linux-kernel - [PATCH] V4L/DVB: potential leak in dvb-bt8xx

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Date:	Sat, 14 Oct 2006 13:39:56 -0400
From:	Florin Malita <fmalita@...il.com>
To:	mchehab@...radead.org, v4l-dvb-maintainer@...uxtv.org
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH] V4L/DVB: potential leak in dvb-bt8xx

If dvb_attach
<http://www.coverity.com:7448/display-error.cgi?user=fmalita&magic=8997c91336813f372812011c89e0e75e&source=2693a21be69533084392e43c4f3c5220&runid=86&table=file&line=107>(dst_attach,
...) fails in *frontend_init*(), the previously allocated 'state' is
leaked (Coverity ID 1437).

Also, when allocating 'state' the result of kmalloc() needs to be checked.

Signed-off-by: Florin Malita <fmalita@...il.com>
---

 drivers/media/dvb/bt8xx/dvb-bt8xx.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/dvb/bt8xx/dvb-bt8xx.c b/drivers/media/dvb/bt8xx/dvb-bt8xx.c
index fb6c4cc..d22ba4e 100644
--- a/drivers/media/dvb/bt8xx/dvb-bt8xx.c
+++ b/drivers/media/dvb/bt8xx/dvb-bt8xx.c
@@ -665,6 +665,9 @@ static void frontend_init(struct dvb_bt8
 	case BTTV_BOARD_TWINHAN_DST:
 		/*	DST is not a frontend driver !!!		*/
 		state = (struct dst_state *) kmalloc(sizeof (struct dst_state), GFP_KERNEL);
+		if (!state)
+			break;
+
 		/*	Setup the Card					*/
 		state->config = &dst_config;
 		state->i2c = card->i2c_adapter;
@@ -673,6 +676,7 @@ static void frontend_init(struct dvb_bt8
 		/*	DST is not a frontend, attaching the ASIC	*/
 		if (dvb_attach(dst_attach, state, &card->dvb_adapter) == NULL) {
 			printk("%s: Could not find a Twinhan DST.\n", __FUNCTION__);
+			kfree(state);
 			break;
 		}
 		/*	Attach other DST peripherals if any		*/


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