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mac80211: fix access to null skb

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Without this patch, if xmit_skb is null but net_ratelimit() returns 0 we would
go to the else branch and access the null xmit_skb. Pointed out by Johannes
Berg.

Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Luis Carlos Cobo 2008-05-05 12:29:42 -07:00 committed by John W. Linville
parent ef26925477
commit 69687a0b99
1 changed files with 3 additions and 3 deletions
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6
net/mac80211/rx.c
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@ -1305,11 +1305,11 @@ ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
if (is_multicast_ether_addr(skb->data)) {
if (*mesh_ttl > 0) {
xmit_skb = skb_copy(skb, GFP_ATOMIC);
if (!xmit_skb && net_ratelimit())
if (xmit_skb)
xmit_skb->pkt_type = PACKET_OTHERHOST;
else if (net_ratelimit())
printk(KERN_DEBUG "%s: failed to clone "
"multicast frame\n", dev->name);
else
xmit_skb->pkt_type = PACKET_OTHERHOST;
} else
IEEE80211_IFSTA_MESH_CTR_INC(&sdata->u.sta,
dropped_frames_ttl);