netdev - [PATCH] Fix possible null pointer dereference in ehea

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Date:	Mon, 14 Mar 2011 13:16:04 +0530
From:	huzaifas@...hat.com
To:	netdev@...r.kernel.org
Cc:	leitao@...ux.vnet.ibm.com,
	Huzaifa Sidhpurwala <huzaifas@...hat.com>
Subject: [PATCH] Fix possible null pointer dereference in ehea_qmr.c

From: Huzaifa Sidhpurwala <huzaifas@...hat.com>

If queue is zero, dont reference it

Signed-off-by: Huzaifa Sidhpurwala <huzaifas@...hat.com>
---
 drivers/net/ehea/ehea_qmr.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ehea/ehea_qmr.c b/drivers/net/ehea/ehea_qmr.c
index cd44bb8..fd0815d 100644
--- a/drivers/net/ehea/ehea_qmr.c
+++ b/drivers/net/ehea/ehea_qmr.c
@@ -106,12 +106,13 @@ 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)
--
1.7.3.4
--
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