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Bug 1918028 - avoid potential future hang when cancelling Content Analysis WARN response a=diannaS

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Don't cache canceled CA results, as this can cause particular problem with WARN responses,
which shouldn't be in the cache.

Original Revision: https://phabricator.services.mozilla.com/D221880

Differential Revision: https://phabricator.services.mozilla.com/D222620
This commit is contained in:
Greg Stoll 2024-09-18 15:00:37 +00:00
parent 2577d7d689
commit 040ea06307
1 changed files with 37 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

35
toolkit/components/contentanalysis/ContentAnalysis.cpp
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@ -1089,9 +1089,15 @@ ContentAnalysis::TestOnlySetCACmdLineArg(bool aVal) {
nsresult ContentAnalysis::CancelWithError(nsCString aRequestToken,
nsresult aResult) {
LOGD(
"ContentAnalysis::CancelWithError dispatching to main thread for "
"request %s",
aRequestToken.get());
return NS_DispatchToMainThread(NS_NewCancelableRunnableFunction(
"ContentAnalysis::CancelWithError",
[aResult, aRequestToken = std::move(aRequestToken)]() mutable {
LOGD("ContentAnalysis::CancelWithError on main thread for request %s",
aRequestToken.get());
RefPtr<ContentAnalysis> owner = GetContentAnalysisFromService();
if (!owner) {
// May be shutting down
@ -1371,6 +1377,7 @@ void ContentAnalysis::DoAnalyzeRequest(
"ContentAnalysis::RunAnalyzeRequestTask::HandleResponse",
[pbResponse = std::move(pbResponse),
aRequestToCache = std::move(aRequestToCache)]() mutable {
LOGD("RunAnalyzeRequestTask on main thread about to send response");
RefPtr<ContentAnalysis> owner = GetContentAnalysisFromService();
if (!owner) {
// May be shutting down
@ -1384,11 +1391,33 @@ void ContentAnalysis::DoAnalyzeRequest(
return;
}
if (aRequestToCache) {
[&]() {
nsIContentAnalysisResponse::Action action;
if (NS_SUCCEEDED(response->GetAction(&action))) {
if (NS_FAILED(response->GetAction(&action))) {
LOGE("Content analysis couldn't get action from response!");
return;
}
nsCString responseRequestToken;
nsresult requestRv =
response->GetRequestToken(responseRequestToken);
if (NS_FAILED(requestRv)) {
LOGE(
"Content analysis couldn't get request token from response!");
return;
}
{
auto callbackMap = owner->mCallbackMap.Lock();
auto maybeCallbackData =
callbackMap->MaybeGet(responseRequestToken);
// This prevents caching cancelled results to avoid issues like
// bug 1918028.
if (maybeCallbackData.isSome() &&
!maybeCallbackData->Canceled()) {
owner->mCachedData.SetData(std::move(aRequestToCache), action);
}
}
}();
}
owner->IssueResponse(response);
}));
}
@ -1611,6 +1640,10 @@ NS_IMETHODIMP
ContentAnalysis::RespondToWarnDialog(const nsACString& aRequestToken,
bool aAllowContent) {
nsCString requestToken(aRequestToken);
LOGD(
"ContentAnalysis::RespondToWarnDialog dispatching to main thread for "
"request %s",
requestToken.get());
NS_DispatchToMainThread(NS_NewCancelableRunnableFunction(
"RespondToWarnDialog",
[aAllowContent, requestToken = std::move(requestToken)]() {