Bug 13107

Summary: LTP 20080131 causes defunct processes w/2.6.30-rc1
Product: Process Management Reporter: Rafael J. Wysocki (rjw)
Component: OtherAssignee: process_other
Status: CLOSED WILL_NOT_FIX    
Severity: normal CC: alan
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.30-rc1 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 13070    

Description Rafael J. Wysocki 2009-04-16 21:27:48 UTC 
Subject    : LTP 20080131 causes defunct processes w/2.6.30-rc1 (possible ptrace issue?)
Submitter  : Kumar Gala <galak@kernel.crashing.org>
Date       : 2009-04-09 15:43
References : http://marc.info/?l=linux-kernel&m=123929187208953&w=4
Handled-By : Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>

This entry is being used for tracking a regression from 2.6.29.  Please don't
close it until the problem is fixed in the mainline.

Caused by:

commit b3bfa0cba867f23365b81658b47efd906830879b
Author: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Date:   Thu Apr 2 16:58:08 2009 -0700

     signals: protect cinit from blocked fatal signals

     Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
     Cc: Oleg Nesterov <oleg@tv-sign.ru>
     Cc: Roland McGrath <roland@redhat.com>
     Cc: "Eric W. Biederman" <ebiederm@xmission.com>
     Cc: Daniel Lezcano <daniel.lezcano@free.fr>
     Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

First-Bad-Commit : b3bfa0cba867f23365b81658b47efd906830879b
Comment 1 Rafael J. Wysocki 2009-04-17 21:17:38 UTC 
References : http://lkml.org/lkml/2009/4/10/193
Comment 2 Rafael J. Wysocki 2009-05-13 10:44:52 UTC 
Notify-Also : Oleg Nesterov <oleg@tv-sign.ru>
Comment 3 Rafael J. Wysocki 2009-05-18 17:24:12 UTC 
References : http://lkml.org/lkml/2009/5/17/149
Comment 4 Alan 2009-05-21 20:49:42 UTC 
Linus - "People convinced me it wasn't really a regression. LTP has already been 
changed, and there are people out there who actually want to stop init for 
debugging etc."
Comment 5 Rafael J. Wysocki 2009-05-23 00:06:07 UTC 
On Friday 22 May 2009, Linus Torvalds wrote:
> 
> On Sat, 16 May 2009, Rafael J. Wysocki wrote:
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=13107
> > Subject             : LTP 20080131 causes defunct processes w/2.6.30-rc1
> > Submitter   : Kumar Gala <galak@kernel.crashing.org>
> > Date                : 2009-04-09 15:43 (38 days old)
> > Handled-By  : Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
> 
> This one seems to have become "not-a-bug". Yes, LTP used to check that you 
> cannot send SIGSTP to init, but people do want to send signals to init 
> (especially when they are inside pid-namespace containers), and as long as 
> it's only a LTP test that already got modified (and not some actual 
> real-life usage), I'm considering this a "test failed because it was 
> testing for behavior that we want to change" at least for now.