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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-11-09 15:37:04 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-11-09 15:37:04 +0000 |
commit | fb40481030e52602cba45374400dc2bd1288ff7a (patch) | |
tree | f2e712e59a5123f54b0871dd1808883dc3c298ae /test/resolv/test_dns.rb | |
parent | cdb68f419e41a7142215e8c8ac64d6f68ae0de88 (diff) | |
download | ruby-fb40481030e52602cba45374400dc2bd1288ff7a.tar.gz |
* 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
Diffstat (limited to 'test/resolv/test_dns.rb')
-rw-r--r-- | test/resolv/test_dns.rb | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb index e7857248ce..9f993ba96a 100644 --- a/test/resolv/test_dns.rb +++ b/test/resolv/test_dns.rb @@ -197,4 +197,21 @@ class TestResolvDNS < Test::Unit::TestCase expected = (['0'] * 32 + ['ip6', 'arpa']).map {|label| Resolv::DNS::Label::Str.new(label) } assert_equal(expected, labels) end + + def test_too_big_label_address + n = 2000 + m = Resolv::DNS::Message::MessageEncoder.new {|msg| + 2.times { + n.times {|i| msg.put_labels(["foo#{i}"]) } + } + } + Resolv::DNS::Message::MessageDecoder.new(m.to_s) {|msg| + 2.times { + n.times {|i| + assert_equal(["foo#{i}"], msg.get_labels.map {|label| label.to_s }) + } + } + } + assert_operator(2**14, :<, m.to_s.length) + end end |