Merge pull request #44371 from RevoluPowered/fix-parser-crash-mesh-geometry
[fbx] fix crash in FBX parser caused by mesh geometry
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commit
6956b01cb5
4 changed files with 11 additions and 6 deletions
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@ -128,7 +128,7 @@ Node *EditorSceneImporterFBX::import_scene(const String &p_path, uint32_t p_flag
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FBXDocParser::TokenizeBinary(tokens, (const char *)data.write().ptr(), (size_t)data.size());
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} else {
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print_verbose("[doc] is ascii");
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FBXDocParser::Tokenize(tokens, (const char *)data.write().ptr());
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FBXDocParser::Tokenize(tokens, (const char *)data.write().ptr(), (size_t)data.size());
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}
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// The import process explained:
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@ -182,7 +182,7 @@ MeshGeometry::MeshGeometry(uint64_t id, const ElementPtr element, const std::str
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// This is stupid, because it means we select them ALL not just the one we want.
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// but it's fine we can match by id.
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GetRequiredElement(top, layer_type_name);
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const ElementCollection &candidates = top->GetCollection(layer_type_name);
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ElementMap::const_iterator iter;
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@ -142,7 +142,7 @@ void ProcessDataToken(TokenList &output_tokens, const char *&start, const char *
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} // namespace
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// ------------------------------------------------------------------------------------------------
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void Tokenize(TokenList &output_tokens, const char *input) {
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void Tokenize(TokenList &output_tokens, const char *input, size_t length) {
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// line and column numbers numbers are one-based
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unsigned int line = 1;
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unsigned int column = 1;
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@ -152,8 +152,13 @@ void Tokenize(TokenList &output_tokens, const char *input) {
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bool pending_data_token = false;
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const char *token_begin = nullptr, *token_end = nullptr;
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for (const char *cur = input; *cur; column += (*cur == '\t' ? ASSIMP_FBX_TAB_WIDTH : 1), ++cur) {
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const char c = *cur;
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// input (starting string), *cur the current string, column +=
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// modified to fix strlen() and stop buffer overflow
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for (size_t x = 0; x < length; x++) {
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const char c = input[x];
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const char *cur = &input[x];
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column += (c == '\t' ? ASSIMP_FBX_TAB_WIDTH : 1);
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if (IsLineEnd(c)) {
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comment = false;
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@ -187,7 +187,7 @@ typedef std::vector<TokenPtr> TokenList;
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* @param output_tokens Receives a list of all tokens in the input data.
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* @param input_buffer Textual input buffer to be processed, 0-terminated.
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* @print_error if something goes wrong */
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void Tokenize(TokenList &output_tokens, const char *input);
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void Tokenize(TokenList &output_tokens, const char *input, size_t length);
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/** Tokenizer function for binary FBX files.
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*
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