From: Li Zefan <lizf@cn.fujitsu.com>
Date: Thu, 14 Jan 2010 02:54:11 +0000 (+0800)
Subject: tracing/filters: Fix MATCH_MIDDLE_ONLY filter matching
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b2af211f284eb1bef19fbb85fc8ef551bb1e7460;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

tracing/filters: Fix MATCH_MIDDLE_ONLY filter matching

The @str might not be NULL-terminated if it's of type
DYN_STRING or STATIC_STRING, so we should use strnstr()
instead of strstr().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4B4E8753.2000102@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---

diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 49e44dd17851..f364b085397e 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -268,7 +268,7 @@ static int regex_match_front(char *str, struct regex *r, int len)
 
 static int regex_match_middle(char *str, struct regex *r, int len)
 {
-	if (strstr(str, r->pattern))
+	if (strnstr(str, r->pattern, len))
 		return 1;
 	return 0;
 }