From fe66afa58071e7140aea7dfaf86cfce9e846a124 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Thu, 3 Jun 2021 12:52:37 +0100
Subject: [PATCH] Guard against reading beyond partition end when identifying
 UNICOS filesystem. Fixes #581

---
 Aaru.Filesystems/UNICOS.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Aaru.Filesystems/UNICOS.cs b/Aaru.Filesystems/UNICOS.cs
index 91ab3b9c9..49589dc3f 100644
--- a/Aaru.Filesystems/UNICOS.cs
+++ b/Aaru.Filesystems/UNICOS.cs
@@ -75,6 +75,9 @@ namespace Aaru.Filesystems
             if(Marshal.SizeOf<Superblock>() % imagePlugin.Info.SectorSize != 0)
                 sbSize++;
 
+            if(partition.Start + sbSize >= partition.End)
+                return false;
+
             byte[] sector = imagePlugin.ReadSectors(partition.Start, sbSize);
 
             if(sector.Length < Marshal.SizeOf<Superblock>())