1 files changed, 5 insertions, 0 deletions

diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index b9c2de84a8a2..0f0f94a40335 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -705,6 +705,11 @@ int datagram_send_ctl(struct net *net,
                         }
 
                         *hlimit = *(int *)CMSG_DATA(cmsg);
+                        if (*hlimit < -1 || *hlimit > 0xff) {
+                                err = -EINVAL;
+                                goto exit_f;
+                        }
+
                         break;
 
                 case IPV6_TCLASS: