From: Sergey Poznyakoff <gray@gnu.org>
Date: Fri, 21 Dec 2018 05:32:47 +0000 (+0200)
Subject: Reject pax options starting with equals sign
X-Git-Tag: release_1_31~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99d415e1902c2309a4a3da41b2f08e5719771336;p=thirdparty%2Ftar.git

Reject pax options starting with equals sign

Bug reported in
  http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00010.html

* xheader.c (xheader_set_keyword_equal): Bail out if the keyword starts
with =
---

diff --git a/src/xheader.c b/src/xheader.c
index 980f0504..e9385022 100644
--- a/src/xheader.c
+++ b/src/xheader.c
@@ -185,6 +185,9 @@ xheader_set_keyword_equal (char *kw, char *eq)
   bool global = true;
   char *p = eq;
 
+  if (eq == kw)
+    USAGE_ERROR ((0, 0, _("Malformed pax option: %s"), quote (kw)));
+    
   if (eq[-1] == ':')
     {
       p--;