From 1186c36c44ca581fd4819f59d1823d3f2ec17164 Mon Sep 17 00:00:00 2001
From: "Brian C. Lane" <bcl@brianlane.com>
Date: Wed, 8 Aug 2018 13:06:58 -0700
Subject: [PATCH] Fix SIGSEGV in  reformime (#1613761)

Check for NULL section when running strtok on it for decode and
do_extract handling.
---
 libs/rfc2045/reformime.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/libs/rfc2045/reformime.c b/libs/rfc2045/reformime.c
index 9851c65..49a0ebd 100644
--- a/libs/rfc2045/reformime.c
+++ b/libs/rfc2045/reformime.c
@@ -1164,10 +1164,11 @@ int rc=0;
 	}
 	else if (dodecode)
 	{
-		mimesection = strtok(section,",");
+		mimesection = section ? strtok(section, ","):NULL;
 		do {
 			print_decode(p, mimesection);
-			mimesection = strtok(NULL,",");
+			if (mimesection)
+				mimesection = strtok(NULL,",");
 		} while (mimesection != NULL);
 	}
 	else if (dorewrite)
@@ -1176,11 +1177,12 @@ int rc=0;
 		dsn(p, dodsn == 2);
 	else if (do_extract)
 	{
-		mimesection = strtok(section,",");
+		mimesection = section ? strtok(section, ","):NULL;
 		do {
 			extract_section(p, mimesection, extract_filename,
 					argc-argn, argv+argn, do_extract);
-			mimesection = strtok(NULL,",");
+			if (mimesection)
+				mimesection = strtok(NULL,",");
 		} while (mimesection != NULL);
 	}
 	else if (dovalidate)
-- 
2.17.1