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Subject[PATCH 3.16.y-ckt 002/165] netfilter: nf_tables: fix leaks in error path of nf_tables_newchain()
Date
3.16.7-ckt9 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pablo Neira Ayuso <pablo@netfilter.org>

commit f5553c19ff9058136e7082c0b1f4268e705ea538 upstream.

Release statistics and module refcount on memory allocation problems.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Luis Henriques <luis.henriques@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]);

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