--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1953,8 +1953,10 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
        void *dst = NULL;
        int off, pad = 0;
        unsigned int size_kern, match_size = mwt->match_size;
+       int len = strnlen(mwt->u.name, EBT_EXTENSION_MAXNAMELEN - 1);
 
-       strlcpy(name, mwt->u.name, sizeof(name));
+       memcpy(name, mwt->u.name, len);
+       name[len] = 0;
 
        if (state->buf_kern_start)
                dst = state->buf_kern_start + state->buf_kern_offset;