diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-04-28 16:03:48 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-30 22:41:29 -0400 |
| commit | 39f37095990a39a0ee24f7621d06e9a6da6cd815 (patch) | |
| tree | 7925780e45f5ad3dc62a5b016b148aefd53f15d9 /net | |
| parent | 77041e89ce3d4efb9e2364b6d27e97d4bbca74fc (diff) | |
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.c | 7 |
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)) |