From a928a08f9d9c5fab3f0619dbec3663708a6ab6b9 Mon Sep 17 00:00:00 2001
From: John Reiser <jreiser@BitWagon.com>
Date: Fri, 6 Nov 2020 19:14:18 -0800
Subject: [PATCH] ptrTEXT in PackMachBase<T>::canUnpack()

https://github.com/upx/upx/issues/417
	modified:   p_mach.cpp
---
 src/p_mach.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/p_mach.cpp b/src/p_mach.cpp
index 4881c7b1..6ce76ff3 100644
--- a/src/p_mach.cpp
+++ b/src/p_mach.cpp
@@ -1606,7 +1606,7 @@ int PackMachBase<T>::canUnpack()
     if (3==nseg && 395 != style) { // __PAGEZERO, __TEXT, __LINKEDIT;  no __XHDR, no UPX_DATA
         style = 392;
     }
-    if (391==style && 0==offLINK && 2==ncmds) { // pre-3.91 ?
+    if (391==style && 0==offLINK && 2==ncmds && ptrTEXT) { // pre-3.91 ?
         offLINK = ptrTEXT->fileoff + ptrTEXT->filesize;  // fake __LINKEDIT at EOF
     }
     if (0 == style || 0 == offLINK) {