linux-kernel - [PATCH 1/4][Trivial] lib/kobject.c: Check parameter in kobject_get

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Message-ID: <1335000350.2188.5.camel@yan>
Date:	Sat, 21 Apr 2012 17:25:42 +0800
From:	yan <clouds.yan@...il.com>
To:	greg <gregkh@...uxfoundation.org>
Cc:	kernel <linux-kernel@...r.kernel.org>,
	message <message.get@...il.com>
Subject: [PATCH 1/4][Trivial] lib/kobject.c: Check parameter in
 kobject_get_path

kobject_get_path is exported, it passes its parameter kobj to
get_kobj_path_length and fill_kobj_path which are both static 
and called only once here. So check this parameter.


Signed-off-by: Yan Hong <clouds.yan@...il.com>
---
 lib/kobject.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 38fcc60..56c8cb3 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -104,6 +104,9 @@ char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
 	char *path;
 	int len;
 
+	if (!kobj)
+		return NULL;
+
 	len = get_kobj_path_length(kobj);
 	if (len == 0)
 		return NULL;
-- 
1.7.5.1



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