Merge branch 'for-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...

[linux-2.6-microblaze.git] / net / sctp / socket.c

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index e64e01f..6b937bf 100644 (file)
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4577,6 +4577,10 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname,
        }
 
        if (optlen > 0) {
+               /* Trim it to the biggest size sctp sockopt may need if necessary */
+               optlen = min_t(unsigned int, optlen,
+                              PAGE_ALIGN(USHRT_MAX +
+                                         sizeof(__u16) * sizeof(struct sctp_reset_streams)));
                kopt = memdup_sockptr(optval, optlen);
                if (IS_ERR(kopt))
                        return PTR_ERR(kopt);