Re: [RFC][PATCH] ns: Syscalls for better namespace sharing control. | KernelTrap

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing control.

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From: Jan Engelhardt

Subject: Re: [RFC][PATCH] ns: Syscalls for better namespace sharing control.

Date: Thursday, March 4, 2010 - 3:55 pm

On Thursday 2010-03-04 22:45, Eric W. Biederman wrote:
quoted text>
>So an unshare of the pid namespace that doesn't really take effect
>until we fork may actually be usable from pam, and in fact is probably
>the preferred implementation.  It looks like neither openssh nor login
>from util-linux-ng will cope properly with getting any pid back from
>wait() except the pid of their child.

Correct; I can tell from experience with pam_mount. GDM for example is 
very unhappy if you fork/exit processes in PAM modules and don't hide 
the fact by bending SIGCHLD from gdm_handler to mypam_handler (which 
itself is racy, suppose GDM re-set the SIGCHLD handler midway through).

(In this particular case however, I'd prefer if login programs like GDM 
just ignored any PIDs they did not spawn in the first place instead of 
moaning around.)
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Messages in current thread:

RFC: netfilter: nf_conntrack: add support for "conntrack z ..., Patrick McHardy, (Thu Jan 14, 7:05 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Thu Jan 14, 8:05 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Patrick McHardy, (Thu Jan 14, 8:37 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Thu Jan 14, 10:33 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Ben Greear, (Thu Jan 14, 11:32 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Patrick McHardy, (Fri Jan 15, 3:15 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Fri Jan 15, 8:03 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Fri Jan 15, 8:19 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Mon Feb 22, 1:46 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Mon Feb 22, 2:55 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Mon Feb 22, 4:17 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Tue Feb 23, 6:27 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Tue Feb 23, 7:07 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Tue Feb 23, 7:20 am)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Tue Feb 23, 1:00 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., jamal, (Tue Feb 23, 4:09 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Matt Helsley, (Tue Feb 23, 4:49 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Tue Feb 23, 6:32 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Serge E. Hallyn, (Tue Feb 23, 6:39 pm)

Re: RFC: netfilter: nf_conntrack: add support for "conntra ..., Eric W. Biederman, (Tue Feb 23, 6:43 pm)

[RFC][PATCH] ns: Syscalls for better namespace sharing con ..., Eric W. Biederman, (Thu Feb 25, 1:57 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Thu Feb 25, 2:31 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Matt Helsley, (Thu Feb 25, 2:46 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Feb 25, 2:49 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Feb 25, 2:54 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Thu Feb 25, 3:13 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Feb 25, 3:31 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Feb 25, 5:53 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Matt Helsley, (Thu Feb 25, 6:09 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Feb 25, 6:26 pm)

[RFC][PATCH] ns: Syscalls for better namespace sharing con ..., Eric W. Biederman, (Thu Feb 25, 8:15 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 1:35 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Fri Feb 26, 2:13 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 2:24 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Fri Feb 26, 2:34 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Fri Feb 26, 2:35 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 2:42 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 2:49 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Oren Laadan, (Fri Feb 26, 2:58 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 3:16 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Oren Laadan, (Fri Feb 26, 3:52 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Feb 26, 4:13 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Sat Feb 27, 1:30 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Sat Feb 27, 2:04 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Sat Feb 27, 2:21 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Sat Feb 27, 2:42 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Sat Feb 27, 9:16 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Sat Feb 27, 12:08 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Sat Feb 27, 12:29 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Sat Feb 27, 12:44 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Sun Feb 28, 3:05 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 1, 12:24 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 1, 2:42 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Cedric Le Goater, (Tue Mar 2, 6:10 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Tue Mar 2, 8:03 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Jan Engelhardt, (Tue Mar 2, 8:14 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Sukadev Bhattiprolu, (Tue Mar 2, 2:19 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Tue Mar 2, 2:45 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Tue Mar 2, 3:13 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Sukadev Bhattiprolu, (Tue Mar 2, 5:07 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Tue Mar 2, 5:46 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Serge E. Hallyn, (Wed Mar 3, 8:38 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Wed Mar 3, 9:50 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Wed Mar 3, 12:47 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Wed Mar 3, 1:16 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Jonathan Corbet, (Wed Mar 3, 1:29 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Wed Mar 3, 1:50 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Oren Laadan, (Wed Mar 3, 1:59 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Wed Mar 3, 2:05 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Thu Mar 4, 2:45 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Jan Engelhardt, (Thu Mar 4, 3:55 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Pavel Emelyanov, (Fri Mar 5, 12:18 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Fri Mar 5, 1:26 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Sat Mar 6, 7:47 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Sat Mar 6, 1:48 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Sat Mar 6, 2:26 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 1:32 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Mon Mar 8, 9:54 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Serge E. Hallyn, (Mon Mar 8, 10:07 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 10:29 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 10:35 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Serge E. Hallyn, (Mon Mar 8, 10:47 am)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Mon Mar 8, 12:57 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 1:24 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Mon Mar 8, 1:42 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 1:47 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Mon Mar 8, 2:12 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 2:25 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Serge E. Hallyn, (Mon Mar 8, 2:49 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Eric W. Biederman, (Mon Mar 8, 3:24 pm)

Re: [RFC][PATCH] ns: Syscalls for better namespace sharing ..., Daniel Lezcano, (Tue Mar 9, 3:03 am)