Strange process
Kris Kennaway
kris at obsecurity.org
Wed Feb 15 14:54:24 PST 2006
On Wed, Feb 15, 2006 at 04:34:32PM -0600, Dan Nelson wrote:
> In the last episode (Feb 15), Kris Kennaway said:
> > On Wed, Feb 15, 2006 at 01:42:04PM -0600, Dan Nelson wrote:
> > > In the last episode (Feb 15), Ivan Kolosovskiy said:
> > > > top:
> > > > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> > > > 38410 findfile 1 96 0 0K 0K START 0 0:00 0.00% grotty
> > > >
> > > > ps:
> > > > host$ ps -waux | grep grotty
> > > > findfile 38410 0,0 0,0 0 0 p6 REJ 19:57 0:00,25 [grotty]
> > >
> > > E in the STAT column means the process is trying to exit, but
> > > can't. What does "ps lp 38410" print? The MWCHAN column should say
> > > where in the kernel the process is stuck.
> >
> > I often see this too. For example:
> >
> > PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
> > 5357 kkenn 1 96 0 0K 0K START 0:00 0.35% xpdf
> >
> > > ps -waux | grep xpdf
> > kkenn 5357 0.3 0.0 0 0 ?? RE Sun08PM 0:00.20 [xpdf]
> >
> > > ps lp 5357
> > UID PID PPID CPU PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND
>
> That syntax should have worked... Try a plain "px axl | grep xpdf"
> instead.
You're not mistaken, it's just not there.
> ps axl | grep xpdf
1000 5357 78788 2 96 0 0 0 - RE ?? 0:00.20 [xpdf]
> ps -p 5357
PID TT STAT TIME COMMAND
Kris
> I think top's START state corresponds to the ~200-line window of code
> in kern_fork.c:fork1() between p_state=PRS_NEW and p_state=PRS_NORMAL,
> but I'm not positive.
>
> --
> Dan Nelson
> dnelson at allantgroup.com
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