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| author | Patrick McHardy <kaber@trash.net> | 2005-06-19 09:45:31 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-06-19 09:45:31 +0400 |
| commit | 7d6dfe1f5bc4c56e0c31173014a099ec3fa35907 (patch) | |
| tree | a6b04337c4f6d1ff7b050082dc7e69dc5617d3d0 | |
| parent | f60f6b8f70c756fc786d68f02ec17a1e84db645f (diff) | |
| download | linux-7d6dfe1f5bc4c56e0c31173014a099ec3fa35907.tar.xz | |
[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>
| -rw-r--r-- | net/key/af_key.c | 4 | ||||
| -rw-r--r-- | net/xfrm/xfrm_user.c | 4 |
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; } |