MFH: Improve offset check inside shmop_write().

diff --git a/ext/shmop/shmop.c b/ext/shmop/shmop.c
index 47e3e226e5d7ce24c8f85b2d5de96d0282dca743..2bc32e8138572241a905773ec27881cad21bf525 100644 (file)
--- a/ext/shmop/shmop.c
+++ b/ext/shmop/shmop.c
@@ -316,7 +316,7 @@ PHP_FUNCTION(shmop_write)
                RETURN_FALSE;
        }
 
-       if (offset > shmop->size) {
+       if (offset < 0 || offset > shmop->size) {
                php_error_docref(NULL TSRMLS_CC, E_WARNING, "offset out of range");
                RETURN_FALSE;
        }