diff options
| -rw-r--r-- | util-src/crand.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/util-src/crand.c b/util-src/crand.c index cdc3c211..20871f3e 100644 --- a/util-src/crand.c +++ b/util-src/crand.c @@ -69,7 +69,9 @@ int getrandom(void *buf, size_t buflen, unsigned int flags) { int Lrandom(lua_State *L) { char smallbuf[SMALLBUFSIZ]; char *buf = &smallbuf[0]; - const size_t len = luaL_checkinteger(L, 1); + const lua_Integer l = luaL_checkinteger(L, 1); + const size_t len = l; + luaL_argcheck(L, l >= 0, 1, "must be > 0"); if(len > SMALLBUFSIZ) { buf = lua_newuserdata(L, len); |