From: Thorsten Kukuk <kukuk@suse.de>
To: Jakub Jelinek <jakub@redhat.com>
Cc: libc-hacker@sources.redhat.com
Subject: Re: deadlock in signal handler with NPTL
Date: Wed, 23 Jun 2004 04:26:00 -0000 [thread overview]
Message-ID: <20040623042256.GA6177@suse.de> (raw)
In-Reply-To: <20040622195237.GK5191@sunsite.ms.mff.cuni.cz>
On Tue, Jun 22, Jakub Jelinek wrote:
> On Tue, Jun 22, 2004 at 11:50:59PM +0200, Thorsten Kukuk wrote:
> >
> > Hi,
> >
> > I got the following test program. I know, it is very ugly and there
> > are a lot of things somebody should not do, but this is something
> > what programs like sshd are doing.
>
> Then they should be fixed. Neither syslog, nor printf, nor fflush
> are supposed to be async-signal safe, nor they actually are in glibc.
Yes, but the problem is: Nearly every daemon on a Linux system is
calling syslog() in a signal handler and it seems to be very easy
to deadlock them on every Linux system running glibc/NPTL. While
there seems to be no other system with the same problem.
Thorsten
--
Thorsten Kukuk http://www.suse.de/~kukuk/ kukuk@suse.de
SuSE Linux AG Maxfeldstr. 5 D-90409 Nuernberg
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next prev parent reply other threads:[~2004-06-23 4:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-22 21:51 Thorsten Kukuk
2004-06-22 22:07 ` Jakub Jelinek
2004-06-23 4:26 ` Thorsten Kukuk [this message]
2004-06-23 4:41 ` Steve Munroe
2004-06-23 6:56 ` Thorsten Kukuk
2004-06-23 8:23 ` Jakub Jelinek
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