kata-containers/cloud-hypervisor
1
0
Fork 0
mirror of https://github.com/cloud-hypervisor/cloud-hypervisor.git synced 2026-08-05 02:19:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

vm-virtio: Close file descriptors created by epoll::create()

Browse Source 
This patch fixes file descriptor leak related to epoll::create() from
various virtio devices.

Fixes: #1124

Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen
2020-05-14 19:25:54 -07:00
committed by Sebastien Boeuf
parent 039accc139
commit 35782bd9f8
11 changed files with 102 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
vm-virtio/src/mem.rs
View File

@@ -22,9 +22,10 @@ use epoll;
use libc;
use libc::EFD_NONBLOCK;
use std::cmp;
use std::fs::File;
use std::io::{self, Write};
use std::mem::size_of;
use std::os::unix::io::{AsRawFd, RawFd};
use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};
use std::result;
use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
use std::sync::mpsc;
@@ -596,10 +597,12 @@ impl MemEpollHandler {
fn run(&mut self, paused: Arc<AtomicBool>) -> result::Result<(), DeviceError> {
// Create the epoll file descriptor
let epoll_fd = epoll::create(true).map_err(DeviceError::EpollCreateFd)?;
// Use 'File' to enforce closing on 'epoll_fd'
let epoll_file = unsafe { File::from_raw_fd(epoll_fd) };
// Add events
epoll::ctl(
epoll_fd,
epoll_file.as_raw_fd(),
epoll::ControlOptions::EPOLL_CTL_ADD,
self.resize.evt.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, u64::from(RESIZE_EVENT)),
@@ -607,7 +610,7 @@ impl MemEpollHandler {
.map_err(DeviceError::EpollCtl)?;
epoll::ctl(
epoll_fd,
epoll_file.as_raw_fd(),
epoll::ControlOptions::EPOLL_CTL_ADD,
self.queue_evt.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, u64::from(QUEUE_AVAIL_EVENT)),
@@ -615,7 +618,7 @@ impl MemEpollHandler {
.map_err(DeviceError::EpollCtl)?;
epoll::ctl(
epoll_fd,
epoll_file.as_raw_fd(),
epoll::ControlOptions::EPOLL_CTL_ADD,
self.kill_evt.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, u64::from(KILL_EVENT)),
@@ -623,7 +626,7 @@ impl MemEpollHandler {
.map_err(DeviceError::EpollCtl)?;
epoll::ctl(
epoll_fd,
epoll_file.as_raw_fd(),
epoll::ControlOptions::EPOLL_CTL_ADD,
self.pause_evt.as_raw_fd(),
epoll::Event::new(epoll::Events::EPOLLIN, u64::from(PAUSE_EVENT)),
@@ -634,7 +637,7 @@ impl MemEpollHandler {
let mut events = vec![epoll::Event::new(epoll::Events::empty(), 0); EPOLL_EVENTS_LEN];
'epoll: loop {
let num_events = match epoll::wait(epoll_fd, -1, &mut events[..]) {
let num_events = match epoll::wait(epoll_file.as_raw_fd(), -1, &mut events[..]) {
Ok(res) => res,
Err(e) => {
if e.kind() == io::ErrorKind::Interrupted {