linux-kernel - [PATCH] Fix a memory leak in em28xx_usb

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Message-Id: <200708092302.36705.jesper.juhl@gmail.com>
Date:	Thu, 9 Aug 2007 23:02:36 +0200
From:	Jesper Juhl <jesper.juhl@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Luca Risolia <luca.risolia@...dio.unibo.it>,
	Ludovico Cavedon <cavedon@...up.it>,
	Markus Rechberger <mrechberger@...il.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Sascha Sommer <saschasommer@...enet.de>,
	Jesper Juhl <jesper.juhl@...il.com>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: [PATCH] Fix a memory leak in em28xx_usb_probe()

EHLO,

If, in em28xx_usb_probe() the memory allocation
	dev->alt_max_pkt_size = kmalloc(32*
						dev->num_alt,GFP_KERNEL);
fails, then we'll bail out and return -ENOMEM.
The problem is that in that case we don't free the storage allocated 
to 'dev', thus causing a memory leak.

This patch fixes the leak by freeing 'dev' before we return -ENOMEM.
This fixes Coverity bug #647.


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

 drivers/media/video/em28xx/em28xx-video.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 2c7b158..40307f3 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -1772,6 +1772,7 @@ static int em28xx_usb_probe(struct usb_interface *interface,
 	if (dev->alt_max_pkt_size == NULL) {
 		em28xx_errdev("out of memory!\n");
 		em28xx_devused&=~(1<<nr);
+		kfree(dev);
 		return -ENOMEM;
 	}
 



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