OOB: cv::WorkerThread::WorkerThread()

[RootUp]

Build type: Release
OpenCV version: 4.1.2-pre
OS: Linux 4.15.0-62-generic #69-Ubuntu
OpenCV VCS version: 4.1.1-217-g4de115c08

I've complied opencv with clang enabling ASAN while fuzzing the opencv_test_video binary crashes at cv::hal_baseline::v_load() and cv::computeSSDMeanNorm()

==14389==ERROR: AddressSanitizer: unknown-crash on address 0x61500000c9c4 at pc 0x7f24d2ff6a40 bp 0x7f24aa6c4ac0 sp 0x7f24aa6c4ab0
READ of size 16 at 0x61500000c9c4 thread T7
    #0 0x7f24d2ff6a3f in _mm_loadu_si128(long long __vector(2) const*) /usr/lib/gcc/x86_64-linux-gnu/7/include/emmintrin.h:703
    #1 0x7f24d2ff6a3f in cv::hal_baseline::v_load(unsigned char const*) /home/input0/opencv/modules/core/include/opencv2/core/hal/intrin_sse.hpp:1348
    #2 0x7f24d2ff6a3f in cv::computeSSDMeanNorm(unsigned char*, unsigned char*, int, int, float, float, float, float, int) /home/input0/opencv/modules/video/src/dis_flow.cpp:738
    #3 0x7f24d2ff927f in cv::DISOpticalFlowImpl::PatchInverseSearch_ParBody::operator()(cv::Range const&) const /home/input0/opencv/modules/video/src/dis_flow.cpp:887
    #4 0x7f24cc0d860e in operator() /home/input0/opencv/modules/core/src/parallel.cpp:323
    #5 0x7f24cc0de621 in cv::ParallelJob::execute(bool) /home/input0/opencv/modules/core/src/parallel_impl.cpp:315
    #6 0x7f24cc0f3dd5 in cv::WorkerThread::thread_body() /home/input0/opencv/modules/core/src/parallel_impl.cpp:415
    #7 0x7f24cc0f5660 in cv::WorkerThread::thread_loop_wrapper(void*) /home/input0/opencv/modules/core/src/parallel_impl.cpp:265
    #8 0x7f24d2a8c6da in start_thread (/lib/x86_64-linux-gnu/libpthread.so.0+0x76da)
    #9 0x7f24ca52e88e in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x12188e)

0x61500000c9d0 is located 0 bytes to the right of 400-byte region [0x61500000c840,0x61500000c9d0)
allocated by thread T0 here:
    #0 0x7f24d35127a0 in posix_memalign (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdf7a0)
    #1 0x7f24cb2ffdc0 in cv::fastMalloc(unsigned long) /home/input0/opencv/modules/core/src/alloc.cpp:93

Thread T7 created by T0 here:
    #0 0x7f24d346ad2f in __interceptor_pthread_create (/usr/lib/x86_64-linux-gnu/libasan.so.4+0x37d2f)
    #1 0x7f24cc0e9aa3 in cv::WorkerThread::WorkerThread(cv::ThreadPool&, unsigned int) /home/input0/opencv/modules/core/src/parallel_impl.cpp:227
    #2 0x7fffb7dfd58f  (<unknown module>)

SUMMARY: AddressSanitizer: unknown-crash /usr/lib/gcc/x86_64-linux-gnu/7/include/emmintrin.h:703 in _mm_loadu_si128(long long __vector(2) const*)
Shadow bytes around the buggy address:
  0x0c2a7fff98e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2a7fff98f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fa
  0x0c2a7fff9900: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c2a7fff9910: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2a7fff9920: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c2a7fff9930: 00 00 00 00 00 00 00 00[00]00 fa fa fa fa fa fa
  0x0c2a7fff9940: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c2a7fff9950: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c2a7fff9960: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2a7fff9970: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c2a7fff9980: 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==14389==

[mshabunin]

https://nvd.nist.gov/vuln/detail/CVE-2019-16249

[alalek]

fuzzing the opencv_test_video

There is no fuzzing in regular OpenCV tests, so there is no special reproducer input data.

Only address sanitizer is working.
One of failed test is:

• DenseOpticalFlow_DIS.InvalidImgSize_CoarsestLevelLessThanFinestLevel