Backport of Fix bug #69522 - do not allow int overflow

Julien Pauli · Julien Pauli · commit 658b9b0ab26e · 2015-05-13T11:44:55.000+02:00
diff --git a/ext/standard/pack.c b/ext/standard/pack.c
@@ -759,7 +759,7 @@ PHP_FUNCTION(unpack)
 							len = size * 2;
 						} 
 
-						if (argb > 0) {	
+						if (len > 0 && argb > 0) {	
 							len -= argb % 2;
 						}
 
