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authorPatrick McHardy <kaber@trash.net>2005-06-18 22:45:31 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-18 22:45:31 -0700
commit7d6dfe1f5bc4c56e0c31173014a099ec3fa35907 (patch)
treea6b04337c4f6d1ff7b050082dc7e69dc5617d3d0 /net
parentf60f6b8f70c756fc786d68f02ec17a1e84db645f (diff)
downloadlinux-7d6dfe1f5bc4c56e0c31173014a099ec3fa35907.tar.bz2
[IPSEC] Fix xfrm_state leaks in error path
Herbert Xu wrote: > @@ -1254,6 +1326,7 @@ static int pfkey_add(struct sock *sk, st > if (IS_ERR(x)) > return PTR_ERR(x); > > + xfrm_state_hold(x); This introduces a leak when xfrm_state_add()/xfrm_state_update() fail. We hold two references (one from xfrm_state_alloc(), one from xfrm_state_hold()), but only drop one. We need to take the reference because the reference from xfrm_state_alloc() can be dropped by __xfrm_state_delete(), so the fix is to drop both references on error. Same problem in xfrm_user.c. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/key/af_key.c4
-rw-r--r--net/xfrm/xfrm_user.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c
index 577f0bb5bb31..98b72f2024ff 100644
--- a/net/key/af_key.c
+++ b/net/key/af_key.c
@@ -1333,7 +1333,7 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
if (err < 0) {
x->km.state = XFRM_STATE_DEAD;
xfrm_state_put(x);
- return err;
+ goto out;
}
if (hdr->sadb_msg_type == SADB_ADD)
@@ -1343,8 +1343,8 @@ static int pfkey_add(struct sock *sk, struct sk_buff *skb, struct sadb_msg *hdr,
c.seq = hdr->sadb_msg_seq;
c.pid = hdr->sadb_msg_pid;
km_state_notify(x, &c);
+out:
xfrm_state_put(x);
-
return err;
}
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index bc4fd7456873..9d30f732a273 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -296,7 +296,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
if (err < 0) {
x->km.state = XFRM_STATE_DEAD;
xfrm_state_put(x);
- return err;
+ goto out;
}
c.seq = nlh->nlmsg_seq;
@@ -304,8 +304,8 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, void **xfrma)
c.event = nlh->nlmsg_type;
km_state_notify(x, &c);
+out:
xfrm_state_put(x);
-
return err;
}