From c46469847b68f6a1a5b42feaf0de7a83fd0bed85 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Wed, 9 Jan 2019 17:10:06 +0100
Subject: [PATCH 2/4] MdePkg BaseUefiDecompressLib: Fix UEFI Decompression
 logic issue
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Message-id: <20190109161007.3471-3-philmd@redhat.com>
Patchwork-id: 83923
O-Subject:  [RHEL8 edk2 PATCH 2/3] MdePkg BaseUefiDecompressLib: Fix UEFI
	Decompression logic issue
Bugzilla: 1662184
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Vitaly Kuznetsov <vkuznets@redhat.com>

From: Liming Gao <liming.gao@intel.com>

https://bugzilla.tianocore.org/show_bug.cgi?id=1317

This is a regression issue caused by 2ec7953d49677142c5f7552e9e3d96fb406ba0c4.
In Decode() function, once mOutBuf is fully filled, Decode() should return.
Current logic misses the checker of mOutBuf after while() loop.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>
(cherry picked from commit 1c4cecc9fd314de0dce8125b0d4b45967637a401)
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
index 0c6b1fe..8c30e97 100644
--- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
+++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
@@ -641,6 +641,12 @@ Decode (
 
         BytesRemain--;
       }
+      //
+      // Once mOutBuf is fully filled, directly return
+      //
+      if (Sd->mOutBuf >= Sd->mOrigSize) {
+        goto Done;
+      }
     }
   }
 
-- 
1.8.3.1