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Fix SIGFPE for vnc display of width/height = 1

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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 <chris@arachsys.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Chris Webb 2010-03-08 14:34:49 +00:00 • committed by Anthony Liguori
parent 3c9c706c3b
commit cc39a92cbf
1 changed files with 4 additions and 2 deletions
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6
vnc.c
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@ -1457,8 +1457,10 @@ static void pointer_event(VncState *vs, int button_mask, int x, int y)
dz = 1; dz = 1;
if (vs->absolute) { if (vs->absolute) {
kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1), kbd_mouse_event(ds_get_width(vs->ds) > 1 ?
y * 0x7FFF / (ds_get_height(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); dz, buttons);
} else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) {
x -= 0x7FFF; x -= 0x7FFF;