deadlock in signal handler with NPTL

[Thorsten Kukuk]

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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