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==23073==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x602000000208 at pc 0x7f4a8bfd021a bp 0x7fffebda4010 sp 0x7fffebda4000

READ of size 8 at 0x602000000208 thread T0

#0 0x7f4a8bfd0219 in _gcry_mpi_tdiv_qr /libgcrypt/mpi/mpi-div.c:209

#1 0x7f4a8bfd383f in _gcry_mpi_fdiv_qr /libgcrypt/mpi/mpi-div.c:104

#2 0x7f4a8bfd383f in _gcry_mpi_fdiv_q /libgcrypt/mpi/mpi-div.c:89

#3 0x7f4a8bfd383f in _gcry_mpi_div /libgcrypt/mpi/mpi-div.c:349

#4 0x55a85dcb2e05 in compute_missing /libgcrypt/tests/rsacvt.c:226

#5 0x55a85dcb2e05 in main /libgcrypt/tests/rsacvt.c:388

#6 0x7f4a8b598b96 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

#7 0x55a85dcb38c9 in _start (/libgcrypt/tests/rsacvt+0x48c9)

0x602000000208 is located 8 bytes to the left of 8-byte region [0x602000000210,0x602000000218)

allocated by thread T0 here:

#0 0x7f4a8c1b1b50 in __interceptor_malloc (/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb50)

#1 0x7f4a8bbe79a4 in do_malloc /libgcrypt/src/global.c:920

#2 0x7f4a8bbe79a4 in _gcry_malloc /libgcrypt/src/global.c:942

#3 0x7f4a8bbe79a4 in _gcry_xmalloc /libgcrypt/src/global.c:1116

#4 0x7f4a8bbe79a4 in _gcry_xcalloc /libgcrypt/src/global.c:1178

SUMMARY: AddressSanitizer: heap-buffer-overflow /libgcrypt/mpi/mpi-div.c:209 in _gcry_mpi_tdiv_qr

Shadow bytes around the buggy address:

0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

0x0c047fff8000: fa fa 00 fa fa fa 00 fa fa fa 00 fa fa fa 00 fa

0x0c047fff8010: fa fa 00 fa fa fa 00 fa fa fa fd fa fa fa 00 fa

0x0c047fff8020: fa fa fd fa fa fa 00 fa fa fa fd fa fa fa 00 fa

0x0c047fff8030: fa fa 00 00 fa fa 00 00 fa fa 00 00 fa fa fd fa

=>0x0c047fff8040: fa[fa]00 fa fa fa 00 fa fa fa 00 fa fa fa fa fa

0x0c047fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c047fff8060: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c047fff8070: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c047fff8080: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa

0x0c047fff8090: 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

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

==23073==ABORTING