fanotify: Dont try to open a file descriptor for the overflow event
We should not try to open a file descriptor for the overflow event since this
will always fail.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index ca54957..dccd798 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -110,6 +110,8 @@
struct fanotify_event_metadata *metadata,
struct fsnotify_event *event)
{
+ int ret = 0;
+
pr_debug("%s: group=%p metadata=%p event=%p\n", __func__,
group, metadata, event);
@@ -117,9 +119,15 @@
metadata->vers = FANOTIFY_METADATA_VERSION;
metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS;
metadata->pid = pid_vnr(event->tgid);
- metadata->fd = create_fd(group, event);
+ if (unlikely(event->mask & FAN_Q_OVERFLOW))
+ metadata->fd = FAN_NOFD;
+ else {
+ metadata->fd = create_fd(group, event);
+ if (metadata->fd < 0)
+ ret = metadata->fd;
+ }
- return metadata->fd;
+ return ret;
}
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
@@ -261,7 +269,7 @@
if (ret < 0)
goto out;
- fd = ret;
+ fd = fanotify_event_metadata.fd;
ret = prepare_for_access_response(group, event, fd);
if (ret)
goto out_close_fd;
@@ -275,7 +283,8 @@
out_kill_access_response:
remove_access_response(group, event, fd);
out_close_fd:
- sys_close(fd);
+ if (fd != FAN_NOFD)
+ sys_close(fd);
out:
#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS
if (event->mask & FAN_ALL_PERM_EVENTS) {