vnc: fix double free issues

Reported by Coverity: CID 1371242, 1371243, 1371244.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Daniel P. Berrange <berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 1487682332-29154-1-git-send-email-kraxel@redhat.com

1 files changed, 3 insertions, 0 deletions

diff --git a/ui/vnc.c b/ui/vnc.c
index 62e85edf5d..51f4b30959 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -3181,6 +3181,7 @@ static void vnc_display_close(VncDisplay *vd)
     g_free(vd->lsock);
     g_free(vd->lsock_tag);
     vd->lsock = NULL;
+    vd->lsock_tag = NULL;
     vd->nlsock = 0;
 
     for (i = 0; i < vd->nlwebsock; i++) {
@@ -3192,6 +3193,7 @@ static void vnc_display_close(VncDisplay *vd)
     g_free(vd->lwebsock);
     g_free(vd->lwebsock_tag);
     vd->lwebsock = NULL;
+    vd->lwebsock_tag = NULL;
     vd->nlwebsock = 0;
 
     vd->auth = VNC_AUTH_INVALID;
@@ -3204,6 +3206,7 @@ static void vnc_display_close(VncDisplay *vd)
     vd->tlsaclname = NULL;
     if (vd->lock_key_sync) {
         qemu_remove_led_event_handler(vd->led);
+        vd->led = NULL;
     }
 }