linux-kernel - [PATCH] Don't leak 'old_class_name' in drivers/base/core.c::device

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Message-Id: <200609282356.01962.jesper.juhl@gmail.com>
Date:	Thu, 28 Sep 2006 23:56:01 +0200
From:	Jesper Juhl <jesper.juhl@...il.com>
To:	Greg Kroah-Hartman <gregkh@...e.de>
Cc:	linux-kernel@...r.kernel.org, Patrick Mochel <mochel@...l.org>,
	Patrick Mochel <mochel@...inity.powertie.org>
Subject: [PATCH] Don't leak 'old_class_name' in drivers/base/core.c::device_rename()

If kmalloc() fails to allocate space for 'old_symlink_name' in
drivers/base/core.c::device_rename(), then we'll leak 'old_class_name'.

Spotted by the Coverity checker.


Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>
---

 drivers/base/core.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- linux-2.6.18-git10-orig/drivers/base/core.c	2006-09-28 22:39:53.000000000 +0200
+++ linux-2.6.18-git10/drivers/base/core.c	2006-09-28 23:48:51.000000000 +0200
@@ -805,8 +805,10 @@ int device_rename(struct device *dev, ch
 
 	if (dev->class) {
 		old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
-		if (!old_symlink_name)
-			return -ENOMEM;
+		if (!old_symlink_name) {
+			error = -ENOMEM;
+			goto out_free_old_class;
+		}
 		strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
 	}
 
@@ -830,9 +832,10 @@ int device_rename(struct device *dev, ch
 	}
 	put_device(dev);
 
-	kfree(old_class_name);
 	kfree(new_class_name);
 	kfree(old_symlink_name);
+ out_free_old_class:
+	kfree(old_class_name);
 
 	return error;
 }

-
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