Auth SEGV on sparc64, alignment problem?

[Chris Ross]

  Apologies first for using two addresses, but I can’t currently read my email at distal.com.  :-)

  I was previously running dovecot2-2.2.29.1_2 on FreeBSD 11 on sparc64.  Trying to debug a problem I was having with one of my clients, I upgraded to dovecot-2.2.33.2_4 on that same server.  However, I cannot connect now, log shows:

Feb 20 16:55:00 westeros dovecot: master: Dovecot v2.2.33.2 (d6601f4ec) starting up for imap, pop3, lmtp
Feb 20 16:55:31 westeros dovecot: auth: Fatal: master: service(auth): child 25395 killed with signal 11 (core dumped)
Feb 20 16:55:31 westeros dovecot: master: Error: service(auth): command startup failed, throttling for 2 secs
Feb 20 16:55:31 westeros dovecot: imap-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 0 secs): user=<>, rip=2001::xxx, lip=2001:470:e24c:200::ae25, TLS handshaking, session=<ASDFSAFSADFSAD>
Feb 20 16:55:33 westeros dovecot: auth: Fatal: master: service(auth): child 25398 killed with signal 11 (core dumped)
Feb 20 16:55:33 westeros dovecot: master: Error: service(auth): command startup failed, throttling for 4 secs
Feb 20 16:55:33 westeros dovecot: imap-login: Disconnected: Auth process broken (disconnected before auth was ready, waited 2 secs): user=<>, rip=2001::xxx, lip=2001:470:e24c:200::ae25, session=<d46tyesdy5dsyd>
Feb 20 16:55:37 westeros dovecot: master: Error: service(auth): command startup failed, throttling for 8 secs
Feb 20 16:55:37 westeros dovecot: auth: Fatal: master: service(auth): child 25400 killed with signal 11 (core dumped)

  Loading the core file, as described https://www.dovecot.org/bugreport.html , shows the error in libc somewhere:

(gdb) bt full
#0  __unaligned_load (
    p=0x617070656e640e6d <Address 0x617070656e640e6d out of bounds>, size=4)
    at /usr/src/release-11.1.0/lib/libc/sparc64/sys/__sparc_utrap_align.c:45
	val = 0
	i = 0
#1  0x00000000109f9f6c in __unaligned_fixup (uf=0x7fdffffee40)
    at /usr/src/release-11.1.0/lib/libc/sparc64/sys/__sparc_utrap_align.c:78
	addr = <value optimized out>
	val = <value optimized out>
	insn = 3254807616
	sig = <value optimized out>
#2  0x00000000109f9d50 in __sparc_utrap (uf=0x7fdffffee40)
    at /usr/src/release-11.1.0/lib/libc/sparc64/sys/__sparc_utrap.c:100
	sig = 272013984
#3  0x000000001094a10c in __sparc_utrap_gen () from /lib/libc.so.7
No symbol table info available.
#4  0x000000001094a10c in __sparc_utrap_gen () from /lib/libc.so.7
No symbol table info available.
Previous frame identical to this frame (corrupt stack?)
(gdb) 

  As this is a sparc64, with 8-byte alignment requirements, I’m guessing that’s the issue.  Many a piece of software has failed to respect that and crashed.  But, I’m not sure.

  Does anyone have any suggestions?  I’ve built it locally (via ports), so if there are compiler options I can/should try, I certainly can try.

  Thanks…

                         - Chris