From 5af441d16bdb3043772100ea5db2a1955fcf30b6 Mon Sep 17 00:00:00 2001
From: Marco van Dijk <marco@stronk.rocks>
Date: Wed, 30 Aug 2023 13:14:00 +0200
Subject: [PATCH] Fixes for segfaults when the connection to the metadata gets
 lost Set stream RelAccx pages to null pointers if we cannot reload those
 pages

---
 lib/dtsc.cpp               | 2 ++
 src/input/input.cpp        | 4 ++++
 src/input/input_buffer.cpp | 7 +++++++
 3 files changed, 13 insertions(+)

diff --git a/lib/dtsc.cpp b/lib/dtsc.cpp
index e9c959d6..b821450e 100644
--- a/lib/dtsc.cpp
+++ b/lib/dtsc.cpp
@@ -1298,6 +1298,8 @@ namespace DTSC{
       streamPage.init(pageName, 0, false, true);
       if (!streamPage.mapped){
         INFO_MSG("Page %s not found", pageName);
+        stream = Util::RelAccX();
+        trackList = Util::RelAccX();
         return true;
       }
       stream = Util::RelAccX(streamPage.mapped, true);
diff --git a/src/input/input.cpp b/src/input/input.cpp
index 8006dbef..cf46c699 100644
--- a/src/input/input.cpp
+++ b/src/input/input.cpp
@@ -846,6 +846,10 @@ namespace Mist{
 
       // unload pages that haven't been used for a while
       removeUnused();
+      if (!M){
+        Util::logExitReason(ER_SHM_LOST, "Lost connection to metadata");
+        break;
+      }
 
       if (M.getLive() && !internalOnly){
         uint64_t currLastUpdate = M.getLastUpdated();
diff --git a/src/input/input_buffer.cpp b/src/input/input_buffer.cpp
index 1869fb49..088494de 100644
--- a/src/input/input_buffer.cpp
+++ b/src/input/input_buffer.cpp
@@ -187,6 +187,10 @@ namespace Mist{
   /// Detected issues in string format, or empty string if no issues
   /// ~~~~~~~~~~~~~~~
   void inputBuffer::updateMeta(){
+    if (!M){
+      Util::logExitReason(ER_SHM_LOST, "Lost connection to metadata");
+      return;
+    }
     static bool wentDry = false;
     static uint64_t lastFragCount = 0xFFFFull;
     static uint32_t lastBPS = 0; /*LTS*/
@@ -329,6 +333,9 @@ namespace Mist{
 
   void inputBuffer::removeUnused(){
     meta.reloadReplacedPagesIfNeeded();
+    if (!meta){
+      return;
+    }
     // first remove all tracks that have not been updated for too long
     bool changed = true;
     while (changed){