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-rw-r--r--net/ipv4/ip_tunnel.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 63e745aadab6..2f498f87e3d8 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -514,6 +514,9 @@ const struct ip_tunnel_encap_ops __rcu *
int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *ops,
unsigned int num)
{
+ if (num >= MAX_IPTUN_ENCAP_OPS)
+ return -ERANGE;
+
return !cmpxchg((const struct ip_tunnel_encap_ops **)
&iptun_encaps[num],
NULL, ops) ? 0 : -1;
@@ -525,6 +528,9 @@ int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *ops,
{
int ret;
+ if (num >= MAX_IPTUN_ENCAP_OPS)
+ return -ERANGE;
+
ret = (cmpxchg((const struct ip_tunnel_encap_ops **)
&iptun_encaps[num],
ops, NULL) == ops) ? 0 : -1;