From fc14b849379ec0dd03784dbdb3bb862acd7e659b Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Tue, 28 May 2019 08:47:03 +0200
Subject: [PATCH] src/backup/fixed_index.rs: improve bound checks inside
 add_digest

---
 src/backup/fixed_index.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/backup/fixed_index.rs b/src/backup/fixed_index.rs
index 0e99af8d..8f664d7f 100644
--- a/src/backup/fixed_index.rs
+++ b/src/backup/fixed_index.rs
@@ -355,6 +355,10 @@ impl FixedIndexWriter {
 
     pub fn add_digest(&mut self, index: usize, digest: &[u8; 32]) -> Result<(), Error> {
 
+        if index >= self.index_length {
+            bail!("add digest failed - index out of range ({} >= {})", index, self.index_length);
+        }
+
         let index_pos = index*32;
         unsafe {
             let dst = self.index.add(index_pos);