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https://github.com/archlinuxarm/PKGBUILDs.git
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35 lines
1.2 KiB
Diff
35 lines
1.2 KiB
Diff
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From 919f1f46fc67dae93b2b3f278fcbfc77af34ec58 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <mdaenzer@redhat.com>
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Date: Mon, 31 Aug 2020 12:10:43 +0200
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Subject: [PATCH] xfree86: Take second reference for SavedCursor in
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xf86CursorSetCursor
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The same pointer is kept in CurrentCursor as well, therefore two
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RefCursor calls are needed.
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Fixes use-after-free after switching VTs.
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Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1067
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Signed-off-by: Laurent Carlier <lordheavym@gmail.com>
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---
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hw/xfree86/ramdac/xf86CursorRD.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/hw/xfree86/ramdac/xf86CursorRD.c b/hw/xfree86/ramdac/xf86CursorRD.c
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index 9aa3de97b..c8362d169 100644
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--- a/hw/xfree86/ramdac/xf86CursorRD.c
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+++ b/hw/xfree86/ramdac/xf86CursorRD.c
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@@ -334,6 +334,9 @@ xf86CursorSetCursor(DeviceIntPtr pDev, ScreenPtr pScreen, CursorPtr pCurs,
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ScreenPriv->HotY = cursor->bits->yhot;
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if (!infoPtr->pScrn->vtSema) {
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+ cursor = RefCursor(cursor);
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+ if (ScreenPriv->SavedCursor)
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+ FreeCursor(ScreenPriv->SavedCursor, None);
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ScreenPriv->SavedCursor = cursor;
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return;
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}
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--
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2.28.0
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