!8 gdisk: backport one patch for solving potential segfault problem

From: @liuzhiqiang26
Reviewed-by: @lixiaokeng,@wubo009
Signed-off-by: @wubo009,@wubo009

0001-Fix-segfault-on-some-weird-data-structures.patch

@@ -0,0 +1,72 @@
+From 81c8bbee46ad6ebacf72eae70ba5147f376205a4 Mon Sep 17 00:00:00 2001
+From: Rod Smith <rodsmith@rodsbooks.com>
+Date: Mon, 14 Sep 2020 10:08:18 -0400
+Subject: [PATCH] Fix segfault on some weird data structures
+
+---
+ NEWS      |  6 ++++++
+ gpt.cc    | 13 ++++++++++++-
+ support.h |  2 +-
+ 3 files changed, 19 insertions(+), 2 deletions(-)
+
+diff --git a/NEWS b/NEWS
+index 54c865e..bac3da3 100644
+--- a/NEWS
++++ b/NEWS
+@@ -1,3 +1,9 @@
++1.0.6 (?/??/2020):
++------------------
++
++- Fixed bug that could cause segfault if GPT header claimed partition
++  entries are oversized.
++
+ 1.0.5 (2/17/2020):
+ ------------------
+ 
+diff --git a/gpt.cc b/gpt.cc
+index fe8e956..1b4e10f 100644
+--- a/gpt.cc
++++ b/gpt.cc
+@@ -1041,6 +1041,14 @@ int GPTData::LoadHeader(struct GPTHeader *header, DiskIO & disk, uint64_t sector
+    } // if
+    *crcOk = CheckHeaderCRC(&tempHeader);
+ 
++   if (tempHeader.sizeOfPartitionEntries != sizeof(GPTPart)) {
++       cerr << "Warning: Partition table header claims that the size of partition table\n";
++       cerr << "entries is " << tempHeader.sizeOfPartitionEntries << " bytes, but this program ";
++       cerr << " supports only " << sizeof(GPTPart) << "-byte entries.\n";
++       cerr << "Adjusting accordingly, but partition table may be garbage.\n";
++       tempHeader.sizeOfPartitionEntries = sizeof(GPTPart);
++   }
++
+    if (allOK && (numParts != tempHeader.numParts) && *crcOk) {
+       allOK = SetGPTSize(tempHeader.numParts, 0);
+    }
+@@ -1058,7 +1066,10 @@ int GPTData::LoadPartitionTable(const struct GPTHeader & header, DiskIO & disk,
+    uint32_t sizeOfParts, newCRC;
+    int retval;
+ 
+-   if (disk.OpenForRead()) {
++   if (header.sizeOfPartitionEntries != sizeof(GPTPart)) {
++      cerr << "Error! GPT header contains invalid partition entry size!\n";
++      retval = 0;
++   } else if (disk.OpenForRead()) {
+       if (sector == 0) {
+          retval = disk.Seek(header.partitionEntriesLBA);
+       } else {
+diff --git a/support.h b/support.h
+index 9a79b95..978bfe1 100644
+--- a/support.h
++++ b/support.h
+@@ -8,7 +8,7 @@
+ #ifndef __GPTSUPPORT
+ #define __GPTSUPPORT
+ 
+-#define GPTFDISK_VERSION "1.0.5"
++#define GPTFDISK_VERSION "1.0.5.1"
+ 
+ #if defined (__FreeBSD__) || defined (__FreeBSD_kernel__) || defined (__APPLE__)
+ // Darwin (Mac OS) & FreeBSD: disk IOCTLs are different, and there is no lseek64
+-- 
+1.8.3.1
+

gdisk.spec

@@ -1,11 +1,14 @@
 Name:    gdisk
 Version: 1.0.5
-Release: 2
+Release: 3
 Summary: GPT fdisk(consisting of the gdisk,sgdisk,cgdisk) is a set of text-mode partitioning tools
 License: GPLv2
 URL:     http://www.rodsbooks.com/gdisk
 Source0: http://downloads.sourceforge.net/gptfdisk/gptfdisk-%{version}.tar.gz
 
+Patch1:	 0001-Fix-segfault-on-some-weird-data-structures.patch
+
+
 BuildRequires:ncurses-devel util-linux-devel gcc-c++ popt-devel git gdb
 
 %description
@@ -45,6 +48,9 @@ install -Dp -m 0644 fixparts.8 %{buildroot}%{_mandir}/man8/fixparts.8
 %{_mandir}/man8/*
 
 %changelog
+* Thu Oct 29 2020 Zhiqiang Liu <liuzhiqiang26@huawei.com> - 1.0.5-3
+- backport one patch for solving potential segfault problem.
+
 * Mon Aug 10 2020 volcanodragon <linfeilong@huawei.com> - 1.0.5-2
 - upgrade yaml