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packet: Add needed_tailroom to packet_sendmsg_spkt

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packet: Add needed_tailroom to packet_sendmsg_spkt

While auditing LL_ALLOCATED_SPACE I noticed that packet_sendmsg_spkt
did not include needed_tailroom when allocating an skb.  This isn't
a fatal error as we should always tolerate inadequate tail room but
it isn't optimal.

This patch fixes that.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2011-11-18 02:20:05 +00:00 committed by David S. Miller
parent 56c978f1da
commit 4ce4091256
1 changed files with 2 additions and 1 deletions
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3
net/packet/af_packet.c
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@ -1499,10 +1499,11 @@ static int packet_sendmsg_spkt(struct kiocb *iocb, struct socket *sock,
if (!skb) { if (!skb) {
size_t reserved = LL_RESERVED_SPACE(dev); size_t reserved = LL_RESERVED_SPACE(dev);
int tlen = dev->needed_tailroom;
unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0; unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0;
rcu_read_unlock(); rcu_read_unlock();
skb = sock_wmalloc(sk, len + reserved, 0, GFP_KERNEL); skb = sock_wmalloc(sk, len + reserved + tlen, 0, GFP_KERNEL);
if (skb == NULL) if (skb == NULL)
return -ENOBUFS; return -ENOBUFS;
/* FIXME: Save some space for broken drivers that write a hard /* FIXME: Save some space for broken drivers that write a hard