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syncpoint_manager: ensure handle is removable before removing

This commit is contained in:
Liam 2022-10-10 19:22:26 -04:00
parent c3cae9d992
commit b1cd6cec19
1 changed files with 11 additions and 1 deletions
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12
src/video_core/host1x/syncpoint_manager.cpp
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@ -36,7 +36,17 @@ SyncpointManager::ActionHandle SyncpointManager::RegisterAction(
void SyncpointManager::DeregisterAction(std::list<RegisteredAction>& action_storage,
ActionHandle& handle) {
std::unique_lock lk(guard);
action_storage.erase(handle);
// We want to ensure the iterator still exists prior to erasing it
// Otherwise, if an invalid iterator was passed in then it could lead to UB
// It is important to avoid UB in that case since the deregister isn't called from a locked
// context
for (auto it = action_storage.begin(); it != action_storage.end(); it++) {
if (it == handle) {
action_storage.erase(it);
return;
}
}
}
void SyncpointManager::DeregisterGuestAction(u32 syncpoint_id, ActionHandle& handle) {