Changing the last access time of a directory results in ERROR_SHARING_VIOLATION

[nedsociety]

Driver 5.45.0

Problem

On Python (3.9) I tried to run pip install comtypes within the sandbox which failed with:

    Complete output (4 lines):
    running egg_info
    C:\Users\ned\AppData\Local\Temp\pip-pip-egg-info-ey1uqbv6\comtypes.egg-info
    creating C:\Users\ned\AppData\Local\Temp\pip-pip-egg-info-ey1uqbv6\comtypes.egg-info
    error: [WinError 32] The process cannot access the file because it is being used by another process

Tracking the problem so far, I've narrowed the culprit down to:

• Trying to change the last access time of a directory inside a sandbox results in ERROR_SHARING_VIOLATION (32).
• It also happens when trying to change the directory access time for host directory for the second time. (as the first change will import the directory into the sandbox)

Minimal reproducing app

#include <Windows.h>
#include <stdexcept>
#include <string>
#include <iostream>

int main(int argc, char** argv) {
    try {
        if (argc < 2) {
            throw std::runtime_error("need argument");
        }

        HANDLE hFile = CreateFileA(argv[1], FILE_WRITE_ATTRIBUTES, 0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
        if (hFile == INVALID_HANDLE_VALUE) {
            throw std::runtime_error("failed to open");
        }

        FILETIME time;
        GetSystemTimeAsFileTime(&time);

        // Change the access time
        if (!SetFileTime(hFile, NULL, NULL, &time))
            throw std::runtime_error(std::to_string(GetLastError()));
        CloseHandle(hFile);
    }
    catch (std::runtime_error e) {
        std::cout << e.what() << "\n";
    }
    
    return 0;
}

Built as testapp.exe, then ran this app in Sandboxie:

C:\> mkdir testdir
C:\> testapp testdir
32
C:\> testapp hostdir
C:\> testapp hostdir
32

(ERROR_SHARING_VIOLATION is 32)

[DavidXanatos]

I have found the issue and fixed it for the next build, thank you for the great bug report