linux-kernel - [PATCH] Fix possible kobject reference counter leak in kobject

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Date:	Thu, 21 Aug 2008 19:31:48 +0900
From:	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To:	Greg KH <gregkh@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] Fix possible kobject reference counter leak in kobject_rename()

Hi,

I found a possible kobject reference counter leak problem in
kobject_rename(). The following patch will fix it.

Thanks,
Kenji Kaneshige


Fix possible kobject reference counter leak in kobject_rename().

If kobject_rename() failed because of name collision, we must call
kobject_put() for specified kobject before return.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>

---
 lib/kobject.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.27-rc4/lib/kobject.c
===================================================================
--- linux-2.6.27-rc4.orig/lib/kobject.c
+++ linux-2.6.27-rc4/lib/kobject.c
@@ -411,6 +411,7 @@ int kobject_rename(struct kobject *kobj,
 			       "to '%s' as '%s' is already in existence.\n",
 			       kobject_name(kobj), new_name, new_name);
 			kobject_put(temp_kobj);
+			kobject_put(kobj);
 			return -EINVAL;
 		}
 	}

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