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-rw-r--r--net/xfrm/xfrm_output.c6
-rw-r--r--net/xfrm/xfrm_policy.c48
2 files changed, 41 insertions, 13 deletions
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index c51e8f7b8653..499d6c18a8ce 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -166,11 +166,7 @@ static int xfrm_output_gso(struct sk_buff *skb)
err = xfrm_output2(segs);
if (unlikely(err)) {
- while ((segs = nskb)) {
- nskb = segs->next;
- segs->next = NULL;
- kfree_skb(segs);
- }
+ kfree_skb_list(nskb);
return err;
}
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 55bcb8604bc6..f623dca6ce30 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -39,6 +39,11 @@
#define XFRM_QUEUE_TMO_MAX ((unsigned)(60*HZ))
#define XFRM_MAX_QUEUE_LEN 100
+struct xfrm_flo {
+ struct dst_entry *dst_orig;
+ u8 flags;
+};
+
static DEFINE_SPINLOCK(xfrm_policy_afinfo_lock);
static struct xfrm_policy_afinfo __rcu *xfrm_policy_afinfo[NPROTO]
__read_mostly;
@@ -1994,13 +1999,14 @@ static int xdst_queue_output(struct sock *sk, struct sk_buff *skb)
}
static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net,
- struct dst_entry *dst,
+ struct xfrm_flo *xflo,
const struct flowi *fl,
int num_xfrms,
u16 family)
{
int err;
struct net_device *dev;
+ struct dst_entry *dst;
struct dst_entry *dst1;
struct xfrm_dst *xdst;
@@ -2008,9 +2014,12 @@ static struct xfrm_dst *xfrm_create_dummy_bundle(struct net *net,
if (IS_ERR(xdst))
return xdst;
- if (net->xfrm.sysctl_larval_drop || num_xfrms <= 0)
+ if (!(xflo->flags & XFRM_LOOKUP_QUEUE) ||
+ net->xfrm.sysctl_larval_drop ||
+ num_xfrms <= 0)
return xdst;
+ dst = xflo->dst_orig;
dst1 = &xdst->u.dst;
dst_hold(dst);
xdst->route = dst;
@@ -2052,7 +2061,7 @@ static struct flow_cache_object *
xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
struct flow_cache_object *oldflo, void *ctx)
{
- struct dst_entry *dst_orig = (struct dst_entry *)ctx;
+ struct xfrm_flo *xflo = (struct xfrm_flo *)ctx;
struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
struct xfrm_dst *xdst, *new_xdst;
int num_pols = 0, num_xfrms = 0, i, err, pol_dead;
@@ -2093,7 +2102,8 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
goto make_dummy_bundle;
}
- new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family, dst_orig);
+ new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family,
+ xflo->dst_orig);
if (IS_ERR(new_xdst)) {
err = PTR_ERR(new_xdst);
if (err != -EAGAIN)
@@ -2127,7 +2137,7 @@ make_dummy_bundle:
/* We found policies, but there's no bundles to instantiate:
* either because the policy blocks, has no transformations or
* we could not build template (no xfrm_states).*/
- xdst = xfrm_create_dummy_bundle(net, dst_orig, fl, num_xfrms, family);
+ xdst = xfrm_create_dummy_bundle(net, xflo, fl, num_xfrms, family);
if (IS_ERR(xdst)) {
xfrm_pols_put(pols, num_pols);
return ERR_CAST(xdst);
@@ -2221,13 +2231,18 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
}
if (xdst == NULL) {
+ struct xfrm_flo xflo;
+
+ xflo.dst_orig = dst_orig;
+ xflo.flags = flags;
+
/* To accelerate a bit... */
if ((dst_orig->flags & DST_NOXFRM) ||
!net->xfrm.policy_count[XFRM_POLICY_OUT])
goto nopol;
flo = flow_cache_lookup(net, fl, family, dir,
- xfrm_bundle_lookup, dst_orig);
+ xfrm_bundle_lookup, &xflo);
if (flo == NULL)
goto nopol;
if (IS_ERR(flo)) {
@@ -2255,7 +2270,7 @@ struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
xfrm_pols_put(pols, drop_pols);
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES);
- return make_blackhole(net, family, dst_orig);
+ return ERR_PTR(-EREMOTE);
}
err = -EAGAIN;
@@ -2312,6 +2327,23 @@ dropdst:
}
EXPORT_SYMBOL(xfrm_lookup);
+/* Callers of xfrm_lookup_route() must ensure a call to dst_output().
+ * Otherwise we may send out blackholed packets.
+ */
+struct dst_entry *xfrm_lookup_route(struct net *net, struct dst_entry *dst_orig,
+ const struct flowi *fl,
+ struct sock *sk, int flags)
+{
+ struct dst_entry *dst = xfrm_lookup(net, dst_orig, fl, sk,
+ flags | XFRM_LOOKUP_QUEUE);
+
+ if (IS_ERR(dst) && PTR_ERR(dst) == -EREMOTE)
+ return make_blackhole(net, dst_orig->ops->family, dst_orig);
+
+ return dst;
+}
+EXPORT_SYMBOL(xfrm_lookup_route);
+
static inline int
xfrm_secpath_reject(int idx, struct sk_buff *skb, const struct flowi *fl)
{
@@ -2577,7 +2609,7 @@ int __xfrm_route_forward(struct sk_buff *skb, unsigned short family)
skb_dst_force(skb);
- dst = xfrm_lookup(net, skb_dst(skb), &fl, NULL, 0);
+ dst = xfrm_lookup(net, skb_dst(skb), &fl, NULL, XFRM_LOOKUP_QUEUE);
if (IS_ERR(dst)) {
res = 0;
dst = NULL;