Fix potential handle leak when apr_proc_create() is used from from multiple

threads on Windows.

* threadproc/win32/proc.c
  (apr_proc_create): Close our side of pipes before releasing lock: otherwise
   they could like to other process when apr_proc_create() is used from from
   multiple threads.

git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1906885 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 18 insertions, 9 deletions

diff --git a/CHANGES b/CHANGES
index bbcd3b594..21fe5c497 100644
--- a/CHANGES
+++ b/CHANGES
@@ -271,6 +271,9 @@ Changes for APR 2.0.0
   *) apr_proc_create(): Fix incorrect error handling when pipes are redirected
      on Windows [Ivan Zhakov]
 
+  *) apr_proc_create(): Fix potential handle leak when apr_proc_create() is used
+     from from multiple threads on Windows [Ivan Zhakov]
+
 Changes for APR and APR-util 1.7.x and later:
 
   *) http://svn.apache.org/viewvc/apr/apr/branches/1.7.x/CHANGES?view=markup
diff --git a/threadproc/win32/proc.c b/threadproc/win32/proc.c
index 0458c1db3..af9d56d8a 100644
--- a/threadproc/win32/proc.c
+++ b/threadproc/win32/proc.c
@@ -915,6 +915,21 @@ APR_DECLARE(apr_status_t) apr_proc_create(apr_proc_t *new,
                 SetHandleInformation(GetStdHandle(STD_ERROR_HANDLE),
                                      stderr_reset, stderr_reset);
         }
+
+        /* Close our side of pipes before releasing lock: otherwise they
+         * could like to other process when apr_proc_create() is used from
+         * from multiple threads.
+         */
+        if ((attr->child_in) && (attr->child_in != &no_file)) {
+            apr_file_close(attr->child_in);
+        }
+        if ((attr->child_out) && (attr->child_out != &no_file)) {
+            apr_file_close(attr->child_out);
+        }
+        if ((attr->child_err) && (attr->child_err != &no_file)) {
+            apr_file_close(attr->child_err);
+        }
+
         /* RELEASE CRITICAL SECTION
          * The state of the inherited handles has been restored.
          */
@@ -933,15 +948,6 @@ APR_DECLARE(apr_status_t) apr_proc_create(apr_proc_t *new,
     new->hproc = pi.hProcess;
     new->pid = pi.dwProcessId;
 
-    if ((attr->child_in) && (attr->child_in != &no_file)) {
-        apr_file_close(attr->child_in);
-    }
-    if ((attr->child_out) && (attr->child_out != &no_file)) {
-        apr_file_close(attr->child_out);
-    }
-    if ((attr->child_err) && (attr->child_err != &no_file)) {
-        apr_file_close(attr->child_err);
-    }
     CloseHandle(pi.hThread);
 
     return APR_SUCCESS;