>From f646f955ea2e47d2aeb79e66f043f1a5039c6f35 Mon Sep 17 00:00:00 2001
From: Bruno Vasselle <bruno.vasse...@laposte.net>
Date: Thu, 24 Feb 2011 19:11:57 +0100
Subject: [PATCH] Division by zero in wcmInitArea when KEEP_SHAPE_FLAG is on.
Under some circumstances, wcmInitArea faces a division by zero when trying to
deal with the "KeepShape" option. The patch disables KeepShape in the situation.
Signed-off-by: Bruno Vasselle <bruno.vasse...@laposte.net>
---
src/xf86Wacom.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/src/xf86Wacom.c b/src/xf86Wacom.c
index e8c4710..5cdb300 100644
--- a/src/xf86Wacom.c
+++ b/src/xf86Wacom.c
@@ -116,6 +116,14 @@ static int wcmInitArea(InputInfoPtr pInfo)
/* Maintain aspect ratio to the whole desktop
* May need to consider a specific screen in multimonitor settings
*/
+ if ((priv->flags & KEEP_SHAPE_FLAG) &&
+ (priv->maxHeight == 0)) /* safeguard in case screen ratio is
unknown */
+ {
+ xf86Msg(X_WARNING,
+ "%s: disabling option \"KeepShape\" as screen shape is
not accessible\n",
+ pInfo->name);
+ priv->flags &= ~KEEP_SHAPE_FLAG;
+ }
if (priv->flags & KEEP_SHAPE_FLAG)
{
--
1.7.4
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