linux-kernel - [PATCH] staging: wilc1000: add check for kmalloc allocation failure.

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Date:   Tue, 28 Feb 2017 11:47:33 +0000
From:   Colin King <colin.king@...onical.com>
To:     Aditya Shankar <aditya.shankar@...rochip.com>,
        Ganesh Krishna <ganesh.krishna@...rochip.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: wilc1000: add check for kmalloc allocation failure.

From: Colin Ian King <colin.king@...onical.com>

Add a sanity check that wid.val has been allocated, fixes a null
pointer deference on stamac when calling ether_add_copy.

Detected by CoverityScan, CID#1369537 ("Dereference null return value")

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/staging/wilc1000/host_interface.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index c307cce..e83fa21 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -1928,6 +1928,8 @@ static s32 Handle_Get_InActiveTime(struct wilc_vif *vif,
 	wid.type = WID_STR;
 	wid.size = ETH_ALEN;
 	wid.val = kmalloc(wid.size, GFP_KERNEL);
+	if (!wid.val)
+		return -ENOMEM;
 
 	stamac = wid.val;
 	ether_addr_copy(stamac, strHostIfStaInactiveT->mac);
-- 
2.10.2