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Date: Tue, 5 Dec 2000 20:42:15 +0100
From: Frank van Maarseveen <F.vanMaarseveen@inter.NL.net>
To: Andrew Morton <andrewm@uow.edu.au>
Cc: tytso@mit.edu, linux-kernel@vger.kernel.org
Subject: Re: 2.4.0-test11: kernel: waitpid(823) failed, -512
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In-Reply-To: <3A2C4917.1AEEE91D@uow.edu.au>; from andrewm@uow.edu.au on Tue, Dec 05, 2000 at 12:47:03PM +1100
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On Tue, Dec 05, 2000 at 12:47:03PM +1100, Andrew Morton wrote:
> tytso@mit.edu wrote:
> > 
> > On Sun, Dec 03, 2000 at 11:36:11PM +0100, Frank van Maarseveen wrote:
> > > While playing with routing (zebra) and PPP I regularly see this
> > > message appearing. It always happens when pppd terminates a connection,
> > > e.g:
> > > Dec  3 23:09:08 mimas kernel: waitpid(823) failed, -512
> > 
> > This means a system call returned with an error code of -ERESTARTSYS
> > when a signal wasn't pending; this is a kernel bug.
> > 
> > However, I've looked at the code to sys_wait4 (which implements
> > waitpid), and I can't see where this might happen.  Just before
> > end_wait4, it does do something potentially dangerous in that it
> > leaves retval set to -ERESTARTSYS, but in all of the code paths I can
> > see, retval gets reset before it exits.  The only thing I can think of
> > is a compiler bug; what version of gcc are you using?

gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release), from RH6.1

> > 
> > Puzzled
> 
> Ted,
> 
> it's caused by exec_usermodehelper().

I'm using modules as much as possible (for the fun of it). something
(zebra?) often tries to load net-pf-10 which I believe is ipv6. Not
configured however.

I'll try the patch.

-- 
Frank
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