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Prevent passing NULL to memcpy parameter in parsing resources #332

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Prevent passing NULL to memcpy parameter in parsing resources #332

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13 changes: 10 additions & 3 deletions spirv_reflect.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3572,9 +3572,16 @@ static SpvReflectResult ParseStaticallyUsedResources(SpvReflectPrvParser* p_pars
++j;
}

memcpy(&p_used_accesses[used_acessed_count], p_parser->functions[j].accessed_variables,
p_parser->functions[j].accessed_variable_count * sizeof(SpvReflectPrvAccessedVariable));
used_acessed_count += p_parser->functions[j].accessed_variable_count;
SpvReflectPrvFunction* p_function = &p_parser->functions[j];

// Prevent NULL from being passed to memcpy, which is UB
if (p_function->accessed_variable_count == 0) {
continue;
}

memcpy(&p_used_accesses[used_acessed_count], p_function->accessed_variables,
p_function->accessed_variable_count * sizeof(SpvReflectPrvAccessedVariable));
used_acessed_count += p_function->accessed_variable_count;
}
SafeFree(p_called_functions);

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