From c47451d12ba255d5967b851618713c009f102bbe Mon Sep 17 00:00:00 2001
From: Thomas Schmitt <scdbackup@gmx.net>
Date: Sat, 16 Aug 2014 15:01:11 +0200
Subject: [PATCH] Bug fix: iso_image_report_system_area() caused SIGSEGV by
 NULL if no valid ISO 9660 image was loeaded. Thanks to OmegaPhil.

---
 libisofs/fs_image.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libisofs/fs_image.c b/libisofs/fs_image.c
index 03ca60b..5984508 100644
--- a/libisofs/fs_image.c
+++ b/libisofs/fs_image.c
@@ -4798,6 +4798,8 @@ int iso_impsysa_report(IsoImage *image, struct iso_impsysa_result *target,
 
     LIBISO_ALLOC_MEM(msg, char, ISO_MAX_SYSAREA_LINE_LENGTH);
 
+    if (sai == NULL)
+        {ret = 0; goto ex;}
     if (!sai->is_not_zero)
         {ret = 0; goto ex;}
     sao = sai->system_area_options;