[PATCH 4.4 004/134] staging: wilc1000: add check for kmalloc allocation failure.

From: Greg Kroah-Hartman
Date: Mon Mar 19 2018 - 14:13:34 EST


4.4-stable review patch. If anyone has any objections, please let me know.

------------------

From: Colin Ian King <colin.king@xxxxxxxxxxxxx>


[ Upstream commit 6cc0c259d034c6ab48f4e12f505213988e73d380 ]

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@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/wilc1000/host_interface.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -2179,6 +2179,8 @@ static s32 Handle_Get_InActiveTime(struc
wid.type = WID_STR;
wid.size = ETH_ALEN;
wid.val = kmalloc(wid.size, GFP_KERNEL);
+ if (!wid.val)
+ return -ENOMEM;

stamac = wid.val;
memcpy(stamac, strHostIfStaInactiveT->mac, ETH_ALEN);