Re: su starts behaving oddly sometimes on F19

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On Fri, 2013-05-17 at 08:14 +0200, Jan Synacek wrote:
> On 05/17/2013 07:29 AM, Adam Williamson wrote:
> > This is a weird bug I've seen 3 or 4 times since upgrading to F19, and
> > am having trouble pinning down.
> > 
> > Occasionally, after my session has been up for some time, runs of 'su'
> > start behaving oddly. After I enter the root password, it takes a long
> > time - longer than the delay that's always happened when you fat-finger
> > your password, even - before it succeeds. Usually, of course, it's
> > instant. But when this bug happens, I just get to sit there while it
> > thinks about it for like 10-15 seconds before I eventually get a root
> > prompt.
> > 
> > This only applies to my desktop session - but it applies to any terminal
> > running in the desktop. At least, it applies to gnome-terminal (even if
> > closed and opened again) and xterm. But if I go to ctrl-alt-f2, login,
> > and run an 'su', that still returns instantly.
> > 
> > I've tried strace'ing su, but interestingly, I can't get it to work:
> > running su via strace always seems to result in "Authentication
> > failure" (which doesn't display this bug; it's only _normally_ slow, the
> > same slowness that has always been the case when you fail the password).
> > 
> > So I'm kinda stuck, really. Has anyone else seen this? Any bright ideas
> > for debugging it? Thanks!
> > 
> 
> Just a guess, but is your shell a subprocess of sssd? I have no idea if that
> might have any influence.

It doesn't look like it, no.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
http://www.happyassassin.net

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