[PATCH AUTOSEL for 4.9 007/219] staging: wilc1000: add check for kmalloc allocation failure.

Sasha Levin
2018-03-03T22:27:59Z

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

[ 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@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.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 6ab7443eabde..6326375b76ab 100644
--- a/drivers/staging/wilc1000/host_interface.c
+++ b/drivers/staging/wilc1000/host_interface.c
@@ -1930,6 +1930,8 @@ 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;
memcpy(stamac, strHostIfStaInactiveT->mac, ETH_ALEN);
--
2.14.1