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Add a check to prevent a crash when CSP directives are used with chrome content

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Chrome content uses System Principle and this kind of speculative preloading of CSP just won't work.
This commit is contained in:
NTD 2018-06-02 09:44:18 -04:00 • committed by Roy Tam
commit 53005879e6
1 changed files with 6 additions and 1 deletions
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7
parser/html/nsHtml5TreeOpExecutor.cpp
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@ -1041,12 +1041,17 @@ nsHtml5TreeOpExecutor::AddSpeculationCSP(const nsAString& aCSP)
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
nsIPrincipal* principal = mDocument->NodePrincipal();
nsCOMPtr<nsIPrincipal> principal = mDocument->NodePrincipal();
nsCOMPtr<nsIContentSecurityPolicy> preloadCsp;
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(mDocument);
nsresult rv = principal->EnsurePreloadCSP(domDoc, getter_AddRefs(preloadCsp));
NS_ENSURE_SUCCESS_VOID(rv);
if (!preloadCsp) {
// XXX: System principals can't preload CSP. We're done here.
return;
}
// please note that meta CSPs and CSPs delivered through a header need
// to be joined together.
rv = preloadCsp->AppendPolicy(aCSP,