main/x11/server/xorg-server/files/bug99358.patch

From 7198a6d4e74f684cb383b3e0f70dd2bae405e6e7 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 16 Jan 2017 22:17:36 +0000
Subject: xfree86: Take the input lock for xf86RecolorCursor

xf86RecolorCursor() may be called directly from XRecolorCursor as well
as from xf86ScreenSetCursor(). In the latter case, the input lock is
already held, but not for the former and so we need to add a wrapper
function that acquires the input lock before performing
xf86RecolorCursor()

References: https://bugs.freedesktop.org/show_bug.cgi?id=99358

diff --git a/hw/xfree86/ramdac/xf86HWCurs.c b/hw/xfree86/ramdac/xf86HWCurs.c
index 4481320..55d5861 100644
--- a/hw/xfree86/ramdac/xf86HWCurs.c
+++ b/hw/xfree86/ramdac/xf86HWCurs.c
@@ -22,6 +22,9 @@
 
 #include "servermd.h"
 
+static void
+xf86RecolorCursor_locked(xf86CursorScreenPtr ScreenPriv, CursorPtr pCurs);
+
 static CARD32
 xf86ReverseBitOrder(CARD32 v)
 {
@@ -204,7 +207,7 @@ xf86ScreenSetCursor(ScreenPtr pScreen, CursorPtr pCurs, int x, int y)
         if (!xf86DriverLoadCursorImage (infoPtr, bits))
             return FALSE;
 
-    xf86RecolorCursor(pScreen, pCurs, 1);
+    xf86RecolorCursor_locked (ScreenPriv, pCurs);
 
     (*infoPtr->SetCursorPosition) (infoPtr->pScrn, x, y);
 
@@ -312,12 +315,9 @@ xf86MoveCursor(ScreenPtr pScreen, int x, int y)
     input_unlock();
 }
 
-void
-xf86RecolorCursor(ScreenPtr pScreen, CursorPtr pCurs, Bool displayed)
+static void
+xf86RecolorCursor_locked(xf86CursorScreenPtr ScreenPriv, CursorPtr pCurs)
 {
-    xf86CursorScreenPtr ScreenPriv =
-        (xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
-                                               xf86CursorScreenKey);
     xf86CursorInfoPtr infoPtr = ScreenPriv->CursorInfoPtr;
 
     /* recoloring isn't applicable to ARGB cursors and drivers
@@ -357,6 +357,18 @@ xf86RecolorCursor(ScreenPtr pScreen, CursorPtr pCurs, Bool displayed)
     }
 }
 
+void
+xf86RecolorCursor(ScreenPtr pScreen, CursorPtr pCurs, Bool displayed)
+{
+    xf86CursorScreenPtr ScreenPriv =
+        (xf86CursorScreenPtr) dixLookupPrivate(&pScreen->devPrivates,
+                                               xf86CursorScreenKey);
+
+    input_lock();
+    xf86RecolorCursor_locked (ScreenPriv, pCurs);
+    input_unlock();
+}
+
 /* These functions assume that MaxWidth is a multiple of 32 */
 static unsigned char *
 RealizeCursorInterleave0(xf86CursorInfoPtr infoPtr, CursorPtr pCurs)
-- 
cgit v0.10.2

From cfddd919cce4178baba07959e5e862d02e166522 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 16 Jan 2017 22:36:34 +0000
Subject: xfree86: Take input lock for xf86TransparentCursor


diff --git a/hw/xfree86/ramdac/xf86HWCurs.c b/hw/xfree86/ramdac/xf86HWCurs.c
index 55d5861..26dc7e5 100644
--- a/hw/xfree86/ramdac/xf86HWCurs.c
+++ b/hw/xfree86/ramdac/xf86HWCurs.c
@@ -261,6 +261,8 @@ xf86SetTransparentCursor(ScreenPtr pScreen)
                                                xf86CursorScreenKey);
     xf86CursorInfoPtr infoPtr = ScreenPriv->CursorInfoPtr;
 
+    input_lock();
+
     if (!ScreenPriv->transparentData)
         ScreenPriv->transparentData =
             (*infoPtr->RealizeCursor) (infoPtr, NullCursor);
@@ -273,6 +275,8 @@ xf86SetTransparentCursor(ScreenPtr pScreen)
                                    ScreenPriv->transparentData);
 
     (*infoPtr->ShowCursor) (infoPtr->pScrn);
+
+    input_unlock();
 }
 
 static void
-- 
cgit v0.10.2

From 3eb964e25243056dd998f52d3b00171b71c89189 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 20 Jan 2017 09:49:19 +0000
Subject: xfree86: Take input_lock() for xf86ScreenCheckHWCursor


diff --git a/hw/xfree86/ramdac/xf86HWCurs.c b/hw/xfree86/ramdac/xf86HWCurs.c
index 26dc7e5..7043a9c 100644
--- a/hw/xfree86/ramdac/xf86HWCurs.c
+++ b/hw/xfree86/ramdac/xf86HWCurs.c
@@ -139,9 +139,14 @@ Bool
 xf86CheckHWCursor(ScreenPtr pScreen, CursorPtr cursor, xf86CursorInfoPtr infoPtr)
 {
     ScreenPtr pSlave;
+    Bool use_hw_cursor = TRUE;
 
-    if (!xf86ScreenCheckHWCursor(pScreen, cursor, infoPtr))
-        return FALSE;
+    input_lock();
+
+    if (!xf86ScreenCheckHWCursor(pScreen, cursor, infoPtr)) {
+        use_hw_cursor = FALSE;
+	goto unlock;
+    }
 
     /* ask each driver consuming a pixmap if it can support HW cursor */
     xorg_list_for_each_entry(pSlave, &pScreen->slave_list, slave_head) {
@@ -151,14 +156,22 @@ xf86CheckHWCursor(ScreenPtr pScreen, CursorPtr cursor, xf86CursorInfoPtr infoPtr
             continue;
 
         sPriv = dixLookupPrivate(&pSlave->devPrivates, xf86CursorScreenKey);
-        if (!sPriv) /* NULL if Option "SWCursor", possibly other conditions */
-            return FALSE;
+        if (!sPriv) { /* NULL if Option "SWCursor", possibly other conditions */
+            use_hw_cursor = FALSE;
+	    break;
+	}
 
         /* FALSE if HWCursor not supported by slave */
-        if (!xf86ScreenCheckHWCursor(pSlave, cursor, sPriv->CursorInfoPtr))
-            return FALSE;
+        if (!xf86ScreenCheckHWCursor(pSlave, cursor, sPriv->CursorInfoPtr)) {
+            use_hw_cursor = FALSE;
+	    break;
+	}
     }
-    return TRUE;
+
+unlock:
+    input_unlock();
+
+    return use_hw_cursor;
 }
 
 static Bool
-- 
cgit v0.10.2