From 43d844eca4d3c705d19c8922f71932fc5882a0be Mon Sep 17 00:00:00 2001
From: Adam Halim <adaab301@student.liu.se>
Date: Mon, 12 Jun 2023 10:44:43 +0200
Subject: [PATCH] Fix shared memory leak

The MIT-SHM documentation:
  https://www.x.org/releases/X11R7.7/doc/xextproto/shm.html
says to run XShmDetach() first, and then to destroy the segment.

(cherry picked from commit 585ee24d4cd81759ca7206d5d5181a491c2e8898)
---
 unix/x0vncserver/Image.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unix/x0vncserver/Image.cxx b/unix/x0vncserver/Image.cxx
index 92d629f3aa..755da787a1 100644
--- a/unix/x0vncserver/Image.cxx
+++ b/unix/x0vncserver/Image.cxx
@@ -312,8 +312,8 @@ void ShmImage::Init(int width, int height, const XVisualInfo *vinfo)
 
 ShmImage::~ShmImage()
 {
-  // FIXME: Destroy image as described in MIT-SHM documentation.
   if (shminfo != NULL) {
+    XShmDetach(dpy, shminfo);
     shmdt(shminfo->shmaddr);
     shmctl(shminfo->shmid, IPC_RMID, 0);
     delete shminfo;