From: Josef Möllers <josef.moellers@suse.com>
Date: Mon, 26 Mar 2018 10:27:34 +0000 (+0200)
Subject: zzip_mem_entry_new(): if compressed size is too big, bail out.
X-Git-Tag: v0.13.70~21^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4393a756cea723e6d4b2fa70310f64a2e1303f94;p=zziplib

zzip_mem_entry_new(): if compressed size is too big, bail out.
---

diff --git a/zzip/memdisk.c b/zzip/memdisk.c
index 8d5743d..7c59602 100644
--- a/zzip/memdisk.c
+++ b/zzip/memdisk.c
@@ -222,6 +222,14 @@ zzip_mem_entry_new(ZZIP_DISK * disk, ZZIP_DISK_ENTRY * entry)
     item->zz_filetype = zzip_disk_entry_get_filetype(entry);
 
     /*
+     * If zz_data+zz_csize exceeds the size of the file, bail out
+     */
+    if ((item->zz_data + item->zz_csize) < disk->buffer ||
+	(item->zz_data + item->zz_csize) >= disk->endbuf)
+    {
+	goto error;
+    }
+   /*
      * If the file is uncompressed, zz_csize and zz_usize should be the same
      * If they are not, we cannot guarantee that either is correct, so ...
      */