linux-kernel - [PATCH] Staging: rtl8712: fix potential null pointer dereference

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Date:	Wed, 11 Mar 2015 14:31:14 +0100
From:	Matteo Semenzato <mattew8898@...il.com>
To:	gregkh@...uxfoundation.org, Larry.Finger@...inger.net,
	florian.c.schilhabel@...glemail.com, shack@...ux.com,
	vitaly.osipov@...il.com, peter.senna@...il.com,
	vthakkar1994@...il.com, cengelma@....at,
	sudipm.mukherjee@...il.com, tapaswenipathak@...il.com
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Matteo Semenzato <mattew8898@...il.com>
Subject: [PATCH] Staging: rtl8712: fix potential null pointer dereference

From: Matteo Semenzato <mattew8898@...il.com>

Check if kmalloc succeded before using the pointer in memcpy.

Signed-off-by: Matteo Semenzato <mattew8898@...il.com>
---
 drivers/staging/rtl8712/rtl871x_mlme.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/rtl8712/rtl871x_mlme.c b/drivers/staging/rtl8712/rtl871x_mlme.c
index 977a833..c6e9012 100644
--- a/drivers/staging/rtl8712/rtl871x_mlme.c
+++ b/drivers/staging/rtl8712/rtl871x_mlme.c
@@ -727,6 +727,8 @@ void r8712_joinbss_event_callback(struct _adapter *adapter, u8 *pbuf)
 
 	if (sizeof(struct list_head) == 4 * sizeof(u32)) {
 		pnetwork = kmalloc(sizeof(struct wlan_network), GFP_ATOMIC);
+		if (!pnetwork)
+			return;
 		memcpy((u8 *)pnetwork+16, (u8 *)pbuf + 8,
 			sizeof(struct wlan_network) - 16);
 	} else
-- 
2.3.2

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