From 9eb32f4340a079e497dca03de3ebb8f62a2cdcb5 Mon Sep 17 00:00:00 2001
From: Jeffrey Stedfast <fejj@gnome.org>
Date: Tue, 20 Dec 2011 21:52:35 -0500
Subject: [PATCH] Protect against NULL sym string.

---
 tracker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tracker.c b/tracker.c
index dfdbec59..ec21e177 100644
--- a/tracker.c
+++ b/tracker.c
@@ -825,7 +825,7 @@ lookup_kernel_symbol (gulong address)
      * Below we filter out the [irq stack]
      */
     i = 0;
-    while (skip_kernel_symbols[i][0] != '\0')
+    while (sym && skip_kernel_symbols[i][0] != '\0')
     {
 	if (strcmp (sym, skip_kernel_symbols[i]) == 0)
 	{