From ebcb61e3d88d99b929b4d8ccaad837a871c102d8 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 30 Oct 2014 13:50:39 +0000
Subject: [PATCH 05/12] handle: Refuse to open files < 8192 bytes in size.

These cannot be valid hives, since they don't contain a full header
page and at least a single page of data (in other words they couldn't
contain a root node).

Thanks: Mahmoud Al-Qudsi
(cherry picked from commit 357f26fa64fd1d9ccac2331fe174a8ee9c607adb)
---
 lib/handle.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/handle.c b/lib/handle.c
index 62a8644..a3cbcf7 100644
--- a/lib/handle.c
+++ b/lib/handle.c
@@ -104,6 +104,13 @@ hivex_open (const char *filename, int flags)
 
   h->size = statbuf.st_size;
 
+  if (h->size < 0x2000) {
+    SET_ERRNO (EINVAL,
+               "%s: file is too small to be a Windows NT Registry hive file",
+               filename);
+    goto error;
+  }
+
   if (!h->writable) {
     h->addr = mmap (NULL, h->size, PROT_READ, MAP_SHARED, h->fd, 0);
     if (h->addr == MAP_FAILED)
-- 
1.8.3.1