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dix: protect from pScreen->SetCursorPosition == NULL 

It's safer not relying on all ScreenProc's actually filled.

../dix/events.c: In function ‘CheckPhysLimits’:
../dix/events.c:780:14: warning: dereference of NULL ‘pScreen’ [CWE-476] [-Wanalyzer-null-dereference]
  780 |             (*pScreen->SetCursorPosition)
      |             ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2025-05-06 14:44:13 +02:00
parent 654c9c1f3d
commit f1ba454733
4 changed files with 12 additions and 6 deletions
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3
Xi/xiwarppointer.c
View File

@ -178,7 +178,8 @@ ProcXIWarpPointer(ClientPtr client)
if (pSprite->hotShape) if (pSprite->hotShape)
ConfineToShape(pSprite->hotShape, &x, &y); ConfineToShape(pSprite->hotShape, &x, &y);
(*newScreen->SetCursorPosition) (pDev, newScreen, x, y, TRUE); if (newScreen->SetCursorPosition)
newScreen->SetCursorPosition(pDev, newScreen, x, y, TRUE);
} }
else if (!PointerConfinedToScreen(pDev)) { else if (!PointerConfinedToScreen(pDev)) {
NewCurrentScreen(pDev, newScreen, x, y); NewCurrentScreen(pDev, newScreen, x, y);

8
dix/events.c
View File

@ -558,7 +558,9 @@ XineramaSetCursorPosition(DeviceIntPtr pDev, int x, int y, Bool generateEvent)
x -= pScreen->x; x -= pScreen->x;
y -= pScreen->y; y -= pScreen->y;
return (*pScreen->SetCursorPosition) (pDev, pScreen, x, y, generateEvent); if (pScreen->SetCursorPosition)
return pScreen->SetCursorPosition(pDev, pScreen, x, y, generateEvent);
return TRUE;
} }
static void static void
@ -776,8 +778,8 @@ CheckPhysLimits(DeviceIntPtr pDev, CursorPtr cursor, Bool generateEvents,
{ {
if (pScreen != pSprite->hotPhys.pScreen) if (pScreen != pSprite->hotPhys.pScreen)
pSprite->hotPhys = new; pSprite->hotPhys = new;
(*pScreen->SetCursorPosition) if (pScreen && pScreen->SetCursorPosition)
(pDev, pScreen, new.x, new.y, generateEvents); pScreen->SetCursorPosition(pDev, pScreen, new.x, new.y, generateEvents);
} }
if (!generateEvents) if (!generateEvents)
SyntheticMotion(pDev, new.x, new.y); SyntheticMotion(pDev, new.x, new.y);

3
hw/xfree86/common/xf86RandR.c
View File

@ -330,7 +330,8 @@ xf86RandRSetConfig(ScreenPtr pScreen,
view_adjusted = TRUE; view_adjusted = TRUE;
} }
(*pScreen->SetCursorPosition) (dev, pScreen, px, py, FALSE); if (pScreen->SetCursorPosition)
pScreen->SetCursorPosition(dev, pScreen, px, py, FALSE);
} }
} }

4
hw/xfree86/dri/dri.c
View File

@ -2393,7 +2393,9 @@ DRIAdjustFrame(ScrnInfoPtr pScrn, int x, int y)
py = pScrn->frameY0; py = pScrn->frameY0;
if (py > pScrn->frameY1) if (py > pScrn->frameY1)
py = pScrn->frameY1; py = pScrn->frameY1;
pScreen->SetCursorPosition(inputInfo.pointer, pScreen, px, py, TRUE);
if (pScreen->SetCursorPosition)
pScreen->SetCursorPosition(inputInfo.pointer, pScreen, px, py, TRUE);
return; return;
} }