Potential memory overrun in test_ldpc

[asedlmayr]

Zc = 112, {encoding, decoding}: {58.45, 24.36} Mbps, {42.15, 101.16} us per code block. Bit errors = 0, BER = 0.000
Zc = 120, {encoding, decoding}: {61.33, 21.26} Mbps, {43.04, 124.18} us per code block. Bit errors = 0, BER = 0.000

==50457==ERROR: AddressSanitizer: unknown-crash on address 0x7ffceebe3e6f at pc 0x00000061ae9d bp 0x7ffceebe3b70 sp 0x7ffceebe3b60
READ of size 32 at 0x7ffceebe3e6f thread T0
#0 0x61ae9c in _mm256_loadu_si256(long long __vector(4) const*) /usr/lib/gcc/x86_64-linux-gnu/9/include/avxintrin.h:922
#1 0x61ae9c in avx2enc::cycle_bit_shift_72to128(long long __vector(4), short, short) /home/rice/Documents/Development/Repos/agora_updown/src/encoder/cyclic_shift.cpp:69
#2 0x61cc0d in avx2enc::ldpc_encoder_bg1(signed char*, signed char*, short const*, short const*, short const*, short, unsigned char) /home/rice/Documents/Development/Repos/agora_updown/src/encoder/encoder.cpp:32
#3 0x62125a in avx2enc::bblib_ldpc_encoder_5gnr(bblib_ldpc_encoder_5gnr_request*, bblib_ldpc_encoder_5gnr_response*) /home/rice/Documents/Development/Repos/agora_updown/src/encoder/encoder.cpp:286
#4 0x482f33 in ldpc_encode_helper /home/rice/Documents/Development/Repos/agora_updown/src/common/utils_ldpc.hpp:226
#5 0x48478b in main /home/rice/Documents/Development/Repos/agora_updown/test/compute_kernels/ldpc/test_ldpc.cpp:75
#6 0x7f962e8cb0b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
#7 0x480e4d in _start (/home/rice/Documents/Development/Repos/agora_updown/build/test_ldpc+0x480e4d)

Address 0x7ffceebe3e6f is located in stack of thread T0 at offset 399 in frame
#0 0x61a65f in avx2enc::cycle_bit_shift_72to128(long long __vector(4), short, short) /home/rice/Documents/Development/Repos/agora_updown/src/encoder/cyclic_shift.cpp:37

This frame has 3 object(s):
[32, 64) 'x0' (line 58)
[96, 128) 'x2' (line 58)
[160, 416) 'shuffle_table' (line 39) <== Memory access at offset 399 partially overflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism, swapcontext or vfork
(longjmp and C++ exceptions are supported)
SUMMARY: AddressSanitizer: unknown-crash /usr/lib/gcc/x86_64-linux-gnu/9/include/avxintrin.h:922 in _mm256_loadu_si256(long long __vector(4) const*)
Shadow bytes around the buggy address:
0x10001dd74770: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001dd74780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001dd74790: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x10001dd747a0: 00 00 00 00 f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2
0x10001dd747b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10001dd747c0: 00 00 00 00 00 00 00 00 00 00 00 00 00[00]00 00
0x10001dd747d0: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
0x10001dd747e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001dd747f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001dd74800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001dd74810: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==50457==ABORTING

[asedlmayr]

Fixed in commit a03ffb4