Merge cherrypicks of [14947012, 14947430, 14947171, 14947470, 14947471, 14947013, 14947490] into security-aosp-pi-release
Change-Id: Ibd3cdcd1742622f369e8a9874a21ea8a8de7b05c
diff --git a/Parcel.cpp b/Parcel.cpp
index 096913f..f33c4d5 100644
--- a/Parcel.cpp
+++ b/Parcel.cpp
@@ -1564,6 +1564,19 @@
static_cast<uint64_t>(buffer_obj->parent_offset), parentOffset);
return false;
}
+
+ binder_buffer_object *parentBuffer =
+ reinterpret_cast<binder_buffer_object*>(mData + mObjects[parent]);
+ void* bufferInParent = *reinterpret_cast<void**>(
+ reinterpret_cast<uint8_t*>(parentBuffer->buffer) + parentOffset);
+ void* childBuffer = reinterpret_cast<void*>(buffer_obj->buffer);
+
+ if (bufferInParent != childBuffer) {
+ ALOGE("Buffer in parent %p differs from embedded buffer %p",
+ bufferInParent, childBuffer);
+ android_errorWriteLog(0x534e4554, "179289794");
+ return false;
+ }
}
return true;
@@ -1691,12 +1704,31 @@
size_t parent_buffer_handle,
size_t parent_offset) const
{
- status_t status;
uint64_t nativeHandleSize;
- size_t fdaParent;
+ status_t status = readUint64(&nativeHandleSize);
+ if (status != OK) {
+ return BAD_VALUE;
+ }
- status = readUint64(&nativeHandleSize);
- if (status != OK || nativeHandleSize == 0) {
+ if (nativeHandleSize == 0) {
+ // If !embedded, then parent_* vars are 0 and don't actually correspond
+ // to anything. In that case, we're actually reading this data into
+ // writable memory, and the handle returned from here will actually be
+ // used (rather than be ignored).
+ if (embedded) {
+ binder_buffer_object *parentBuffer =
+ reinterpret_cast<binder_buffer_object*>(mData + mObjects[parent_buffer_handle]);
+
+ void* bufferInParent = *reinterpret_cast<void**>(
+ reinterpret_cast<uint8_t*>(parentBuffer->buffer) + parent_offset);
+
+ if (bufferInParent != nullptr) {
+ ALOGE("Buffer in (handle) parent %p is not nullptr.", bufferInParent);
+ android_errorWriteLog(0x534e4554, "179289794");
+ return BAD_VALUE;
+ }
+ }
+
*handle = nullptr;
return status;
}
@@ -1706,6 +1738,7 @@
return BAD_VALUE;
}
+ size_t fdaParent;
if (embedded) {
status = readNullableEmbeddedBuffer(nativeHandleSize, &fdaParent,
parent_buffer_handle, parent_offset,
