* lib/resolv.rb (Resolv::DNS::Message::MessageEncoder#put_labels):

  Prevent overflow of pointer to labels.
  Patch by Hannes Georg.  [ruby-core:71248] [Bug #11632]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52508 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/resolv.rb b/lib/resolv.rb
index a5eb9fe55f..17c832037f 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -1477,7 +1477,9 @@ class Resolv
               self.put_pack("n", 0xc000 | idx)
               return
             else
-              @names[domain] = @data.length
+              if @data.length < 0x4000
+                @names[domain] = @data.length
+              end
               self.put_label(d[i])
             end
           }