(ITS#4394) Fix Segfault in auditlog.c

[richter@ecos.de]

Full_Name: Gerald Richter
Version: 2.3.19
OS: Linux 2.4
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (194.95.226.11)


The auditlog overlay causes a segfault when no dn for the user performing the
operation is available, like it happens on the syncrepl consumer during an
update from the master. The following patch fixes this problem:

--- ./servers/slapd/overlays/auditlog.c~	Thu Feb  9 21:16:40 2006
+++ ./servers/slapd/overlays/auditlog.c	Thu Feb  9 21:55:52 2006
@@ -72,7 +72,8 @@
 			what = "add";
 			for(a = op->ora_e->e_attrs; a; a = a->a_next)
 				if( a->a_desc == slap_schema.si_ad_modifiersName ) {
-					who = a->a_vals[0].bv_val;
+					if (a->a_vals)
+						who = a->a_vals[0].bv_val;
 					break;
 				}
 			break;
@@ -80,7 +81,8 @@
 			what = "modify";
 			for(m = op->orm_modlist; m; m = m->sml_next)
 				if( m->sml_desc == slap_schema.si_ad_modifiersName ) {
-					who = m->sml_values[0].bv_val;
+					if (m->sml_values)
+						who = m->sml_values[0].bv_val;
 					break;
 				}
 			break;