Hi,

Yeah... when you read that subject you probably had this weird gaze ô_Ò 
like I did when I came to that conclusion.

I've been experiencing segfaults in milter-greylist on one of my MX
running OpenBSD for a while.  I contacted Stuart (cc'ed) about 6 months
ago about this, but gave up because I couldn't manage to compile
everything with the debugging symbols.  This time after much struggle to
compile the ports chain with them, I finally managed to run
milter-greylist in gdb(1) with the hope to witness the live crash and
get a detailed stacktrace...

Except that even after tinkling Postfix, it never happened.  This simply 
worked fine.  So after some more tinkering I came to the following
conclusion: if I run strip(1) on /usr/local/lib/libbind/libbind.so.5.0
to remove the debugging symbols, then it will crash with the stacktrace
below.

Has anyone of you seen such a behavior in the past?

#0  0x00001cc53e386d40 in memcpy (dst0=0x1cc5c48b7000, src0=Variable "src0" is 
not available.
) at /usr/src/lib/libc/string/memcpy.c:94
#1  0x00001cc4f4d496d8 in __res_vinit () from 
/usr/local/lib/libbind/libbind.so.5.0
#2  0x00001cc4f4d48bda in __res_ninit () from 
/usr/local/lib/libbind/libbind.so.5.0
#3  0x00001cc50b181905 in SPF_dns_resolv_lookup (spf_dns_server=0x1cc5c48ab780, 
domain=0x1cc55122c1d0 "mydomain.org", rr_type=ns_t_spf, should_cache=1) at 
spf_dns_resolv.c:261
#4  0x00001cc50b180117 in SPF_dns_lookup (spf_dns_server=0x1cc5c48ab780, 
domain=0x1cc55122c1d0 "mydomain.org", rr_type=ns_t_spf, should_cache=1) at 
spf_dns.c:141
#5  0x00001cc50b180b16 in SPF_dns_cache_lookup (spf_dns_server=0x1cc5c48abc80, 
domain=0x1cc55122c1d0 "mydomain.org", rr_type=ns_t_spf, should_cache=1) at 
spf_dns_cache.c:408
#6  0x00001cc50b180117 in SPF_dns_lookup (spf_dns_server=0x1cc5c48abc80, 
domain=0x1cc55122c1d0 "mydomain.org", rr_type=ns_t_spf, should_cache=1) at 
spf_dns.c:141
#7  0x00001cc50b18e4e3 in SPF_server_get_record (spf_server=0x1cc5eb4154c0, 
spf_request=0x1cc5c48aeb00, spf_response=0x1cc5eb41b400, 
spf_recordp=0x1cc54f7c8700) at spf_server.c:351
#8  0x00001cc50b18c959 in SPF_request_query_mailfrom 
(spf_request=0x1cc5c48aeb00, spf_responsep=0x1cc54f7c87a0) at spf_request.c:291
#9  0x00001cc2ee1207ca in spf_check_internal (ad=0x1cc4f4c65948, as=AS_RCPT, 
ap=0x1cc54f7c8cd0, priv=0x1cc5c48af000) at spf.c:388
#10 0x00001cc2ee120c17 in spf_check (ad=0x1cc4f4c65948, as=AS_RCPT, 
ap=0x1cc54f7c8cd0, priv=0x1cc5c48af000) at spf.c:524
#11 0x00001cc2ee123a0d in acl_filter (stage=AS_RCPT, ctx=0x1cc5c48b2000, 
priv=0x1cc5c48af000) at acl.c:1902
#12 0x00001cc2ee1069ae in real_envrcpt (ctx=0x1cc5c48b2000, 
envrcpt=0x1cc5eb41c280) at milter-greylist.c:601
#13 0x00001cc2ee105de0 in mlfi_envrcpt (ctx=0x1cc5c48b2000, 
envrcpt=0x1cc5eb41c280) at milter-greylist.c:213
#14 0x00001cc52bfaa46e in st_rcpt () from /usr/local/lib/libmilter.so.4.0
#15 0x00001cc52bfab557 in mi_engine () from /usr/local/lib/libmilter.so.4.0
#16 0x00001cc52bfaca10 in mi_handle_session () from 
/usr/local/lib/libmilter.so.4.0
#17 0x00001cc52bfab7d9 in mi_thread_handle_wrapper () from 
/usr/local/lib/libmilter.so.4.0
#18 0x00001cc5a247d90e in _rthread_start (v=Variable "v" is not available.
) at /usr/src/lib/librthread/rthread.c:145
#19 0x00001cc53e33649b in __tfork_thread () at 
/usr/src/lib/libc/arch/amd64/sys/tfork_thread.S:75
#20 0x0000000000000000 in ?? ()


-- 
Jeremie Le Hen
[email protected]

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