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Bug#1033668: marked as done (unblock: xorg-server/2:21.1.7-2)

Your message dated Wed, 29 Mar 2023 20:21:00 +0000
with message-id <E1phcI0-00EiZQ-Rz@respighi.debian.org>
and subject line unblock xorg-server
has caused the Debian Bug report #1033668,
regarding unblock: xorg-server/2:21.1.7-2
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
1033668: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1033668
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: release.debian.org
Severity: normal
User: release.debian.org@packages.debian.org
Usertags: unblock
X-Debbugs-Cc: jcristau@debian.org

Please unblock package xorg-server

[ Reason ]
CVE-2023-1393

[ Risks ]
Simple patch to reset a pointer to freed memory.

[ Checklist ]
  [x] all changes are documented in the d/changelog
  [x] I reviewed all changes and I approve them
  [x] attach debdiff against the package in testing

unblock xorg-server/2:21.1.7-2

diff --git a/composite/compwindow.c b/composite/compwindow.c
index 73a1871a0b..9a651636e3 100644
--- a/composite/compwindow.c
+++ b/composite/compwindow.c
@@ -620,6 +620,11 @@ compDestroyWindow(WindowPtr pWin)
     ret = (*pScreen->DestroyWindow) (pWin);
     cs->DestroyWindow = pScreen->DestroyWindow;
     pScreen->DestroyWindow = compDestroyWindow;
+
+    /* Did we just destroy the overlay window? */
+    if (pWin == cs->pOverlayWin)
+        cs->pOverlayWin = NULL;
+
 /*    compCheckTree (pWin->drawable.pScreen); can't check -- tree isn't good*/
     return ret;
 }
diff --git a/debian/changelog b/debian/changelog
index 0949487831..f7e8a40cb5 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+xorg-server (2:21.1.7-2) unstable; urgency=high
+
+  * composite: Fix use-after-free of the COW
+    ZDI-CAN-19866/CVE-2023-1393
+
+ -- Julien Cristau <jcristau@debian.org>  Wed, 29 Mar 2023 15:11:07 +0200
+
 xorg-server (2:21.1.7-1) unstable; urgency=medium
 
   * New upstream release

--- End Message ---
--- Begin Message --- 
Unblocked.

--- End Message ---
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