[krbdev.mit.edu #6777] Segmentation fault in krb library (sn2princ.c) if realm not resolved

[Greg Hudson via RT]

[tlyu - Fri Sep 17 14:46:43 2010]:
> Perhaps strdup() on AIX can return NULL for a zero-length string?  For
> that matter, does malloc() on AIX return NULL for a zero argument?

I don't think it's fruitful to speculate, only to step through in a 
debugger.

(krb5int_build_principal_va() would not invoke malloc(0) if the realm is 
empty.  It would invoke strdup("") but a lot more software would break on 
AIX if it's strdup were so broken as to return NULL in that case.)