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Bug 1738237, don't try to create too large string buffers, r=mccr8, a=RyanVM

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roytam1 2021-12-14 22:40:20 +08:00
commit 6036639e99
1 changed files with 6 additions and 0 deletions
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6
dom/base/nsStructuredCloneContainer.cpp
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@ -15,6 +15,7 @@
#include "xpcpublic.h"
#include "mozilla/Base64.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/dom/ScriptSettings.h"
using namespace mozilla;
@ -138,6 +139,11 @@ nsStructuredCloneContainer::GetDataAsBase64(nsAString &aOut)
auto iter = Data().Start();
size_t size = Data().Size();
CheckedInt<nsAutoCString::size_type> sizeCheck(size);
if (!sizeCheck.isValid()) {
return NS_ERROR_FAILURE;
}
nsAutoCString binaryData;
binaryData.SetLength(size);
Data().ReadBytes(iter, binaryData.BeginWriting(), size);