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util.crand: Throw an error for sizes smaller than 1 byte

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Kim Alvefur 2017-12-03 15:36:20 +01:00
parent abb425e70f
commit 96d9651ece
1 changed files with 3 additions and 1 deletions
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4
util-src/crand.c
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@ -69,7 +69,9 @@ int getrandom(void *buf, size_t buflen, unsigned int flags) {
int Lrandom(lua_State *L) { int Lrandom(lua_State *L) {
char smallbuf[SMALLBUFSIZ]; char smallbuf[SMALLBUFSIZ];
char *buf = &smallbuf[0]; 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) { if(len > SMALLBUFSIZ) {
buf = lua_newuserdata(L, len); buf = lua_newuserdata(L, len);