[PATCH] orinoco: possible null pointer dereference in orinoco_rx_monitor()

If the skb allocation fails, the current error path calls
dev_kfree_skb_irq() with a NULL argument.  Also, 'err' is not being used.

Coverity CID: 275.

Signed-off-by: Florin Malita <fmalita@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 06523e2..c2d0b09 100644 (file)
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -812,7 +812,6 @@ static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
        if (datalen > IEEE80211_DATA_LEN + 12) {
                printk(KERN_DEBUG "%s: oversized monitor frame, "
                       "data length = %d\n", dev->name, datalen);
-               err = -EIO;
                stats->rx_length_errors++;
                goto update_stats;
        }
@@ -821,8 +820,7 @@ static void orinoco_rx_monitor(struct net_device *dev, u16 rxfid,
        if (!skb) {
                printk(KERN_WARNING "%s: Cannot allocate skb for monitor frame\n",
                       dev->name);
-               err = -ENOMEM;
-               goto drop;
+               goto update_stats;
        }
 
        /* Copy the 802.11 header to the skb */