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net.poll: Guard against negative or too large FDs

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This commit is contained in:
Kim Alvefur 2018-10-07 18:44:46 +02:00
parent 31c8b1aca3
commit ceadb9c57c
1 changed files with 14 additions and 0 deletions
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14
util-src/poll.c
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@ -66,6 +66,13 @@ int Ladd(lua_State *L) {
int wantread = lua_toboolean(L, 3); int wantread = lua_toboolean(L, 3);
int wantwrite = lua_toboolean(L, 4); int wantwrite = lua_toboolean(L, 4);
if(fd < 0) {
lua_pushnil(L);
lua_pushstring(L, strerror(EBADF));
lua_pushinteger(L, EBADF);
return 3;
}
#ifdef USE_EPOLL #ifdef USE_EPOLL
struct epoll_event event; struct epoll_event event;
event.data.fd = fd; event.data.fd = fd;
@ -88,6 +95,13 @@ int Ladd(lua_State *L) {
#else #else
if(fd > FD_SETSIZE) {
lua_pushnil(L);
lua_pushstring(L, strerror(EBADF));
lua_pushinteger(L, EBADF);
return 3;
}
if(FD_ISSET(fd, &state->all)) { if(FD_ISSET(fd, &state->all)) {
lua_pushnil(L); lua_pushnil(L);
lua_pushstring(L, strerror(EEXIST)); lua_pushstring(L, strerror(EEXIST));