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-rw-r--r--libs/binder/IPCThreadState.cpp12
1 files changed, 10 insertions, 2 deletions
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index ef88181..af18e11 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -1083,8 +1083,16 @@ status_t IPCThreadState::executeCommand(int32_t cmd)
<< reinterpret_cast<const size_t*>(tr.data.ptr.offsets) << endl;
}
if (tr.target.ptr) {
- sp<BBinder> b((BBinder*)tr.cookie);
- error = b->transact(tr.code, buffer, &reply, tr.flags);
+ // We only have a weak reference on the target object, so we must first try to
+ // safely acquire a strong reference before doing anything else with it.
+ if (reinterpret_cast<RefBase::weakref_type*>(
+ tr.target.ptr)->attemptIncStrong(this)) {
+ error = reinterpret_cast<BBinder*>(tr.cookie)->transact(tr.code, buffer,
+ &reply, tr.flags);
+ reinterpret_cast<BBinder*>(tr.cookie)->decStrong(this);
+ } else {
+ error = UNKNOWN_TRANSACTION;
+ }
} else {
error = the_context_object->transact(tr.code, buffer, &reply, tr.flags);