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Code Issues Releases Wiki Activity

Add checks for incorrect sticker cache bytes.

This commit is contained in:
John Preston 2019-07-10 12:52:36 +02:00
parent b9d3ba621e
commit c3c6571835
1 changed files with 3 additions and 0 deletions
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3
Telegram/SourceFiles/lottie/lottie_cache.cpp
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@ -594,6 +594,9 @@ void Cache::prepareBuffers() {
} }
Cache::ReadResult Cache::readCompressedFrame() { Cache::ReadResult Cache::readCompressedFrame() {
if (_data.size() < _offset) {
return { false };
}
auto length = qint32(0); auto length = qint32(0);
const auto part = bytes::make_span(_data).subspan(_offset); const auto part = bytes::make_span(_data).subspan(_offset);
if (part.size() < sizeof(length)) { if (part.size() < sizeof(length)) {