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api: explicitly check handle validity in epoll_wait()

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This commit is contained in:
Bert Belder 2017-12-07 22:04:17 +01:00
parent 093e6f5240
commit 0f68b70114
1 changed files with 15 additions and 6 deletions
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21
src/api.c
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@ -121,7 +121,7 @@ int epoll_wait(HANDLE ephnd,
int timeout) {
reflock_tree_node_t* tree_node;
ep_port_t* port_info;
int result;
int num_events;
if (maxevents <= 0)
return_error(-1, ERROR_INVALID_PARAMETER);
@ -131,13 +131,22 @@ int epoll_wait(HANDLE ephnd,
tree_node =
reflock_tree_find_and_ref(&_epoll_handle_tree, (uintptr_t) ephnd);
if (tree_node == NULL)
return_handle_error(-1, ephnd, ERROR_INVALID_PARAMETER);
port_info = _handle_tree_node_to_port(tree_node);
if (tree_node == NULL) {
err_set_win_error(ERROR_INVALID_PARAMETER);
goto err;
}
result = ep_port_wait(port_info, events, maxevents, timeout);
port_info = _handle_tree_node_to_port(tree_node);
num_events = ep_port_wait(port_info, events, maxevents, timeout);
reflock_tree_node_unref(tree_node);
return result;
if (num_events < 0)
goto err;
return num_events;
err:
err_check_handle(ephnd);
return -1;
}