Comment # 16 on bug 1203539 from Takashi Iwai

Hmm, it's still not clear what went wrong, unfortunately.  Doesn't it have any
crash stack trace?

In anyway, I built a Leap 15.4 kernel with KASAN enabled, for checking the
memory corruptions.  A test kernel is found in OBS
home:tiwai:kernel:sle15-sp4-kasan repo,
 
http://download.opensuse.org/repositories/home:/tiwai:/kernel:/sle15-sp4-kasan/pool/

Could you try to download kernel-default.rpm, kernel-default-extra.rpm and
kernel-default-optional.rpm from there, and install them?  You might need to
pass --oldpackage option to zypper install.

Note that KMPs won't work with this kernel; e.g. if you have Nvidia driver, it
won't work.  And this kernel will be quite heavy, the performance must be
significantly dropped, so it's really only for debugging.

Please check the boot with this kernel and see whether it can catch something. 
It won't "fix" anything but it may show something earlier.