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| author | Ilya Maximets <i.maximets@samsung.com> | 2018-10-08 19:05:36 +0300 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2019-04-08 16:50:20 -0500 |
| commit | a4a50214137f7f46c52fc90b6ba5f084e4f9c88e (patch) | |
| tree | 4b84084d9c2581bc51bebaa554cfef826a30f6a7 | |
| parent | a0380bdae91be55e38af3d9e1ba30e82a5abecea (diff) | |
| download | qemu-a4a50214137f7f46c52fc90b6ba5f084e4f9c88e.zip qemu-a4a50214137f7f46c52fc90b6ba5f084e4f9c88e.tar.gz qemu-a4a50214137f7f46c52fc90b6ba5f084e4f9c88e.tar.bz2 | |
vhost-user: Fix userfaultfd leak
'fd' received from the vhost side is never freed.
Also, everything (including 'postcopy_listen' state) should be
cleaned up on vhost cleanup.
Fixes: 46343570c06e ("vhost+postcopy: Wire up POSTCOPY_END notify")
Fixes: f82c11165ffa ("vhost+postcopy: Register shared ufd with postcopy")
Cc: qemu-stable@nongnu.org
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Message-Id: <20181008160536.6332-3-i.maximets@samsung.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit c4f753859ae6da1aeb93cad19c586fea1925e269)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
| -rw-r--r-- | hw/virtio/vhost-user.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index c442daa..e09bed0 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -1280,6 +1280,7 @@ static int vhost_user_postcopy_end(struct vhost_dev *dev, Error **errp) return ret; } postcopy_unregister_shared_ufd(&u->postcopy_fd); + close(u->postcopy_fd.fd); u->postcopy_fd.handler = NULL; trace_vhost_user_postcopy_end_exit(); @@ -1419,6 +1420,12 @@ static int vhost_user_backend_cleanup(struct vhost_dev *dev) postcopy_remove_notifier(&u->postcopy_notifier); u->postcopy_notifier.notify = NULL; } + u->postcopy_listen = false; + if (u->postcopy_fd.handler) { + postcopy_unregister_shared_ufd(&u->postcopy_fd); + close(u->postcopy_fd.fd); + u->postcopy_fd.handler = NULL; + } if (u->slave_fd >= 0) { qemu_set_fd_handler(u->slave_fd, NULL, NULL, NULL); close(u->slave_fd); |