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authorHerbert Xu <herbert@gondor.apana.org.au>2007-11-13 21:36:07 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:53:40 -0800
commitfff693888012806370c98c601fbaa141fb12dfca (patch)
treedfa42737bee5f14d1acfaabbc9320fdc45487dec
parent45ff5a3f9a3d0b1b4f063b5285ab39b7fac59471 (diff)
downloadlinux-fff693888012806370c98c601fbaa141fb12dfca.tar.bz2
[IPSEC]: Make sure idev is consistent with dev in xfrm_dst
Previously we took the device from the bottom route and idev from the top route. This is bad because idev may well point to a different device. This patch changes it so that we get the idev from the device directly. It also makes it an error if either dev or idev is NULL. This is consistent with the rest of the routing code which also treats these cases as errors. I've removed the err initialisation in xfrm6_policy.c because it achieves no purpose and hid a bug when an initial version of this patch neglected to set err to -ENODEV (fortunately the IPv4 version warned about it). Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/xfrm4_policy.c13
-rw-r--r--net/ipv6/xfrm6_policy.c15
2 files changed, 19 insertions, 9 deletions
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index c40a71b74dba..d903c8bdffcd 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -153,14 +153,21 @@ __xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst_prev = *dst_p;
i = 0;
+ err = -ENODEV;
for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
x->u.rt.fl = *fl;
dst_prev->xfrm = xfrm[i++];
dst_prev->dev = rt->u.dst.dev;
- if (rt->u.dst.dev)
- dev_hold(rt->u.dst.dev);
+ if (!rt->u.dst.dev)
+ goto error;
+ dev_hold(rt->u.dst.dev);
+
+ x->u.rt.idev = in_dev_get(rt->u.dst.dev);
+ if (!x->u.rt.idev)
+ goto error;
+
dst_prev->obsolete = -1;
dst_prev->flags |= DST_HOST;
dst_prev->lastuse = jiffies;
@@ -181,8 +188,6 @@ __xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
x->u.rt.rt_dst = rt0->rt_dst;
x->u.rt.rt_gateway = rt0->rt_gateway;
x->u.rt.rt_spec_dst = rt0->rt_spec_dst;
- x->u.rt.idev = rt0->idev;
- in_dev_hold(rt0->idev);
header_len -= x->u.dst.xfrm->props.header_len;
trailer_len -= x->u.dst.xfrm->props.trailer_len;
}
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 89432279d3a0..77dc3651437e 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -123,7 +123,7 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
}
};
int i;
- int err = 0;
+ int err;
int header_len = 0;
int trailer_len = 0;
@@ -201,13 +201,20 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst_prev = *dst_p;
i = 0;
+ err = -ENODEV;
for (; dst_prev != &rt->u.dst; dst_prev = dst_prev->child) {
struct xfrm_dst *x = (struct xfrm_dst*)dst_prev;
dst_prev->xfrm = xfrm[i++];
dst_prev->dev = rt->u.dst.dev;
- if (rt->u.dst.dev)
- dev_hold(rt->u.dst.dev);
+ if (!rt->u.dst.dev)
+ goto error;
+ dev_hold(rt->u.dst.dev);
+
+ x->u.rt6.rt6i_idev = in6_dev_get(rt->u.dst.dev);
+ if (!x->u.rt6.rt6i_idev)
+ goto error;
+
dst_prev->obsolete = -1;
dst_prev->flags |= DST_HOST;
dst_prev->lastuse = jiffies;
@@ -226,8 +233,6 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
memcpy(&x->u.rt6.rt6i_gateway, &rt0->rt6i_gateway, sizeof(x->u.rt6.rt6i_gateway));
x->u.rt6.rt6i_dst = rt0->rt6i_dst;
x->u.rt6.rt6i_src = rt0->rt6i_src;
- x->u.rt6.rt6i_idev = rt0->rt6i_idev;
- in6_dev_hold(rt0->rt6i_idev);
header_len -= x->u.dst.xfrm->props.header_len;
trailer_len -= x->u.dst.xfrm->props.trailer_len;
}