Scott Kitterman:
> I have been remiss in forwarding this bug report, thinking I would get time
> to
> build a concise test case. It keeps not happening, so here you go.
>
> A Debian user reported [1] a problem where their cleanup process was killed
> by
> signal 11 during local mail injection:
>
> Aug 06 16:57:30 amilcar postfix/pickup[11470]: warning:
> maildrop/88D7A333A: error writing 7082252D6: queue file write error
> Aug 06 16:57:30 amilcar postfix/master[6205]: warning: process
> /usr/lib/postfix/sbin/cleanup pid 18641 killed by signal 11
>
> We did the usual is it apparmor dance. They did provide a trace [2]. After
> some work they discovered that the users associated with all the failures had
> a passwd comment set to a single space, e.g.[3]:
>
> username:x:1234:1234: :/home/username:/bin/bash
>
> This was using Postfix 3.4.14.
>
> Any suggestions?
This was FIXED IN JULY 2021 with:
postfix-3.3.19
postfix-3.4.22
postfix-3.5.12
postfix-3.6.2
Do we have a process problem?
Wietse
20210705
Bugfix (introduced: Postfix 3.3): "null pointer read" error
in the cleanup daemon when "header_from_format = standard"
(the default as of Postfix 3.3) and email was submitted
with /usr/sbin/sendmail without From: header, and an all-space
full name was specified in 1) the password file, 2) with
"sendmail -F", or 3) with the NAME environment variable.
Found by Renaud Metrich. File: cleanup/cleanup_message.c.
