commit cfa7123ef108452dd402e3cdcec772be28872e2f
author Victor Stinner <victor.stinner@haypocalc.com> Fri Apr 08 12:48:15 2011 +0200
committer Victor Stinner <victor.stinner@haypocalc.com> Fri Apr 08 12:48:15 2011 +0200
tree 679f3380a96b416bb75a8e40e1488a016a7a2045
parent 7ede59d77a9b21c5c021d1b9a4289aba11509fdd

faulthandler: fix unregister() if it is called before register()

Fix a crash: don't read from NULL.

Modules/faulthandler.c

diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 76cadf3..1132036 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -694,6 +694,9 @@
     if (!check_signum(signum))
         return NULL;
 
+    if (user_signals == NULL)
+        Py_RETURN_FALSE;
+
     user = &user_signals[signum];
     change = faulthandler_unregister(user, signum);
     return PyBool_FromLong(change);