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Don't allow for scroll distances of 0 (#49965)

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It'll either hang the server or blow up with divisions by 0, whichever one
comes first.

X.Org Bug 49965 <http://bugs.freedesktop.org/show_bug.cgi?id=49965>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
This commit is contained in:
Peter Hutterer
2012-05-17 12:10:04 +10:00
parent cd569377cd
commit 6d47d334d8
1 changed files with 6 additions and 0 deletions
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6
src/properties.c
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@@ -471,6 +471,9 @@ SetProperty(DeviceIntPtr dev, Atom property, XIPropertyValuePtr prop,
return BadMatch;
dist = (INT32 *) prop->data;
if (dist[0] == 0 || dist[1] == 0)
return BadValue;
if (para->scroll_dist_vert != dist[0]) {
para->scroll_dist_vert = dist[0];
SetScrollValuator(dev, priv->scroll_axis_vert, SCROLL_TYPE_VERTICAL,
@@ -589,6 +592,9 @@ SetProperty(DeviceIntPtr dev, Atom property, XIPropertyValuePtr prop,
return BadMatch;
circdist = *(float *) prop->data;
if (circdist == 0)
return BadValue;
para->scroll_dist_circ = circdist;
}
else if (property == prop_circscroll_trigger) {