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authorDavid Parks <daparks@mozilla.com>2019-12-06 12:28:18 +0100
committerwolfbeast <mcwerewolf@wolfbeast.com>2019-12-06 12:28:18 +0100
commit74f15fb2d6c0e6de7b15631aada9997d000bd8ac (patch)
tree9672fa8747ddd9e17c00f05da8987b9361dfe567 /dom/plugins/ipc/PluginInstanceChild.cpp
parent246bf49b0d637902cbc821232db60c40e123b80f (diff)
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Properly detect failure in receiving plugin NPObjects.
Properly handles NPError reporting and makes sure that, in the case of failure, it does not return junk for the NPObject.
Diffstat (limited to 'dom/plugins/ipc/PluginInstanceChild.cpp')
-rw-r--r--dom/plugins/ipc/PluginInstanceChild.cpp13
1 files changed, 8 insertions, 5 deletions
diff --git a/dom/plugins/ipc/PluginInstanceChild.cpp b/dom/plugins/ipc/PluginInstanceChild.cpp
index af9db9103..3f2cdbc13 100644
--- a/dom/plugins/ipc/PluginInstanceChild.cpp
+++ b/dom/plugins/ipc/PluginInstanceChild.cpp
@@ -310,9 +310,10 @@ PluginInstanceChild::InternalGetNPObjectForValue(NPNVariable aValue,
switch (aValue) {
case NPNVWindowNPObject:
if (!(actor = mCachedWindowActor)) {
+ result = NPERR_GENERIC_ERROR;
PPluginScriptableObjectChild* actorProtocol;
- CallNPN_GetValue_NPNVWindowNPObject(&actorProtocol, &result);
- if (result == NPERR_NO_ERROR) {
+ if (CallNPN_GetValue_NPNVWindowNPObject(&actorProtocol, &result) &&
+ result == NPERR_NO_ERROR) {
actor = mCachedWindowActor =
static_cast<PluginScriptableObjectChild*>(actorProtocol);
NS_ASSERTION(actor, "Null actor!");
@@ -324,10 +325,10 @@ PluginInstanceChild::InternalGetNPObjectForValue(NPNVariable aValue,
case NPNVPluginElementNPObject:
if (!(actor = mCachedElementActor)) {
+ result = NPERR_GENERIC_ERROR;
PPluginScriptableObjectChild* actorProtocol;
- CallNPN_GetValue_NPNVPluginElementNPObject(&actorProtocol,
- &result);
- if (result == NPERR_NO_ERROR) {
+ if (CallNPN_GetValue_NPNVPluginElementNPObject(&actorProtocol, &result) &&
+ result == NPERR_NO_ERROR) {
actor = mCachedElementActor =
static_cast<PluginScriptableObjectChild*>(actorProtocol);
NS_ASSERTION(actor, "Null actor!");
@@ -338,6 +339,7 @@ PluginInstanceChild::InternalGetNPObjectForValue(NPNVariable aValue,
break;
default:
+ result = NPERR_GENERIC_ERROR;
NS_NOTREACHED("Don't know what to do with this value type!");
}
@@ -434,6 +436,7 @@ PluginInstanceChild::NPN_GetValue(NPNVariable aVar,
case NPNVWindowNPObject: // Intentional fall-through
case NPNVPluginElementNPObject: {
NPObject* object;
+ *((NPObject**)aValue) = nullptr;
NPError result = InternalGetNPObjectForValue(aVar, &object);
if (result == NPERR_NO_ERROR) {
*((NPObject**)aValue) = object;