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authorSteffen Klassert <steffen.klassert@secunet.com>2011-05-09 23:36:38 +0400
committerDavid S. Miller <davem@davemloft.net>2011-05-11 02:03:34 +0400
commit43a4dea4c9d44baae38ddc14b9b6d86fde4c8b88 (patch)
treeaf7ecb23077cf5b4ae1290f7d1ab5e901e7adb82 /include/net/xfrm.h
parente14a599335427f81bbb0008963e59aa9c6449dce (diff)
downloadlinux-43a4dea4c9d44baae38ddc14b9b6d86fde4c8b88.tar.xz
xfrm: Assign the inner mode output function to the dst entry
As it is, we assign the outer modes output function to the dst entry when we create the xfrm bundle. This leads to two problems on interfamily scenarios. We might insert ipv4 packets into ip6_fragment when called from xfrm6_output. The system crashes if we try to fragment an ipv4 packet with ip6_fragment. This issue was introduced with git commit ad0081e4 (ipv6: Fragment locally generated tunnel-mode IPSec6 packets as needed). The second issue is, that we might insert ipv4 packets in netfilter6 and vice versa on interfamily scenarios. With this patch we assign the inner mode output function to the dst entry when we create the xfrm bundle. So xfrm4_output/xfrm6_output from the inner mode is used and the right fragmentation and netfilter functions are called. We switch then to outer mode with the output_finish functions. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 6ae4bc5ce8a7..20afeaa39395 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -324,6 +324,7 @@ struct xfrm_state_afinfo {
int (*tmpl_sort)(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n);
int (*state_sort)(struct xfrm_state **dst, struct xfrm_state **src, int n);
int (*output)(struct sk_buff *skb);
+ int (*output_finish)(struct sk_buff *skb);
int (*extract_input)(struct xfrm_state *x,
struct sk_buff *skb);
int (*extract_output)(struct xfrm_state *x,
@@ -1454,6 +1455,7 @@ static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
extern int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm4_output(struct sk_buff *skb);
+extern int xfrm4_output_finish(struct sk_buff *skb);
extern int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
extern int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
extern int xfrm6_extract_header(struct sk_buff *skb);
@@ -1470,6 +1472,7 @@ extern __be32 xfrm6_tunnel_spi_lookup(struct net *net, xfrm_address_t *saddr);
extern int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm6_prepare_output(struct xfrm_state *x, struct sk_buff *skb);
extern int xfrm6_output(struct sk_buff *skb);
+extern int xfrm6_output_finish(struct sk_buff *skb);
extern int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
u8 **prevhdr);