Messages in this thread Patch in this message | | | Date | Mon, 3 Jun 2013 02:27:25 -0700 (PDT) | From | Dan Carpenter <> | Subject | [patch] fanotify: info leak in copy_event_to_user() |
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The ->reserverd field isn't cleared so we leak one byte of stack information to userspace.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 6c80083..77cc85d 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -122,6 +122,7 @@ static int fill_event_metadata(struct fsnotify_group *group, metadata->event_len = FAN_EVENT_METADATA_LEN; metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; + metadata->reserved = 0; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); if (unlikely(event->mask & FAN_Q_OVERFLOW))
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