Pointer is dereferenced before the null check. Pointer variable is set
(using a cast) to point to a function argument, the pointer is then
dereferenced before it is checked for non-null.
Move null check to before the dereference.
Signed-off-by: Tobin C. Harding <me@xxxxxxxx>
---
drivers/staging/ks7010/ks_wlan_net.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/ks7010/ks_wlan_net.c b/drivers/staging/ks7010/ks_wlan_net.c
index dc89c16..b467307 100644
--- a/drivers/staging/ks7010/ks_wlan_net.c
+++ b/drivers/staging/ks7010/ks_wlan_net.c
@@ -1771,6 +1771,8 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
unsigned int commit = 0;
enc = (struct iw_encode_ext *)extra;
+ if (!enc)
+ return -EINVAL;
DPRINTK(2, "flags=%04X:: ext_flags=%08X\n", dwrq->flags,
enc->ext_flags);
@@ -1786,9 +1788,6 @@ static int ks_wlan_set_encode_ext(struct net_device *dev,
if (dwrq->flags & IW_ENCODE_DISABLED)
priv->wpa.key[index].key_len = 0;
- if (!enc)
- return -EINVAL;
-
priv->wpa.key[index].ext_flags = enc->ext_flags;
if (enc->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
priv->wpa.txkey = index;
--
2.7.4
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