prosody
c6465fb3c839
util-src/ringbuffer.c

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util-src/ringbuffer.c @ 10898:c6465fb3c839

util.ringbuffer: Prevent creation of zero-size buffer
author Kim Alvefur <zash@zash.se>
date Fri, 29 May 2020 18:11:42 +0200
parent 10480:94cacf9fd0ae
child 10899:8048255ae61e
line wrap: on
line diff
--- a/util-src/ringbuffer.c	Fri May 29 17:53:00 2020 +0200
+++ b/util-src/ringbuffer.c	Fri May 29 18:11:42 2020 +0200
@@ -198,6 +198,7 @@
 
 static int rb_new(lua_State *L) {
 	size_t 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);
 
 	b->rpos = 0;