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[NETLINK]: Defer socket destruction a bit

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In netlink_broadcast() we're sending shared skb's to netlink listeners
when possible (saves some copying). This is OK, since we hold the only
other reference to the skb.

However, this implies that we must drop our reference on the skb, before
allowing a receiving socket to disappear. Otherwise, the socket buffer
accounting is disrupted.

Signed-off-by: Tommy S. Christensen <[email protected]>
Acked-by: Herbert Xu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Tommy S. Christensen 2005-05-19 13:07:32 -07:00 • committed by David S. Miller
commit aa1c6a6f7f
1 changed files with 2 additions and 1 deletions
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3
net/netlink/af_netlink.c
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@ -789,11 +789,12 @@ int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, u32 pid,
sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
do_one_broadcast(sk, &info);
kfree_skb(skb);
netlink_unlock_table();
if (info.skb2)
kfree_skb(info.skb2);
kfree_skb(skb);
if (info.delivered) {
if (info.congested && (allocation & __GFP_WAIT))