What does CHUNK_QUARANTINED mean?

[Will Lucas]

I'm new to using address sanitizer, and I've been trying to deal with what I think is a heap corruption issue. I keep getting ASan reports like below:

==43795==AddressSanitizer CHECK failed: ../../../../src/libsanitizer/asan/asan_allocator.cc:135 "((m->chunk_state)) == ((CHUNK_QUARANTINE))" (0x13, 0x3)

   #0 0x7f2961ca8bf2  (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xe9bf2)

   #1 0x7f2961cc7575 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x108575)

   #2 0x7f2961be9ab1  (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x2aab1)

   #3 0x7f2961bea443  (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x2b443)

   #4 0x7f2961c9d772 in __interceptor_free (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xde772)

   #5 0x7f295d76a718 in cv::Mat::deallocate() (/usr/local/lib/libopencv_core.so.3.4+0x18a718)

   #6 0x558a2adc8db7 in cv::Mat::release() /usr/local/include/opencv2/core/mat.inl.hpp:901

   #7 0x558a2adc8db7 in cv::Mat::~Mat() /usr/local/include/opencv2/core/mat.inl.hpp:787

I'm trying to understand what CHUNK_QUARANTINED means in order to determine next steps for debugging. Is there documentation on this type of failure, or has anyone dealt with these types of errors?

Thanks for your time!

Will

[Konstantin Serebryany]

Hi Will, 

CHUNK_QUARANTINED is an implementation detail. 

Normally, users are not expected to see any such reports. 

A CHECK failure like this are likely to happen when there is a memory corruption 

that ASAN doesn't detect and which corrupts ASAN's own internal state. 

Your report has /usr/local/lib/libopencv_core.so in it. 

Does it mean that you run uninstrumented libopencv? (or, you've installed an asan-instrumented lib into /usr/local?)

That may well explain the situation. 

You either hit a memory corruption bug in libopencv or you misuse libopencv causing it to corrupt memory on your behalf. 

The solution would be to use asan-instrumented variants for all important libraries in your process. 

hth, 

--kcc  

 

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[Will Lucas]

Thanks for the quick reply Konstantin! That's very helpful, I'll working rebuilding my dependencies with -fsanitizer=address to try to get better coverage!

Thanks again!

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