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  1. Kudu
  2. KUDU-851

ubsan failure in schema-test: runtime error: reference binding to null pointer

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: Feature Complete
    • Fix Version/s: 0.7.0
    • Component/s: tablet
    • Labels:
      None

      Description

      Seeing an UBSAN failure on Ubuntu 14.04 with clang 3.6.0:

      $ ./build/latest/schema-test
      [==========] Running 12 tests from 2 test cases.
      [----------] Global test environment set-up.
      [----------] 11 tests from TestSchema
      [ RUN      ] TestSchema.TestSchema
      /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_iterator.h:739:16: runtime error: reference binding to null pointer of type 'const kudu::ColumnSchema'
      SUMMARY: AddressSanitizer: undefined-behavior /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_iterator.h:739 
      mpercy@mpercy-ThinkPad-T530:~/src/kudu$ clang++ --version
      clang version 3.6.0 (tags/RELEASE_360/final)
      Target: x86_64-unknown-linux-gnu
      Thread model: posix
      
      $ /usr/bin/gdb --args ./build/latest/schema-test --gtest_break_on_failure
      (gdb) b __ubsan::Diag::~Diag
      Breakpoint 1 at 0x524bb1: file /home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_diag.cc, line 319.
      (gdb) r
      Starting program: /home/mpercy/src/kudu/build/fastdebug/schema-test --gtest_break_on_failure
      [Thread debugging using libthread_db enabled]
      Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
      [New Thread 0x7ffff2642880 (LWP 1120)]
      [==========] Running 12 tests from 2 test cases.
      [----------] Global test environment set-up.
      [----------] 11 tests from TestSchema
      [ RUN      ] TestSchema.TestSchema
      
      Breakpoint 1, ~Diag () at /home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_diag.cc:319
      319	/home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_diag.cc: No such file or directory.
      
      (gdb) bt
      #0  ~Diag () at /home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_diag.cc:319
      #1  0x0000000000525f71 in handleTypeMismatchImpl () at /home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_handlers.cc:64
      #2  0x000000000052600d in __ubsan_handle_type_mismatch_abort () at /home/development/llvm/3.6.0/final/llvm.src/projects/compiler-rt/lib/ubsan/ubsan_handlers.cc:75
      #3  0x00007ffff7b7b7cc in __gnu_cxx::__normal_iterator<kudu::ColumnSchema const*, std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> > >::operator* (this=<optimized out>)
          at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_iterator.h:739
      #4  0x00007ffff7b7b6fe in std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> >::front (this=<optimized out>) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_vector.h:848
      #5  0x00007ffff7b757a2 in std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> >::data (this=0x7fffffffcc00) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_vector.h:887
      #6  0x00007ffff7b6f3c3 in kudu::Schema::memory_footprint_excluding_this (this=0x7fffffffcc00) at src/kudu/common/schema.cc:337
      #7  0x000000000052a33d in kudu::tablet::TestSchema_TestSchema_Test::TestBody (this=<optimized out>) at src/kudu/common/schema-test.cc:48
      #8  0x00007ffff6283219 in HandleSehExceptionsInMethodIfSupported<testing::Test, void> (location=0x7ffff6298d4c "the test body", method=<optimized out>, object=<optimized out>) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2078
      #9  testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void> (object=object@entry=0x60200000a690, method=<optimized out>, location=location@entry=0x7ffff6298d4c "the test body")
          at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2114
      #10 0x00007ffff6274cff in testing::Test::Run (this=this@entry=0x60200000a690) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2151
      #11 0x00007ffff6274dbd in testing::TestInfo::Run (this=0x60f00000ee60) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2326
      #12 0x00007ffff6274ed5 in testing::TestCase::Run (this=0x6110000098c0) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2444
      #13 0x00007ffff6275188 in testing::internal::UnitTestImpl::RunAllTests (this=0x61500000fa80) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:4315
      #14 0x00007ffff6275429 in HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> (location=<optimized out>, method=<optimized out>, object=<optimized out>) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2078
      #15 HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool> (location=0x7ffff629a650 "auxiliary test code (environments or event listeners)", 
          method=(bool (testing::internal::UnitTestImpl::*)(testing::internal::UnitTestImpl * const)) 0x7ffff6274f40 <testing::internal::UnitTestImpl::RunAllTests()>, object=0x61500000fa80) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:2114
      #16 testing::UnitTest::Run (this=<optimized out>) at /home/mpercy/src/kudu/thirdparty/gmock-1.7.0/gtest/src/gtest.cc:3929
      #17 0x00007ffff7fef508 in main (argc=<optimized out>, argv=<optimized out>) at src/kudu/util/test_main.cc:37
      #18 0x00007ffff5051ec5 in __libc_start_main (main=0x47c560 <main@plt>, argc=2, argv=0x7fffffffdb18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffdb08) at libc-start.c:287
      #19 0x000000000047d5be in _start ()
      
      (gdb) f 5
      #5  0x00007ffff7b757a2 in std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> >::data (this=0x7fffffffcc00) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_vector.h:887
      887	      { return std::__addressof(front()); }
      
      (gdb) list
      883	#else
      884	      const_pointer
      885	#endif
      886	      data() const _GLIBCXX_NOEXCEPT
      887	      { return std::__addressof(front()); }
      
      (gdb) f 4
      #4  0x00007ffff7b7b6fe in std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> >::front (this=<optimized out>) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_vector.h:848
      848	      { return *begin(); }
      
      (gdb) list
      846	      const_reference
      847	      front() const
      848	      { return *begin(); }
      
      (gdb) f 3
      #3  0x00007ffff7b7b7cc in __gnu_cxx::__normal_iterator<kudu::ColumnSchema const*, std::vector<kudu::ColumnSchema, std::allocator<kudu::ColumnSchema> > >::operator* (this=<optimized out>)
          at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/stl_iterator.h:739
      
      (gdb) list
      736	      // Forward iterator requirements
      737	      reference
      738	      operator*() const
      739	      { return *_M_current; }
      
      (gdb) p _M_current 
      $1 = (const kudu::ColumnSchema *) 0x0
      

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            • Assignee:
              tlipcon Todd Lipcon
              Reporter:
              mpercy Mike Percy
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              • Created:
                Updated:
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