[Webkit-unassigned] [Bug 190947] Post too much text to iFrame could crash webkit

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190947

--- Comment #4 from Chris Dumez <cdumez at apple.com> ---
Relevant code:
        RefPtr<FormData> httpBody = documentLoader->originalRequest().httpBody();
        if (httpBody && !httpBody->isEmpty()) {
            httpBodyAsString = httpBody->flattenToString();
            if (!httpBodyAsString.isEmpty()) {
                m_decodedHTTPBody = canonicalize(httpBodyAsString, TruncationStyle::None);
                if (m_decodedHTTPBody.find(isRequiredForInjection) == notFound)
                    m_decodedHTTPBody = String();
                if (m_decodedHTTPBody.length() >= minimumLengthForSuffixTree)
                    m_decodedHTTPBodySuffixTree = std::make_unique<SuffixTree<ASCIICodebook>>(m_decodedHTTPBody, suffixTreeDepth);
            }
        }

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