From 7d6dfe1f5bc4c56e0c31173014a099ec3fa35907 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Sat, 18 Jun 2005 22:45:31 -0700 Subject: [PATCH] [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 Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/key/af_key.c | 4 ++-- 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; } -- 2.20.1