From: Hideo AOKI <haoki@redhat.com>
To: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Cc: Hideo AOKI <haoki@redhat.com>,
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] fix send buffer check
Date: Tue, 13 Nov 2007 21:47:49 -0500 [thread overview]
Message-ID: <473A61D5.8020203@redhat.com> (raw)
In-Reply-To: <473A5FD6.5010209@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 2007-11-13 08:19:57.000000000 -0500
+++ net-2.6-udp-p1/net/ipv4/ip_output.c 2007-11-13 16:10:03.000000000 -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);
--
Hideo Aoki
Hitachi Computer Products (America) Inc.
next prev parent reply other threads:[~2007-11-14 2:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-14 2:39 [PATCH 0/5] UDP memory accounting and limitation (take 7) Hideo AOKI
2007-11-14 2:47 ` Hideo AOKI [this message]
2007-11-14 2:48 ` [PATCH 2/5] accounting unit and variable Hideo AOKI
2007-11-14 2:48 ` [PATCH 3/5] memory accounting Hideo AOKI
2007-11-14 2:48 ` [PATCH 4/5] memory limitation by using udp_mem Hideo AOKI
2007-11-14 2:49 ` [PATCH 5/5] add udp_rmem_min and udp_wmem_min Hideo AOKI
2007-11-14 4:32 ` [PATCH 0/5] UDP memory accounting and limitation (take 7) David Miller
-- strict thread matches above, loose matches on Subject: below --
2007-10-29 21:18 [PATCH 0/5] UDP memory accounting and limitation (take 6) Hideo AOKI
2007-10-29 21:22 ` [PATCH 1/5] fix send buffer check Hideo AOKI
2007-11-09 12:24 ` Herbert Xu
2007-11-14 3:25 ` Hideo AOKI
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