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| author | Patrick McHardy <kaber@trash.net> | 2007-04-09 20:47:58 +0200 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 07:28:39 +0200 |
| commit | ac758e3c55c529714354fc268892ca4d23ca1e99 (patch) | |
| tree | 05d287a417c04114afa68c2a931f3c212e133e1c /net/ipv4/xfrm4_mode_beet.c | |
| parent | [XFRM]: Optimize MTU calculation (diff) | |
| download | linux-ac758e3c55c529714354fc268892ca4d23ca1e99.tar.xz linux-ac758e3c55c529714354fc268892ca4d23ca1e99.zip | |
[XFRM]: beet: fix worst case header_len calculation
esp_init_state doesn't account for the beet pseudo header in the header_len
calculation, which may result in undersized skbs hitting xfrm4_beet_output,
causing unnecessary reallocations in ip_finish_output2.
The skbs should still always have enough room to avoid causing
skb_under_panic in skb_push since we have at least 16 bytes available
from LL_RESERVED_SPACE in xfrm_state_check_space.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/xfrm4_mode_beet.c')
| -rw-r--r-- | net/ipv4/xfrm4_mode_beet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/xfrm4_mode_beet.c b/net/ipv4/xfrm4_mode_beet.c index 0f7c3e30e4e6..a73e710740c2 100644 --- a/net/ipv4/xfrm4_mode_beet.c +++ b/net/ipv4/xfrm4_mode_beet.c @@ -40,7 +40,7 @@ static int xfrm4_beet_output(struct xfrm_state *x, struct sk_buff *skb) if (unlikely(optlen)) hdrlen += IPV4_BEET_PHMAXLEN - (optlen & 4); - skb_push(skb, x->props.header_len + hdrlen); + skb_push(skb, x->props.header_len - IPV4_BEET_PHMAXLEN + hdrlen); skb_reset_network_header(skb); top_iph = ip_hdr(skb); skb->transport_header += sizeof(*iph) - hdrlen; |