[issue44363] Likely false positive for address sanitizer after fork

[Pablo Galindo Salgado]

Pablo Galindo Salgado <pablogsal at gmail.com> added the comment:

Also, I can reproduce locally without any fork whatsoever:

./python -m test test_lib2to3

SUMMARY: AddressSanitizer: heap-buffer-overflow Python/ceval.c:3549 in _PyEval_EvalFrameDefault
Shadow bytes around the buggy address:
  0x0c1c8003ec40: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c1c8003ec50: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
  0x0c1c8003ec60: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1c8003ec70: 00 00 00 00 00 00 00 00 fa fa fa fa fa fa fa fa
  0x0c1c8003ec80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c1c8003ec90: 00 00 00 00 fa[fa]fa fa fa fa fa fa fd fd fd fd
  0x0c1c8003eca0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa
  0x0c1c8003ecb0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x0c1c8003ecc0: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
  0x0c1c8003ecd0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c1c8003ece0: 00 00 00 00 00 00 00 00 fa fa 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
  Shadow gap:              cc
==14183==ABORTING

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<https://bugs.python.org/issue44363>
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