Bug#684645: marked as done (liblockfile1: Order of fcntl and dotlock in maillock)
Your message dated Mon, 11 Feb 2013 11:32:51 +0000
with message-id <E1U4rcx-0007uO-5R@franck.debian.org>
and subject line Bug#684645: fixed in sendmail 8.14.4-4
has caused the Debian Bug report #684645,
regarding liblockfile1: Order of fcntl and dotlock in maillock
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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immediately.)
--
684645: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=684645
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
- To: Debian Bug Tracking System <submit@bugs.debian.org>
- Subject: liblockfile1: Order of fcntl and dotlock in maillock
- From: Paul Szabo <paul.szabo@sydney.edu.au>
- Date: Sun, 12 Aug 2012 22:34:57 +1000
- Message-id: <20120812123457.10767.46034.reportbug@p639.pc.maths.usyd.edu.au>
Package: liblockfile1
Version: 1.09-4
Severity: serious
Justification: Policy 11.6
Debian policy
http://www.debian.org/doc/debian-policy/ch-customized-programs.html#s-mail-transport-agents
says:
... fcntl() locking must be combined with dot locking.
To avoid deadlocks, a program should use fcntl() first
and dot locking after this, or alternatively implement
the two locking methods in a non blocking way. Using
the functions maillock and mailunlock provided by the
liblockfile* packages is the recommended way to
realize this.
Looking at an strace of /usr/lib/sm.bin/mail.local it seems to use
/usr/lib/i386-linux-gnu/liblockfile.so.1 and shows:
link("/var/mail/.lk10336dp639", "/var/mail/psz.lock") = 0
open("/var/mail/psz", O_WRONLY|O_APPEND) = 4
fcntl64(4, F_SETLKW, {type=F_WRLCK, whence=SEEK_CUR, start=0, len=0}) = 0
which seems the wrong order.
Please see http://bugs.debian.org/648941 also.
Thanks, Paul
Paul Szabo psz@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics University of Sydney Australia
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 3.2.21-pk06.02-i386 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash
Versions of packages liblockfile1 depends on:
ii libc6 2.13-33
ii liblockfile-bin 1.09-4
ii multiarch-support 2.13-33
liblockfile1 recommends no packages.
liblockfile1 suggests no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: sendmail
Source-Version: 8.14.4-4
We believe that the bug you reported is fixed in the latest version of
sendmail, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 684645@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Jakub Safarik <jsafarik@ymail.com> (supplier of updated sendmail package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 06 Feb 2013 17:33:44 +0100
Source: sendmail
Binary: sendmail-bin rmail sensible-mda libmilter1.0.1 libmilter1.0.1-dbg libmilter-dev sendmail-doc sendmail sendmail-base sendmail-cf
Architecture: source all amd64
Version: 8.14.4-4
Distribution: unstable
Urgency: low
Maintainer: Jakub Safarik <jsafarik@ymail.com>
Changed-By: Jakub Safarik <jsafarik@ymail.com>
Description:
libmilter-dev - Sendmail Mail Filter API (Milter)
libmilter1.0.1 - Sendmail Mail Filter API (Milter)
libmilter1.0.1-dbg - Sendmail Mail Filter API (Milter)
rmail - MTA->UUCP remote mail handler
sendmail - powerful, efficient, and scalable Mail Transport Agent
sendmail-base - powerful, efficient, and scalable Mail Transport Agent
sendmail-bin - powerful, efficient, and scalable Mail Transport Agent
sendmail-cf - powerful, efficient, and scalable Mail Transport Agent
sendmail-doc - powerful, efficient, and scalable Mail Transport Agent
sensible-mda - Mail Delivery Agent wrapper
Closes: 684645 699117
Changes:
sendmail (8.14.4-4) unstable; urgency=low
.
* New maintainer. (Closes: #699117)
* New patch: lock-mail-local (thanks to Tim Marston)
- fix order of fcntl and dotlock in mail.local. (Closes: #684645)
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