Merge branches 'x86/alternatives', 'x86/cleanups', 'x86/commandline', 'x86/crashdump...

[cascardo/linux.git] / net / sctp / socket.c

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index afa952e..5ffb9de 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3086,6 +3086,7 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
                                    int optlen)
 {
        struct sctp_hmacalgo *hmacs;
+       u32 idents;
        int err;
 
        if (!sctp_auth_enable)
@@ -3103,8 +3104,9 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk,
                goto out;
        }
 
-       if (hmacs->shmac_num_idents == 0 ||
-           hmacs->shmac_num_idents > SCTP_AUTH_NUM_HMACS) {
+       idents = hmacs->shmac_num_idents;
+       if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
+           (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) {
                err = -EINVAL;
                goto out;
        }
@@ -3144,7 +3146,7 @@ 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;
        }