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clamp .gz/.zip data: don't read more than it said would be available

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Glenn Maynard
2005-01-10 01:01:34 +00:00
parent 8d40bee10c
commit cde599f33a
1 changed files with 6 additions and 0 deletions
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stepmania/src/RageFileDriverDeflate.cpp
+6
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@@ -83,6 +83,12 @@ RageFileObjInflate::~RageFileObjInflate()
int RageFileObjInflate::ReadInternal( void *buf, size_t bytes ) int RageFileObjInflate::ReadInternal( void *buf, size_t bytes )
{ {
/* Don't read more than m_iUncompressedSize of data. If we don't do this, it's
* possible for a .gz to contain a header claiming 500k of data, but to actually
* contain much more deflated data. */
ASSERT_M( m_iFilePos <= m_iUncompressedSize, ssprintf("%i, %i",m_iFilePos, m_iUncompressedSize) );
bytes = min( bytes, size_t(m_iUncompressedSize-m_iFilePos) );
bool done=false; bool done=false;
int ret = 0; int ret = 0;
while( bytes && !done ) while( bytes && !done )