From d54a81d341af80875c201890500f727c8188dd9b Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sat, 2 Dec 2006 21:00:06 -0800 Subject: [PATCH] [IPV6] NDISC: Calculate packet length correctly for allocation. MAX_HEADER does not include the ipv6 header length in it, so we need to add it in explicitly. With help from YOSHIFUJI Hideaki. Signed-off-by: David S. Miller --- net/ipv6/ndisc.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 73eb8c33e9f0..89d527ebd7f6 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -472,7 +472,9 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh, inc_opt = 0; } - skb = sock_alloc_send_skb(sk, MAX_HEADER + len + LL_RESERVED_SPACE(dev), + skb = sock_alloc_send_skb(sk, + (MAX_HEADER + sizeof(struct ipv6hdr) + + len + LL_RESERVED_SPACE(dev)), 1, &err); if (skb == NULL) { @@ -561,7 +563,9 @@ void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh, if (send_llinfo) len += ndisc_opt_addr_space(dev); - skb = sock_alloc_send_skb(sk, MAX_HEADER + len + LL_RESERVED_SPACE(dev), + skb = sock_alloc_send_skb(sk, + (MAX_HEADER + sizeof(struct ipv6hdr) + + len + LL_RESERVED_SPACE(dev)), 1, &err); if (skb == NULL) { ND_PRINTK0(KERN_ERR @@ -636,7 +640,9 @@ void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr, if (dev->addr_len) len += ndisc_opt_addr_space(dev); - skb = sock_alloc_send_skb(sk, MAX_HEADER + len + LL_RESERVED_SPACE(dev), + skb = sock_alloc_send_skb(sk, + (MAX_HEADER + sizeof(struct ipv6hdr) + + len + LL_RESERVED_SPACE(dev)), 1, &err); if (skb == NULL) { ND_PRINTK0(KERN_ERR @@ -1446,7 +1452,9 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, rd_len &= ~0x7; len += rd_len; - buff = sock_alloc_send_skb(sk, MAX_HEADER + len + LL_RESERVED_SPACE(dev), + buff = sock_alloc_send_skb(sk, + (MAX_HEADER + sizeof(struct ipv6hdr) + + len + LL_RESERVED_SPACE(dev)), 1, &err); if (buff == NULL) { ND_PRINTK0(KERN_ERR -- 2.20.1