This patch introduces sndbuf size check before
memory allcation for send buffer.
signed-off-by: Satoshi Oshima <[EMAIL PROTECTED]>
signed-off-by: Hideo Aoki <[EMAIL PROTECTED]>
Index: 2.6.23-rc7-udp_limit/net/ipv4/ip_output.c
===================================================================
--- 2.6.23-rc7-udp_limit.orig/net/ipv4/ip_output.c
+++ 2.6.23-rc7-udp_limit/net/ipv4/ip_output.c
@@ -1004,6 +1004,11 @@ alloc_new_skb:
frag = &skb_shinfo(skb)->frags[i];
}
} else if (i < MAX_SKB_FRAGS) {
+ if (atomic_read(&sk->sk_wmem_alloc) + PAGE_SIZE
+ > 2 * sk->sk_sndbuf) {
+ err = -ENOBUFS;
+ goto error;
+ }
if (copy > PAGE_SIZE)
copy = PAGE_SIZE;
page = alloc_pages(sk->sk_allocation, 0);
-
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