fb0c341708e sp:7ffec3154378 error:0 in 
libc-2.31.so[7fb0c33a6000+14b000]
Jul 01 00:00:02 vmguest kernel: traps: hostname[253617] general protection 
fault ip:7f905f2b24a6 sp:7fff44a30e30 error:0 in 
libc-2.31.so[7f905f299000+14b000]
Jul 01 00:53:01 vmguest kernel: traps: wget[254290] general protection 
fault ip:7f934bc23fda sp:7ffd716954d0 error:0 in 
libtasn1.so.6.6.0[7f934bc1a000+c000]

does anyone have any idea what the problem is? or where to turn to, do find 
a solution?

the only thing i found was an unresolved issue in the debian forum:
https://forums.debian.net/viewtopic.php?t=151851

any help would be much appreciated!

greetings...