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-rw-r--r--ext/com_dotnet/com_handlers.c5
-rw-r--r--ext/com_dotnet/tests/bug78694.phpt19
2 files changed, 24 insertions, 0 deletions
diff --git a/ext/com_dotnet/com_handlers.c b/ext/com_dotnet/com_handlers.c
index 66218cfae8..4278818511 100644
--- a/ext/com_dotnet/com_handlers.c
+++ b/ext/com_dotnet/com_handlers.c
@@ -123,6 +123,11 @@ static void com_write_dimension(zval *object, zval *offset, zval *value)
obj = CDNO_FETCH(object);
+ if (offset == NULL) {
+ php_com_throw_exception(DISP_E_BADINDEX, "appending to variants is not supported");
+ return;
+ }
+
if (V_VT(&obj->v) == VT_DISPATCH) {
ZVAL_COPY_VALUE(&args[0], offset);
ZVAL_COPY_VALUE(&args[1], value);
diff --git a/ext/com_dotnet/tests/bug78694.phpt b/ext/com_dotnet/tests/bug78694.phpt
new file mode 100644
index 0000000000..adf0c828ca
--- /dev/null
+++ b/ext/com_dotnet/tests/bug78694.phpt
@@ -0,0 +1,19 @@
+--TEST--
+Bug #78694 (Appending to a variant array causes segfault)
+--SKIPIF--
+<?php
+if (!extension_loaded('com_dotnet')) die('skip com_dotnet extension not available');
+?>
+--FILE--
+<?php
+foreach ([new com('WScript.Shell'), new variant([])] as $var) {
+ try {
+ $var[] = 42;
+ } catch (com_exception $ex) {
+ var_dump($ex->getMessage());
+ }
+}
+?>
+--EXPECT--
+string(38) "appending to variants is not supported"
+string(38) "appending to variants is not supported"