Fixed possible segv if there are no packages

[apt.git] / apt-pkg / pkgcachegen.cc

diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index 026f795eb9679fbe55216d2cc92d1a5a3614a1a6..534217e9e0945b847c788f476b55be6d18e49667 100644 (file)
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: pkgcachegen.cc,v 1.49 2001/05/27 05:55:27 jgg Exp $
+// $Id: pkgcachegen.cc,v 1.50 2001/07/01 22:28:24 jgg Exp $
 /* ######################################################################
    
    Package Cache Generator - Generator for the cache structure.
@@ -192,6 +192,15 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
       }      
    }
 
+   if (Cache.HeaderP->PackageCount >= (1ULL<<sizeof(Cache.PkgP->ID)*8)-1)
+      return _error->Error(_("Wow, you exceeded the number of package "
+                            "names this APT is capable of."));
+   if (Cache.HeaderP->VersionCount >= (1ULL<<(sizeof(Cache.VerP->ID)*8))-1)
+      return _error->Error(_("Wow, you exceeded the number of versions "
+                            "this APT is capable of."));
+   if (Cache.HeaderP->DependsCount >= (1ULL<<(sizeof(Cache.DepP->ID)*8))-1ULL)
+      return _error->Error(_("Wow, you exceeded the number of dependencies "
+                            "this APT is capable of."));
    return true;
 }
                                                                        /*}}}*/