This was posted by @grothoff on gcrypt-devel in 2018 and materialized again at their tracker yesterday.
It is likely that we forgot about this given that there was no followup on the ML.
(https://lists.gnupg.org/pipermail/gcrypt-devel/2018-August/004534.html)//
libgcrypt from git master causes an assertion on my AMD 1950X when
running GNUnet's src/util/test_crypto_ecc_dlog logic:
.Ohhhh jeeee: mulm_25519: different sizes FAIL test_crypto_ecc_dlog (exit status: 134) With GDB: .Ohhhh jeeee: mulm_25519: different sizes Program received signal SIGABRT, Aborted. __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) ba #0 __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51 #1 0x00007ffff7b242f1 in __GI_abort () at abort.c:79 #2 0x00007ffff7e8e587 in _gcry_logv (level=50, fmt=0x7ffff7f2c4a4 "mulm_25519: different sizes\n", arg_ptr=0x7fffffffdd18) at misc.c:142 #3 0x00007ffff7e8e94d in _gcry_log_bug (fmt=0x7ffff7f2c4a4 "mulm_25519: different sizes\n") at misc.c:229 #4 0x00007ffff7f157b1 in ec_mulm_25519 (w=0x55555555a1f0, u=0x55555555b6d0, v=0x55555555b630, ctx=0x55555555a010) at ec.c:431 #5 0x00007ffff7f1760d in add_points_edwards (result=0x55555555b8a0, p1=0x55555555b670, p2=0x55555555b750, ctx=0x55555555a010) at ec.c:1305 #6 0x00007ffff7f17cc7 in _gcry_mpi_ec_add_points (result=0x55555555b8a0, p1=0x55555555b670, p2=0x55555555b750, ctx=0x55555555a010) at ec.c:1416 #7 0x00007ffff7e8c659 in gcry_mpi_ec_add (w=0x55555555b8a0, u=0x55555555b670, v=0x55555555b750, ctx=0x55555555a000) at visibility.c:580 #8 0x00007ffff7f70fd9 in GNUNET_CRYPTO_ecc_dlog (edc=0x555555559bd0, input=0x55555555b670) at crypto_ecc_dlog.c:259 #9 0x0000555555555580 in test_dlog (edc=0x555555559bd0) at test_crypto_ecc_dlog.c:99 #10 0x0000555555555972 in main (argc=1, argv=0x7fffffffe138) at test_crypto_ecc_dlog.c:186
Note that on the same system using Debian's 1.8.3-1 package things work,
so either it is the build or a regression.
I used:
./configure --prefix=/home/grothoff --with-libgpg-error-prefix=/home/grothoff --enable-ciphers="blowfish aes twofish" --enable-digests="crc md5 sha1 sha256 sha512" --enable-kdfs=scrypt CFLAGS=-g -O0 -Wall