fix #1662: QueryFullProcessImageNameW may fail with error code = 0 (W…

…in API bug?)
giampaolo · Jan 14, 2020 · efaa9e0 · efaa9e0
1 parent bc0168a
commit efaa9e0
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diff --git a/HISTORY.rst b/HISTORY.rst
@@ -21,6 +21,7 @@ XXXX-XX-XX
 - 1656_: [Windows] Process.memory_full_info() raises AccessDenied even for the
   current user and os.getpid().
 - 1660_: [Windows] Process.open_files() complete rewrite + check of errors.
+- 1662_: [Windows] process exe() may raise WinError 0.
 
 5.6.7
 =====

diff --git a/psutil/_psutil_windows.c b/psutil/_psutil_windows.c
@@ -463,7 +463,11 @@ psutil_proc_exe(PyObject *self, PyObject *args) {
 
     memset(exe, 0, MAX_PATH);
     if (QueryFullProcessImageNameW(hProcess, 0, exe, &size) == 0) {
-        PyErr_SetFromOSErrnoWithSyscall("QueryFullProcessImageNameW");
+        // https://github.com/giampaolo/psutil/issues/1662
+        if (GetLastError() == 0)
+            AccessDenied("QueryFullProcessImageNameW (forced EPERM)");
+        else
+            PyErr_SetFromOSErrnoWithSyscall("QueryFullProcessImageNameW");
         CloseHandle(hProcess);
         return NULL;
     }