staging: wilc1000: add check for kmalloc allocation failure.

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>

diff --git a/drivers/staging/wilc1000/host_interface.c b/drivers/staging/wilc1000/host_interface.c
index c2a3424c35cb2ee0c66bceae1932ec343f9774f8..f848bb85ff1fa8206f21a46b675fc7af3ac2c103 100644 (file)
--- 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);