[PATCH 1/4] [UDP]: fix send buffer check
From: Hideo AOKI <hidden>
Date: 2007-12-18 02:42:20
This patch introduces sndbuf size check before memory allocation for send buffer. signed-off-by: Satoshi Oshima <redacted> signed-off-by: Hideo Aoki <redacted> --- ip_output.c | 5 +++++ 1 file changed, 5 insertions(+) diff -pruN net-2.6/net/ipv4/ip_output.c net-2.6-udp-take11a1-p1/net/ipv4/ip_output.c
--- net-2.6/net/ipv4/ip_output.c 2007-12-11 10:54:55.000000000 -0500
+++ net-2.6-udp-take11a1-p1/net/ipv4/ip_output.c 2007-12-17 14:42:31.000000000 -0500@@ -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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