From: Hideo AOKI <haoki@redhat.com>
To: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Cc: Satoshi Oshima <satoshi.oshima.fk@hitachi.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Bill Fink <billfink@mindspring.com>,
Andi Kleen <andi@firstfloor.org>,
Evgeniy Polyakov <johnpol@2ka.mipt.ru>,
Stephen Hemminger <shemminger@linux-foundation.org>,
yoshfuji@linux-ipv6.org,
Yumiko Sugita <yumiko.sugita.yf@hitachi.com>
Subject: [PATCH 1/5] udp: fix send buffer check
Date: Thu, 15 Nov 2007 16:49:39 -0500 [thread overview]
Message-ID: <473CBEF3.90501@redhat.com> (raw)
In-Reply-To: <473CBDAD.1010708@redhat.com>
This patch introduces sndbuf size check before memory allocation for
send buffer.
signed-off-by: Satoshi Oshima <satoshi.oshima.fk@hitachi.com>
signed-off-by: Hideo Aoki <haoki@redhat.com>
---
ip_output.c | 5 +++++
1 file changed, 5 insertions(+)
diff -pruN net-2.6/net/ipv4/ip_output.c net-2.6-udp-p1/net/ipv4/ip_output.c
--- net-2.6/net/ipv4/ip_output.c 2007-11-14 10:49:06.000000000 -0500
+++ net-2.6-udp-p1/net/ipv4/ip_output.c 2007-11-15 14:44:11.000000000 -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);
--
Hitachi Computer Products (America) Inc.
next prev parent reply other threads:[~2007-11-15 21:56 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-15 21:44 [PATCH 0/5] UDP memory accounting and limitation (take 8) Hideo AOKI
2007-11-15 21:49 ` Hideo AOKI [this message]
2007-11-15 21:49 ` [PATCH 2/5] udp: accounting unit and variable Hideo AOKI
2007-11-15 21:50 ` [PATCH 3/5] udp: memory accounting Hideo AOKI
2007-11-15 21:50 ` [PATCH 4/5] udp: memory limitation by using udp_mem Hideo AOKI
2007-11-15 23:23 ` David Miller
2007-11-16 2:12 ` Herbert Xu
2007-11-17 2:52 ` Hideo AOKI
2007-11-17 4:01 ` David Miller
2007-11-21 23:25 ` Hideo AOKI
2007-11-15 21:50 ` [PATCH 5/5] udp: add udp_rmem_min and udp_wmem_min Hideo AOKI
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