From: Robert Luberda <robert@debian.org>
Date: Sat, 19 Nov 2016 08:48:08 +0100
Subject: Fix nullptr dereference (CVE-2016-9296)

Patch taken from https://sourceforge.net/p/p7zip/bugs/185/
This patch file taken from Debian's patch set for p7zip
---
 CPP/7zip/Archive/7z/7zIn.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/CPP/7zip/Archive/7z/7zIn.cpp b/CPP/7zip/Archive/7z/7zIn.cpp
index b0c6b98..7c6dde2 100644
--- a/CPP/7zip/Archive/7z/7zIn.cpp
+++ b/CPP/7zip/Archive/7z/7zIn.cpp
@@ -1097,7 +1097,8 @@ HRESULT CInArchive::ReadAndDecodePackedStreams(
       if (CrcCalc(data, unpackSize) != folders.FolderCRCs.Vals[i])
         ThrowIncorrect();
   }
-  HeadersSize += folders.PackPositions[folders.NumPackStreams];
+  if (folders.PackPositions)
+      HeadersSize += folders.PackPositions[folders.NumPackStreams];
   return S_OK;
 }
 
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<div class='path'>path: <a href='/guix/log/?id=0be4d0947968168cacffe62e2a6fbfea9bee1683'>root</a>/<a href='/guix/log/tests?id=0be4d0947968168cacffe62e2a6fbfea9bee1683'>tests</a>/<a href='/guix/log/tests/services.scm?id=0be4d0947968168cacffe62e2a6fbfea9bee1683'>services.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/services.scm?id=0be4d0947968168cacffe62e2a6fbfea9bee1683&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-05-18 22:29:54 +0200'>2022-05-18</span></td><td><a href='/guix/commit/tests/services.scm?id=3948ac25b1dccc40c7fdf56377f94a0775a835ee'>services: Make &lt;service-type&gt; 'description' field mandatory.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services.scm (&lt;service-type&gt;)[description]: Remove default value.
* tests/services.scm: Add 'description' field to each 'service-type' form.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-04-10 01:24:30 +0200'>2022-04-10</span></td><td><a href='/guix/commit/tests/services.scm?id=ec6a585ee2fd91c857276479411eedd0756e0093'>services: Test 'shepherd-service-upgrade' with transient services.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to eeb8ac43c8c0b0cc69422766070dbefc55f5c5c1.

* tests/services.scm ("shepherd-service-upgrade: transient service"):
New test.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-04-10 01:15:13 +0200'>2022-04-10</span></td><td><a href='/guix/commit/tests/services.scm?id=e25eca35ff04e4234d0376fbb9a8e146869772c8'>services: herd: Adjust to &lt;live-service&gt; changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to a2c759c8304c461d096ab763568e7f71546ff4e8.

* guix/scripts/system/reconfigure.scm (running-services): Fill in the
'transient?' field of &lt;live-service&gt;.
* tests/services.scm ("shepherd-service-upgrade: one unchanged, one upgraded, one new")
("shepherd-service-upgrade: service depended on is not unloaded")
("shepherd-service-upgrade: obsolete services that depend on each
other"): Adjust calls to 'live-service'.
</span></span></td><td>Ludovic Courtès</td></tr>