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Bug#995223: libffi: SIGILL on powerpc and ppc64 systems since libffi8

Source: libffi
Version: 3.3-6
Severity: important
User: debian-powerpc@lists.debian.org
Usertags: powerpc ppc64
X-Debbugs-Cc: debian-powerpc@lists.debian.org


Multiple users on powerpc and ppc64 have reported SIGILL crashes
after upgrading to libffi8 (3.4.x):

# dmesg
[   16.257543] fail2ban-server[384]: illegal instruction (4) at
3fffb4283970 nip 3fffb4283970 lr 3fffb4282f90 code 1 in

Downgrading to libffi7 fixes the problem.

It has been reported that building and using the upstream version
does not reproduce this issue. But I have not yet independently
verified that. It might be that libffi performs a runtime detection
during build which causes the library to be built with a higher
baseline on the POWER8 buildds.


 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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