Created attachment 1507968 [details]
./libxsmm_gemm_generator sparse b a 10 10 10 1 1 1 1 1 1 0 wsm nopf SP POC0

version: libxsmm release-1.10
summary: 

There is a  heap-buffer-overflow in libxsmm_sparse_csc_reader  at src/generator_spgemm_csc_reader.c:174 (malloc at src/generator_spgemm_csc_reader.c:122) in libxsmm.

Description:

The asan debug is as follows:

$./libxsmm_gemm_generator sparse b a 10 10 10 1 1 1 1 1 1 0 wsm nopf SP POC0 

=================================================================
==51909==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000eff0 at pc 0x000000444875 bp 0x7ffc367e8ec0 sp 0x7ffc367e8eb0
WRITE of size 4 at 0x60200000eff0 thread T0
    #0 0x444874 in libxsmm_sparse_csc_reader src/generator_spgemm_csc_reader.c:174
    #1 0x405751 in libxsmm_generator_spgemm src/generator_spgemm.c:279
    #2 0x40225a in main src/libxsmm_generator_gemm_driver.c:318
    #3 0x7f73105a0a3f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x20a3f)
    #4 0x402ea8 in _start (/home/company/real_sanitize/poc_check/libxsmm/libxsmm_gemm_generator_asan+0x402ea8)

0x60200000eff1 is located 0 bytes to the right of 1-byte region [0x60200000eff0,0x60200000eff1)
allocated by thread T0 here:
    #0 0x7f7310c009aa in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x989aa)
    #1 0x443f78 in libxsmm_sparse_csc_reader src/generator_spgemm_csc_reader.c:122
    #2 0x7ffc367e92bf  (<unknown module>)
    #3 0x439  (<unknown module>)

SUMMARY: AddressSanitizer: heap-buffer-overflow src/generator_spgemm_csc_reader.c:174 libxsmm_sparse_csc_reader
Shadow bytes around the buggy address:
  0x0c047fff9da0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9db0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9dc0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9dd0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c047fff9df0: fa fa 01 fa fa fa 01 fa fa fa 04 fa fa fa[01]fa
  0x0c047fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c047fff9e40: 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
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
==51909==ABORTING