stack smashing detected in /usr/lib/plan9/bin/sha1sum on s390x

[Balint Reczey]

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-groovy/groovy/s390x/9/9base/20200911_155624_b40fb@/log.gz

...
autopkgtest [15:54:42]: test command14: RP=/usr/lib/plan9/bin; $RP/fortune debian/tests/lorem.txt | $RP/sha1sum
autopkgtest [15:54:42]: test command14: [-----------------------
*** stack smashing detected ***: terminated
bash: line 1: 4576 Done $RP/fortune debian/tests/lorem.txt
      4577 Aborted (core dumped) | $RP/sha1sum
autopkgtest [15:54:43]: test command14: -----------------------]
autopkgtest [15:54:44]: test command14: - - - - - - - - - - results - - - - - - - - - -
command14 FAIL non-zero exit status 134
...

It is not consistently reproducible since the test uses fortune, but on 5.4.0-14-generic kernel in a 20.10 lxc container it is:

root@gg-9base:~/9base-6# echo "foo bar" | valgrind /usr/lib/plan9/bin/sha1sum
==26505== Memcheck, a memory error detector
==26505== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==26505== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==26505== Command: /usr/lib/plan9/bin/sha1sum
==26505==
*** stack smashing detected ***: terminated
==26505==
==26505== Process terminating with default action of signal 6 (SIGABRT)
==26505== at 0x4937806: raise (raise.c:49)
==26505== by 0x4916A57: abort (abort.c:79)
==26505== by 0x497EB6D: __libc_message (libc_fatal.c:155)
==26505== by 0x4A21993: __fortify_fail (fortify_fail.c:26)
==26505== by 0x4A21967: __stack_chk_fail (stack_chk_fail.c:24)
==26505== by 0x109A77: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x10C9A5: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x10A34D: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x10CF4B: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x10CE31: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x109B71: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505== by 0x109D05: ??? (in /usr/lib/plan9/bin/sha1sum)
==26505==
==26505== HEAP SUMMARY:
==26505== in use at exit: 0 bytes in 0 blocks
==26505== total heap usage: 1 allocs, 1 frees, 168 bytes allocated
==26505==
==26505== All heap blocks were freed -- no leaks are possible
==26505==
==26505== For lists of detected and suppressed errors, rerun with: -s
==26505== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
Aborted (core dumped)
root@gg-9base:~/9base-6# uname -a
Linux gg-9base 5.4.0-14-generic #17-Ubuntu SMP Thu Feb 6 22:46:43 UTC 2020 s390x s390x s390x GNU/Linux

[Jochen Sprickerhof (v-launchpad-jochen-sprickerhof-de)]

Fixed in version 1:6-11