https://bugs.exim.org/show_bug.cgi?id=3030
Bug ID: 3030
Summary: "null conn-context pointer" logged in smtp_out.c
Product: Exim
Version: 4.97
Hardware: x86
OS: Linux
Status: NEW
Severity: bug
Priority: medium
Component: Transports
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
https://github.com/Exim/exim/blob/master/src/src/smtp_out.c#L569
The above code has a null guard and an "XXX" comment suggesting that it wasn't
known what was triggering the null.
I can reliably reproduce this with a recipient verify that does a DANE check
for a specific host which returns SERVFAIL for the TLSA lookup.
I haven't quite pinned down what goes wrong, but I think it handles the DNS
lookup failure incorrectly and attempts to close an SMTP connection that was
never opened.
The config has this:
acl_check_rcpt:
deny
!verify = recipient/callout=10s
and:
remote_smtp:
driver = smtp
hosts_require_dane = *
Obviously this isn't a serious bug, as the null guard masks the issue, but I
thought I'd provide context on what was triggering it after we tripped over the
segfault in production on an older version of Exim.
--
You are receiving this mail because:
You are on the CC list for the bug.
--
## subscription configuration (requires account):
## https://lists.exim.org/mailman3/postorius/lists/exim-dev.lists.exim.org/
## unsubscribe (doesn't require an account):
## [email protected]
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/
