Fix back-shell realloc bug (reverting version to 1.2.11re)

CHANGES

 OpenLDAP Change Log
 
-Changes included in OpenLDAP 1.2.12 Release Engineering
-	CVS Tag: OPENLDAP_REL_ENG_1_2_12
-	<insert changes here>
-
 Changes included in OpenLDAP 1.2.11
 	CVS Tag: OPENLDAP_REL_ENG_1_2_11
 	Fixed /tmp races in ud, ldapsearch, ldbmtest and slurpd
@@ -16,6 +12,7 @@ Changes included in OpenLDAP 1.2.11
 	Fixed ACL groups member matching
 	Raise MAXDBCACHE to 128 (ITS#512)
 	Fixed slapd client_addr crash (ITS#579)
+	Fixed back-shell realloc bug (ITS#506)
 	Build Environment
 		Update res_search detection
 		Detect and use getpassphrase() and getpass()

build/version

-1.2.12-Engineering
+1.2.11-Engineering

servers/slapd/back-shell/result.c

@@ -42,8 +42,10 @@ read_and_send_results(
 		}
 		len = strlen( line );
 		while ( bp + len - buf > bsize ) {
+			size_t offset = bp - buf;
 			bsize += BUFSIZ;
 			buf = (char *) ch_realloc( buf, bsize );
+			bp = &buf[offset];
 		}
 		strcpy( bp, line );
 		bp += len;