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util.ringbuffer: Prevent creation of buffer with negative size

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Previously this would have been (unsigned)-1 which is a large positive
integer.
This commit is contained in:
Kim Alvefur 2020-06-04 16:11:08 +02:00
parent 0bb1474ce6
commit 4bab7af07d
2 changed files with 6 additions and 1 deletions
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2
util-src/ringbuffer.c
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@ -197,7 +197,7 @@ static int rb_free(lua_State *L) {
}
static int rb_new(lua_State *L) {
size_t size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
lua_Integer size = luaL_optinteger(L, 1, sysconf(_SC_PAGESIZE));
luaL_argcheck(L, size > 0, 1, "positive integer expected");
ringbuffer *b = lua_newuserdata(L, sizeof(ringbuffer) + size);