On Fri, 18 Mar 2022, Patrik Peng via Exim-users wrote:
On 17.03.22 21:20, Jeremy Harris via Exim-users wrote:
Being certain would be better.
Indeed. To be sure we created a new build based on the portstree + the
following changes:
-
https://git.exim.org/exim.git/commitdiff/2ead369f8435918f3f15408b9394e580bcaf0910
-
https://github.com/Exim/exim/commit/c57309a50444d858c0a2dc1581846a850d78a9ad
The changes for https://bugs.exim.org/show_bug.cgi?id=2831 regarding some
SIGSEGVs are already included in the portstree.
Can you get a corefile?
I managed to create one but without any debug symbols. As it contains some
confidential data, I can't share it directly.
But here is a backtrace that hopefully is of any use:
#0 0x0000000800671695 in punycode_encode () from /usr/local/lib/libidn.so.12
#1 0x0000000000321242 in string_localpart_utf8_to_alabel ()
#2 0x000000000032154d in string_address_utf8_to_alabel ()
#3 0x00000000003359c7 in smtp_write_mail_and_rcpt_cmds ()
#4 0x000000000033834c in ?? ()
#5 0x0000000000337024 in smtp_transport_entry ()
#6 0x0000000000289f32 in ?? ()
#7 0x00000000002857e1 in deliver_message ()
#8 0x0000000000295a53 in main ()
Is that a locally built copy of libidn ?
The punycode_encode man page on Ubuntu 21.10 isword-for-word the same as
https://www.freebsd.org/cgi/man.cgi?query=punycode_encode&manpath=FreeBSD+13.0-RELEASE+and+Ports
Does your libidn have any different features ?
If desired, I can try to get one with debug symbols next week.
All affected messages' spool file contain some umlauts or other non-ascii
chars in the recipients localpart:
---8<---
-tls_resumption A
-smtputf8
XX
1
ßßßßßß@somehost.net
176P Received: from mailnull by ...
---8<---
Manually removing the "-smtputf8" line in the spool file causes the segfault
to disappear on the next delivery attempt.
--
Andrew C. Aitchison Kendal, UK
[email protected]
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