[PATCH 1/2] tracing: Fix minor bugs for __unregister_ftrace_function_probe

[Atsushi Tsuji]

Fix the condition of strcmp for "*".
Also fix NULL pointer dereference when glob is NULL.

Signed-off-by: Atsushi Tsuji <a-tsuji@bk.jp.nec.com>
---
 kernel/trace/ftrace.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 8c804e2..5ef8f59 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2059,9 +2059,9 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 	int i, len = 0;
 	char *search;
 
-	if (glob && (strcmp(glob, "*") || !strlen(glob)))
+	if (glob && (strcmp(glob, "*") == 0 || !strlen(glob)))
 		glob = NULL;
-	else {
+	else if (glob) {
 		int not;
 
 		type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
-- 
1.5.5.1