netdev - [PATCH] ehea: Fix possible NULL pointer dereference

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Message-Id: <1361746798-29215-1-git-send-email-s.syam@samsung.com>
Date:	Mon, 25 Feb 2013 04:29:58 +0530
From:	Syam Sidhardhan <syamsidhardh@...il.com>
To:	netdev@...r.kernel.org
Cc:	syamsidhardh@...il.com, cascardo@...ux.vnet.ibm.com
Subject: [PATCH] ehea: Fix possible NULL pointer dereference

Check for (queue == NULL) has to be done before accessing queue.

Signed-off-by: Syam Sidhardhan <s.syam@...sung.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_qmr.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_qmr.c b/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
index 9b03033..a0820f7 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
@@ -103,12 +103,14 @@ out_nomem:
 
 static void hw_queue_dtor(struct hw_queue *queue)
 {
-	int pages_per_kpage = PAGE_SIZE / queue->pagesize;
+	int pages_per_kpage;
 	int i, nr_pages;
 
 	if (!queue || !queue->queue_pages)
 		return;
 
+	pages_per_kpage = PAGE_SIZE / queue->pagesize;
+
 	nr_pages = queue->queue_length / queue->pagesize;
 
 	for (i = 0; i < nr_pages; i += pages_per_kpage)
-- 
1.7.9.5

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