ITS#6978 bail out on invalid LDIF

CHANGES

@@ -11,6 +11,7 @@ OpenLDAP 2.4.26 Engineering
 	Fixed libldap ASYNC TLS setup (ITS#6828)
 	Fixed libldap with missing \n terminations (ITS#6947)
 	Fixed tools double free (ITS#6946)
+	Fixed ldapmodify SEGV on invalid LDIF (ITS#6978)
 	Added slapd extra_attrs database option (ITS#6513)
 	Fixed slapd asserts (ITS#6932)
 	Fixed slapd configfile param on windows (ITS#6933)

clients/tools/ldapmodify.c

@@ -449,7 +449,7 @@ process_ldif_rec( char *rbuf, int linenum )
 			fprintf( stderr, _("%s: invalid format (line %d) entry: \"%s\"\n"),
 				prog, linenum+i, dn == NULL ? "" : dn );
 			rc = LDAP_PARAM_ERROR;
-			break;
+			goto leave;
 		}
 		freeval[i] = freev;