netdev - [PATCH] drivers: net: wireless: b43: Fix possible NULL ptr dereference

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Date:	Wed, 16 Oct 2013 21:40:24 -0300
From:	Felipe Pena <felipensp@...il.com>
To:	Stefano Brivio <stefano.brivio@...imi.it>,
	"John W. Linville" <linville@...driver.com>
Cc:	linux-wireless@...r.kernel.org, b43-dev@...ts.infradead.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Felipe Pena <felipensp@...il.com>
Subject: [PATCH] drivers: net: wireless: b43: Fix possible NULL ptr dereference

On the ternary expression the 'e' variable could be NULL dereferenced,
when b43_nphy_get_rf_ctl_over_rev7 function returns NULL.

Signed-off-by: Felipe Pena <felipensp@...il.com>
---
 drivers/net/wireless/b43/phy_n.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 7c970d3..05ee7f1 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -164,7 +164,8 @@ static void b43_nphy_rf_ctl_override_rev7(struct b43_wldev *dev, u16 field,
 		}
 		en_addr = en_addrs[override][i];

-		val_addr = (i == 0) ? e->val_addr_core0 : e->val_addr_core1;
+		if (e)
+			val_addr = (i == 0) ? e->val_addr_core0 : e->val_addr_core1;

 		if (off) {
 			b43_phy_mask(dev, en_addr, ~en_mask);
--
1.7.10.4

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