[OpenAFS] Openafs-1.6.5 client crash when update the OPTIONS in afs config file

[Sergio Gelato]

* huangql [2014-12-24 17:46:19 +0800]:
> I failed to restart afs service after I changed OPTIONS value in /etc/sysconfig/afs file.

What was the old value, and what did you change it to?

> At this time, I need to reboot the machine to make the new configuration validate.

Are you saying that afsd crashes on service restart but not when it is started
for the first time after a reboot (with the same options)?

> Openafs version: 1.6.5

A bit old. You may want to check the change logs of later versions for
potentially relevant bug fixes.

> Os version: Scientific Linux release 6.5 (Carbon)  2.6.32-431.el6.x86_64 
> 
> I got the error message as following:
> 
> [root@bws0609 ~]# /etc/init.d/afs restart
> Stopping AFS client..... 
> Sending all processes using /afs the TERM signal ...       [  OK  ]
> Sending all processes using /afs the KILL signal ...       [  OK  ]
> Starting AFS client..... 
> /etc/init.d/afs: line 230: 26271 Segmentation fault      /usr/vice/etc/afsd ${AFSD_OPTIONS}

Has a core file been left behind? If so, could you extract a backtrace from it?

> Dec 24 17:30:29 bws0609 kernel: Starting AFS cache scan...
> Dec 24 17:30:29 bws0609 kernel: afsd[26271]: segfault at 18 ip 0000003736679753 sp 00007fff5f346fa0 error 4 in libc-2.12.so[3736600000+18a000]

To me this looks like an attempt to dereference a null pointer to a struct
(with the component of interest being at offset 0x18). A backtrace might
help one figure out where that unexpected null pointer came from.