Bug in cv::FileStorage when the XML contains integer values larger INT_MAX #26829
Description
System Information
OpenCV version: 4.11.0
Operating System / Platform: Windows
Compiler: msvc 19.42.34436.0 (Visual Studio 2022)
Detailed description
There seems to be a problem in the cv::FileStorage when it contains integers larger than INT_MAX.
When reading the Name node from an XML file like this one below, we get an error in modules\core\src\persistence.cpp:2233.
The XML reads fine for OpenCV up to version 4.10.0, or with integer values smaller than INT_MAX.
<?xml version="1.0"?>
<opencv_storage>
<A>
<Value>2147483648</Value>
<Name>"image"</Name>
</A>
</opencv_storage>Output built with OpenCV 4.11.0
a is ok
b is ok
OpenCV(4.11.0) modules\core\src\persistence.cpp:2233: error: (-215:Assertion failed) key2 < fs->str_hash_data.size() in function 'cv::FileNode::operator []'
Output build with OpenCV 4.10.0
a is ok
b is ok
c is ok
Steps to reproduce
#include <iostream>
#include <opencv2/core/persistence.hpp>
int main() {
auto example_a = R"(<?xml version="1.0"?>
<opencv_storage>
<A>
<Value>2147483648</Value>
</A>
</opencv_storage>)";
auto example_b = R"(<?xml version="1.0"?>
<opencv_storage>
<A>
<Value>2147483647</Value>
<Name>"image"</Name>
</A>
</opencv_storage>)";
auto example_c = R"(<?xml version="1.0"?>
<opencv_storage>
<A>
<Value>2147483648</Value>
<Name>"image"</Name>
</A>
</opencv_storage>)";
std::string name;
cv::FileStorage fs;
try {
fs = cv::FileStorage(example_a, cv::FileStorage::READ | cv::FileStorage::MEMORY | cv::FileStorage::FORMAT_XML);
fs["A"]["Name"] >> name;
std::cout << "a is ok" << std::endl;
} catch (std::exception &e) {
std::cout << e.what() << std::endl;
}
try {
fs = cv::FileStorage(example_b, cv::FileStorage::READ | cv::FileStorage::MEMORY | cv::FileStorage::FORMAT_XML);
fs["A"]["Name"] >> name;
std::cout << "b is ok" << std::endl;
} catch (std::exception &e) {
std::cout << e.what() << std::endl;
}
try {
fs = cv::FileStorage(example_c, cv::FileStorage::READ | cv::FileStorage::MEMORY | cv::FileStorage::FORMAT_XML);
fs["A"]["Name"] >> name;
std::cout << "c is ok" << std::endl;
} catch (std::exception &e) {
std::cout << e.what() << std::endl;
}
return 0;
}
Issue submission checklist
- I report the issue, it's not a question
- I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
- I updated to the latest OpenCV version and the issue is still there
- There is reproducer code and related data files (videos, images, onnx, etc)