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authorDan Carpenter <dan.carpenter@oracle.com>2017-04-28 16:03:48 +0300
committerDavid S. Miller <davem@davemloft.net>2017-04-30 22:41:29 -0400
commit39f37095990a39a0ee24f7621d06e9a6da6cd815 (patch)
tree7925780e45f5ad3dc62a5b016b148aefd53f15d9 /net
parent77041e89ce3d4efb9e2364b6d27e97d4bbca74fc (diff)
downloadlinux-39f37095990a39a0ee24f7621d06e9a6da6cd815.tar.bz2
lwtunnel: fix error path in lwtunnel_fill_encap()
We recently added a check to see if nla_nest_start() fails. There are two issues with that. First, if it fails then I don't think we should call nla_nest_cancel(). Second, it's slightly convoluted but the current code returns success but we should return -EMSGSIZE instead. Fixes: a50fe0ffd76f ("lwtunnel: check return value of nla_nest_start") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/lwtunnel.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c
index 5cbed3816229..cfae3d5fe11f 100644
--- a/net/core/lwtunnel.c
+++ b/net/core/lwtunnel.c
@@ -203,7 +203,7 @@ int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate)
{
const struct lwtunnel_encap_ops *ops;
struct nlattr *nest;
- int ret = -EINVAL;
+ int ret;
if (!lwtstate)
return 0;
@@ -212,10 +212,11 @@ int lwtunnel_fill_encap(struct sk_buff *skb, struct lwtunnel_state *lwtstate)
lwtstate->type > LWTUNNEL_ENCAP_MAX)
return 0;
- ret = -EOPNOTSUPP;
nest = nla_nest_start(skb, RTA_ENCAP);
if (!nest)
- goto nla_put_failure;
+ return -EMSGSIZE;
+
+ ret = -EOPNOTSUPP;
rcu_read_lock();
ops = rcu_dereference(lwtun_encaps[lwtstate->type]);
if (likely(ops && ops->fill_encap))