Hi,
I get a panic in my logs:
postfix/master[22933]: daemon started -- version 3.2.2, configuration
/etc/postfix
postfix/postscreen[22945]: CONNECT from [A.B.C.D]:XXXXX to [E.F.G.H]:25
postfix/dnsblog[22947]: panic: dns_query: bad length -1 (h_errno=Unknown
error 0)
postfix/dnsblog[22946]: panic: dns_query: bad length -1 (h_errno=Unknown
error 0)
postfix/master[22933]: warning: process /libexec/postfix/dnsblog pid
22947 killed by signal 6
postfix/master[22933]: warning: /libexec/postfix/dnsblog: bad command
startup -- throttling
postfix/master[22933]: warning: process /libexec/postfix/dnsblog pid
22946 killed by signal 6
postfix/postscreen[22945]: PASS OLD [A.B.C.D]:XXXXX
The system is:
$ uname -a
FreeBSD foo.triaxx.org 11.1-RELEASE-p4 FreeBSD 11.1-RELEASE-p4 #0: Tue
Nov 14 06:12:40 UTC 2017
r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
postconf -M gives the following:
smtp inet n - n - 1 postscreen
smtpd pass - - n - - smtpd
submission inet n - n - 1 smtpd
pickup unix n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr unix n - n 300 1 qmgr
tlsmgr unix - - n 1000? 1 tlsmgr
tlsproxy unix - - n - 0 tlsproxy
dnsblog unix - - n - 0 dnsblog
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - n - - smtp
relay unix - - n - - smtp
showq unix n - n - - showq
error unix - - n - - error
retry unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache
The main.cf line that causes this message is:
postscreen_dnsbl_sites = zen.spamhaus.org, b.barracudacentral.org
The problem also occurs with 3.2.4. Since I can read this comment, I
suppose a bug:
/*
* Future proofing. If this reaches the panic call, then some code
change
* introduced a bug.
*/
if (len < 0)
msg_panic("dns_query: bad length %d (h_errno=%s)",
len, dns_strerror(h_errno));
