From 44e86304b611a955f4e934fc160f3f4a0a2b1c92 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 26 Sep 2018 12:03:58 +0200
Subject: Make NAR header check more robust

Changes

  std::bad_alloc

into

  bad archive: input doesn't look like a Nix archive
---
 src/libutil/archive.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/libutil/archive.cc')

diff --git a/src/libutil/archive.cc b/src/libutil/archive.cc
index 1be8934a2..bb68e8288 100644
--- a/src/libutil/archive.cc
+++ b/src/libutil/archive.cc
@@ -283,7 +283,7 @@ void parseDump(ParseSink & sink, Source & source)
 {
     string version;
     try {
-        version = readString(source);
+        version = readString(source, narVersionMagic1.size());
     } catch (SerialisationError & e) {
         /* This generally means the integer at the start couldn't be
            decoded.  Ignore and throw the exception below. */
-- 
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