[Qemu-devel] [PATCH] Fix SIGFPE for vnc display of width/height = 1

[Chris Webb]

During boot, the screen gets resized to height 1 and a mouse click at this
point will cause a division by zero when calculating the absolute pointer
position from the pixel (x, y). Return a click in the middle of the screen
instead in this case.

Signed-off-by: Chris Webb <address@hidden>
---
 vnc.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/vnc.c b/vnc.c
index 01353a9..676a707 100644
--- a/vnc.c
+++ b/vnc.c
@@ -1457,8 +1457,10 @@ static void pointer_event(VncState *vs, int button_mask, 
int x, int y)
         dz = 1;
 
     if (vs->absolute) {
-        kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1),
-                        y * 0x7FFF / (ds_get_height(vs->ds) - 1),
+        kbd_mouse_event(ds_get_width(vs->ds) > 1 ?
+                          x * 0x7FFF / (ds_get_width(vs->ds) - 1) : 0x4000,
+                        ds_get_height(vs->ds) > 1 ?
+                          y * 0x7FFF / (ds_get_height(vs->ds) - 1) : 0x4000,
                         dz, buttons);
     } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
         x -= 0x7FFF;
-- 
1.7.0.1