ASAN heap-buffer-overflow in test_concurrently / unittests

perl ./mtr unit.lf

perl ./mtr unit.my_atomic

==4351==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x611000009ff0 at pc 0x55f58b75c604 bp 0x7ffdae33e240 sp 0x7ffdae33e238

READ of size 8 at 0x611000009ff0 thread T0

    #0 0x55f58b75c603 in test_concurrently /data/src/10.3-bug/unittest/mysys/thr_template.c:47

    #1 0x55f58b75d22a in do_tests /data/src/10.3-bug/unittest/mysys/lf-t.c:187

    #2 0x55f58b75c80f in main /data/src/10.3-bug/unittest/mysys/thr_template.c:68

    #3 0x7efe4c9412b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

    #4 0x55f58b75c3d9 in _start (/data/src/10.3-bug/unittest/mysys/lf-t+0x523d9)

0x611000009ff0 is located 0 bytes to the right of 240-byte region [0x611000009f00,0x611000009ff0)

allocated by thread T0 here:

    #0 0x7efe4e24873f in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.1+0x5473f)

    #1 0x55f58b75c506 in test_concurrently /data/src/10.3-bug/unittest/mysys/thr_template.c:29

    #2 0x55f58b75d22a in do_tests /data/src/10.3-bug/unittest/mysys/lf-t.c:187

    #3 0x55f58b75c80f in main /data/src/10.3-bug/unittest/mysys/thr_template.c:68

    #4 0x7efe4c9412b0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)

SUMMARY: AddressSanitizer: heap-buffer-overflow /data/src/10.3-bug/unittest/mysys/thr_template.c:47 test_concurrently

Shadow bytes around the buggy address:

  0x0c227fff93a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff93b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff93c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff93d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff93e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

=>0x0c227fff93f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa

  0x0c227fff9400: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9410: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9420: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9430: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

  0x0c227fff9440: fa fa fa fa fa fa fa fa 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

  Heap right redzone:      fb

  Freed heap region:       fd

  Stack left redzone:      f1

  Stack mid redzone:       f2

  Stack right redzone:     f3

  Stack partial redzone:   f4

  Stack after return:      f5

  Stack use after scope:   f8

  Global redzone:          f9

  Global init order:       f6

  Poisoned by user:        f7

  Contiguous container OOB:fc

  ASan internal:           fe

==4351==ABORTING