linux-kernel - [patch] trace: strlen() return doesn't account for the NULL

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Message-ID: <20100710100644.GV19184@bicker>
Date:	Sat, 10 Jul 2010 12:06:44 +0200
From:	Dan Carpenter <error27@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Li Zefan <lizf@...fujitsu.com>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [patch] trace: strlen() return doesn't account for the NULL

We need to add one to the strlen() return because of the NULL
character.  The type->name here generally comes from the kernel and I
don't think any of them come close to being MAX_TRACER_SIZE (100)
characters long so this is basically a cleanup.

Signed-off-by: Dan Carpenter <error27@...il.com>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 086d363..5f13c35 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -729,7 +729,7 @@ __acquires(kernel_lock)
 		return -1;
 	}
 
-	if (strlen(type->name) > MAX_TRACER_SIZE) {
+	if (strlen(type->name) >= MAX_TRACER_SIZE) {
 		pr_info("Tracer has a name longer than %d\n", MAX_TRACER_SIZE);
 		return -1;
 	}
--
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