# HG changeset patch
# User jbe
# Date 1429291223 -7200
# Node ID 2097b1835d9685f5fc9baa38b020f7d091472dc9
# Parent  46ebdc5bf8257e9dffcf5176f0da3b851978c876
Check if file descriptors are in valid range before using them for select

diff -r 46ebdc5bf825 -r 2097b1835d96 moonbridge_io.c
--- a/moonbridge_io.c	Thu Apr 16 22:20:33 2015 +0200
+++ b/moonbridge_io.c	Fri Apr 17 19:20:23 2015 +0200
@@ -1043,6 +1043,7 @@
             if (!isnum) luaL_error(L, "Expected integer (file descriptor), I/O handle, or listener in table key");
           }
         }
+        if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
         FD_SET(fd, &readfds);
         if (fd+1 > nfds) nfds = fd+1;
       }
@@ -1063,6 +1064,7 @@
           fd = lua_tointegerx(L, -2, &isnum);
           if (!isnum) luaL_error(L, "Expected integer (file descriptor) or I/O handle in table key");
         }
+        if (fd < 0 || fd >= FD_SETSIZE) luaL_error(L, "File descriptor out of valid range");
         FD_SET(fd, &writefds);
         if (fd+1 > nfds) nfds = fd+1;
       }