linux-kernel - BUG: enabling psacct breaks fsfreeze

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 23 Oct 2012 11:43:51 +0200
From:	Nikola Ciprich <nikola.ciprich@...uxbox.cz>
To:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	nikola.ciprich@...uxbox.cz
Subject: BUG: enabling psacct breaks fsfreeze

Hi,

while trying to create consistent backups of KVM guest, I've discovered
that fsfreeze always hangs.. deeper investigation revealed psacct to be the culprit.
When psacct is disabled, fsfreeze works fine, when enabled, the command never returns.
I suppose that the problem is /var is not on separate partition (ie it's same volume
as /) and psacct isn't able to dump process exit information about fsfreeze command
thus creating deadlock..
problem is 100% reproducible on both latest 3.0.x kernel and 3.7-r1c.

Should more debugging information be needed, I'll be glad to provide whatever I can..

BR

nik

-- 
-------------------------------------
Ing. Nikola CIPRICH
LinuxBox.cz, s.r.o.
28.rijna 168, 709 00 Ostrava

tel.:   +420 591 166 214
fax:    +420 596 621 273
mobil:  +420 777 093 799
www.linuxbox.cz

mobil servis: +420 737 238 656
email servis: servis@...uxbox.cz
-------------------------------------

Content of type "application/pgp-signature" skipped