X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/ce1f3a2c616b86da657c1c796efa5f4d18c30c39..d04e44ac8177fc5b70ae0189bb5e437c2502f910:/apt-pkg/cachefile.cc

diff --git a/apt-pkg/cachefile.cc b/apt-pkg/cachefile.cc
index aaa2436c5..39f1e72db 100644
--- a/apt-pkg/cachefile.cc
+++ b/apt-pkg/cachefile.cc
@@ -80,6 +80,8 @@ bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock)
       if (file.IsOpen() == false || file.Failed())
 	 return false;
       Map = new MMap(file, MMap::Public|MMap::ReadOnly);
+      if (unlikely(Map->validData() == false))
+	 return false;
       Cache = new pkgCache(Map);
       return _error->PendingError() == false;
    }