[Qemu-devel] [PATCH 05/17] monitor: Don't change VNC server when disabled

[Jan Kiszka]

Avoid a segfault when the user issues 'change vnc' without having vnc
enabled on startup.

Signed-off-by: Jan Kiszka <address@hidden>
---

 vnc.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/vnc.c b/vnc.c
index 68df599..bdfc79b 100644
--- a/vnc.c
+++ b/vnc.c
@@ -2333,6 +2333,8 @@ void vnc_display_close(DisplayState *ds)
 {
     VncState *vs = ds ? (VncState *)ds->opaque : vnc_state;
 
+    if (!vs)
+        return;
     if (vs->display) {
        qemu_free(vs->display);
        vs->display = NULL;
@@ -2392,6 +2394,8 @@ int vnc_display_open(DisplayState *ds, const char 
*display)
     int tls = 0, x509 = 0;
 #endif
 
+    if (!vnc_state)
+        return -1;
     vnc_display_close(ds);
     if (strcmp(display, "none") == 0)
        return 0;