Xenforo gives SegFault after Debian 8 upgrade

[Alpha1]

My host tried to upgrade Debian 7 to 8. But this resulted in the following error:
child pid exit signal Segmentation fault (11)
There is no further information.

They had to restore the backup and go back to Debian 7.
Does anyone have a clue what the cause of this may be?

@eva2000 @Xon @MattW

 

[MattW]

Haven't used Debian in several years unfortunately.

 

[Snog]

After upgrading, check php.ini. There is most likely a syntax error.

If the 'memory_limit' looks like this...

memory_limit = 100

Change it to this..

memory_limit = 100M

There may be other places where that's needed, but you get the idea.

Other than that is could be apache modules (like mod_deflate) or other items causing the error. Without tracing, it's next to impossible to find.

 

[Alpha1]

My host says:

if we do a strace then we get the segfault in the logs. Through CLI we only got response if php was called on index.php. The process tries to approach something in the memory that it has no rights for. The kernel stops this and returns a segfault.