[3.16.y-ckt stable] Patch "netfilter: nf_tables: fix leaks in error path of nf_tables_newchain()" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    netfilter: nf_tables: fix leaks in error path of nf_tables_newchain()

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt9.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 0fe040344fe6799ac8a55d08041dd9df134a543e Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo at netfilter.org>
Date: Thu, 29 Jan 2015 19:08:09 +0100
Subject: netfilter: nf_tables: fix leaks in error path of nf_tables_newchain()

commit f5553c19ff9058136e7082c0b1f4268e705ea538 upstream.

Release statistics and module refcount on memory allocation problems.

Signed-off-by: Pablo Neira Ayuso <pablo at netfilter.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 net/netfilter/nf_tables_api.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index fe551ca01a98..e1cf0f89748d 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -1034,8 +1034,10 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
 		nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
 		trans = nft_trans_alloc(&ctx, NFT_MSG_NEWCHAIN,
 					sizeof(struct nft_trans_chain));
-		if (trans == NULL)
+		if (trans == NULL) {
+			free_percpu(stats);
 			return -ENOMEM;
+		}

 		nft_trans_chain_stats(trans) = stats;
 		nft_trans_chain_update(trans) = true;
@@ -1091,8 +1093,10 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
 		hookfn = type->hooks[hooknum];

 		basechain = kzalloc(sizeof(*basechain), GFP_KERNEL);
-		if (basechain == NULL)
+		if (basechain == NULL) {
+			module_put(type->owner);
 			return -ENOMEM;
+		}

 		if (nla[NFTA_CHAIN_COUNTERS]) {
 			stats = nft_stats_alloc(nla[NFTA_CHAIN_COUNTERS]);