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tvg_loader: make sure the pointer does not exceed the size

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Michal Maciola 2021-08-24 14:59:54 +02:00 • committed by Hermet Park
parent d599f744c8
commit fe474856b9
2 changed files with 5 additions and 1 deletions
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1
src/lib/tvgBinaryDesc.h
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@ -35,6 +35,7 @@ using TvgBinFlag = TvgBinByte;
//Header //Header
#define TVG_HEADER_SIZE 33 //TVG_HEADER_SIGNATURE_LENGTH + TVG_HEADER_VERSION_LENGTH + 2*SIZE(float) + TVG_HEADER_RESERVED_LENGTH + TVG_HEADER_COMPRESS_SIZE
#define TVG_HEADER_SIGNATURE "ThorVG" #define TVG_HEADER_SIGNATURE "ThorVG"
#define TVG_HEADER_SIGNATURE_LENGTH 6 #define TVG_HEADER_SIGNATURE_LENGTH 6
#define TVG_HEADER_VERSION "000400" //Major 00, Minor 04, Micro 00 #define TVG_HEADER_VERSION "000400" //Major 00, Minor 04, Micro 00

3
src/loaders/tvg/tvgTvgLoader.cpp
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@ -50,6 +50,9 @@ bool TvgLoader::readHeader()
{ {
if (!ptr) return false; if (!ptr) return false;
//Make sure the size is large enough to hold the header
if (size < TVG_HEADER_SIZE) return false;
//1. Signature //1. Signature
if (memcmp(ptr, TVG_HEADER_SIGNATURE, TVG_HEADER_SIGNATURE_LENGTH)) return false; if (memcmp(ptr, TVG_HEADER_SIGNATURE, TVG_HEADER_SIGNATURE_LENGTH)) return false;
ptr += TVG_HEADER_SIGNATURE_LENGTH; ptr += TVG_HEADER_SIGNATURE_LENGTH;