From 4fa08cc50f38e23cd8608abe9da1476ea3d8d6a3 Mon Sep 17 00:00:00 2001
From: Jonathan Lebon <jlebon@redhat.com>
Date: Fri, 7 Jun 2013 16:19:23 -0400
Subject: [PATCH] PR15044: ucontext.stp: fix name == NULL bug on error

The 'name' variable was not assigned a value if _stp_umod_lookup()
failed. This means the call to strlcpy() happened even though 'name'
was NULL. Now, name is always assigned a value, even if
_stp_umod_lookup() fails.
---
 tapset/linux/ucontext.stp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tapset/linux/ucontext.stp b/tapset/linux/ucontext.stp
index b2b045ee5..ba9c7d797 100644
--- a/tapset/linux/ucontext.stp
+++ b/tapset/linux/ucontext.stp
@@ -19,9 +19,8 @@ function umodname:string (addr:long) %{
   const char *name = NULL;
   _stp_umod_lookup(STAP_ARG_addr, current, &name, NULL, NULL);
   if (!name) {
-#if STAP_COMPAT_VERSION < STAP_VERSION(2,3) // PR15044
     name = "<unknown>";
-#else
+#if STAP_COMPAT_VERSION >= STAP_VERSION(2,3) // PR15044
     CONTEXT->last_error = "module cannot be found";
 #endif
   }
-- 
2.43.5