1 files changed, 1 insertions, 1 deletions

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index afa952e726d..9b9b2c31dd1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3144,7 +3144,7 @@ static int sctp_setsockopt_auth_key(struct sock *sk,
                 goto out;
         }
 
-        if (authkey->sca_keylength > optlen) {
+        if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) {
                 ret = -EINVAL;
                 goto out;
         }