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Date: Fri, 14 Dec 2012 15:13:18 GMT
From: Robert Schulze <rs@bytecamp.net>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Jails with numbers as names don't work
X-Send-Pr-Version: www-3.1
X-GNATS-Notify:

>Number:         174436
>Category:       kern
>Synopsis:       [jail] Jails with numbers as names don't work
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    gjb
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 14 15:20:00 UTC 2012
>Closed-Date:    Mon Jul 15 15:00:41 UTC 2013
>Last-Modified:  Mon Jul 15 15:10:07 UTC 2013
>Originator:     Robert Schulze
>Release:        9.1-PRERELEASE
>Organization:
bytecamp GmbH
>Environment:
FreeBSD xxxxx 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #0 r244185M: Fri Dec 14 14:14:25 CET 2012     root@xxxxx:/usr/obj/usr/src/sys/TEST  amd64

>Description:
When configuring jails with numbers as their names, one can't start a jail named "0" (system panics) or "1" (cannot start jail "1").

Maybe this could just be documented, or better an error message should be printed by /etc/rc.d/jail, that numbers can't be used as jail names.

This problem exists in previous versions of FreeBSD, too.

>How-To-Repeat:
/etc/rc.conf:

jail_0_rootdir="/mnt/jail-0"
jail_0_hostname="foobar0.example.com"
jail_0_ip="nn.yy.zz.aa"
jail_0_devfs_enable="YES"
jail_0_interface="em0"

jail_1_rootdir="/mnt/jail-1"
jail_1_hostname="foobar1.example.com"
jail_1_ip="nn.yy.zz.aa"
jail_1_devfs_enable="YES"
jail_1_interface="em0

# /etc/rc.d/jail start 0
-> panic

# /etc/rc.d/jail start 1
Configuring jails:.
Starting jails: cannot start jail "1": 
>Fix:
>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-jail 
Responsible-Changed-By: gjb 
Responsible-Changed-When: Fri Dec 14 15:28:51 UTC 2012 
Responsible-Changed-Why:  
Over to maintainers. 

If it should be documented that jail names must begin with a letter, 
I will be happy to document it. 


http://www.freebsd.org/cgi/query-pr.cgi?pr=174436 

From: Glen Barber <gjb@FreeBSD.org>
To: Eitan Adler <lists@eitanadler.com>
Cc: Robert Schulze <rs@bytecamp.net>,
	bug-followup <bug-followup@freebsd.org>
Subject: Re: misc/174436: Jails with numbers as names don't work
Date: Fri, 14 Dec 2012 10:58:15 -0500

 --xgyAXRrhYN0wYx8y
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 On Fri, Dec 14, 2012 at 10:51:48AM -0500, Eitan Adler wrote:
 > On 14 December 2012 10:13, Robert Schulze <rs@bytecamp.net> wrote:
 >=20
 > >>Description:
 > > When configuring jails with numbers as their names, one can't start a j=
 ail named "0" (system panics)
 >=20
 > This is not just a documentation bug.  I'm concerned about the system
 > panic here.
 >=20
 
 So am I, but I am the one that added the rc.conf(5) note about jail
 names containing only alphanumeric characters.
 
 Glen
 
 
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From: Eitan Adler <lists@eitanadler.com>
To: Robert Schulze <rs@bytecamp.net>, Glen Barber <gjb@freebsd.org>
Cc: bug-followup <bug-followup@freebsd.org>
Subject: Re: misc/174436: Jails with numbers as names don't work
Date: Fri, 14 Dec 2012 10:51:48 -0500

 On 14 December 2012 10:13, Robert Schulze <rs@bytecamp.net> wrote:
 
 >>Description:
 > When configuring jails with numbers as their names, one can't start a jail named "0" (system panics)
 
 This is not just a documentation bug.  I'm concerned about the system
 panic here.
 
 -- 
 Eitan Adler

From: Mateusz Guzik <mjguzik@gmail.com>
To: bug-followup@FreeBSD.org, rs@bytecamp.net
Cc:  
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Fri, 14 Dec 2012 17:01:54 +0100

 Hi,
 
 can you provide backtrace from this panic? Are you able to reproduce it?
 
 Does not panic for me.
 
 -- 
 Mateusz Guzik <mjguzik gmail.com>

From: Robert Schulze <rs@bytecamp.net>
To: Mateusz Guzik <mjguzik@gmail.com>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Mon, 17 Dec 2012 14:57:06 +0100

 Hello,
 
 Am 14.12.2012 17:01, schrieb Mateusz Guzik:
 > Hi,
 >
 > can you provide backtrace from this panic? Are you able to reproduce it?
 
 I can reproduce this behaviour reliably.
 Here is a backtrace, I had to type that manually:
 
 fault virtual address   = 0x110
 fault code              = supervisor read data, page not present
 instruction pointer     = 0x20:0xffffffff804d9d54
 stack pointer           = 0x28:0xffffff8489ce47d0
 frame pointer           = 0x28:0xffffff8489ce47f0
 code segment            = base 0x0, limit 0xfffff, type 0x1b
                          = DPL 0, pres 1, long 1, def32 0, gran 1
 processor eflags        = interrupt enabled, resume, IOPL = 0
 current process         = 1058 (jail)
 trap number             = 12
 panic: page fault
 cpuid = 7
 KDB: stack backtrace:
 #0 0xffffffff8053de06 at kdb_backtrace+0x66
 #1 0xffffffff80507c6e at panic+0x1ce
 #2 0xffffffff807579f0 at trap_fatal+0x290
 #3 0xffffffff80757d28 at trap_pfault+0x1e8
 #4 0xffffffff8075832e at trap+0x3be
 #5 0xffffffff80741bef at calltrap+0x8
 #6 0xffffffff804dbef6 at prison_deref+0x1f6
 #7 0xffffffff804debff at kern_jail_set+0x14af
 #8 0xffffffff804e1282 at sys_jail_set+0x62
 #9 0xffffffff807572d0 at amd64_syscall+0x540
 #10 0xffffffff80741ed7 at Xfast_syscall+0xf7
 
 with kind regards,
 Robert Schulze

From: Mateusz Guzik <mjguzik@gmail.com>
To: Robert Schulze <rs@bytecamp.net>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Mon, 17 Dec 2012 22:31:27 +0100

 On Mon, Dec 17, 2012 at 02:57:06PM +0100, Robert Schulze wrote:
 > Hello,
 > 
 > Am 14.12.2012 17:01, schrieb Mateusz Guzik:
 > >Hi,
 > >
 > >can you provide backtrace from this panic? Are you able to reproduce it?
 > 
 > I can reproduce this behaviour reliably.
 
 Can you send me your kernel or put somewhere for download?
 
 If not, provide output of the following:
 # addr2line -e /boot/kernel/kernel 0xffffffff804debff
 # addr2line -e /boot/kernel/kernel 0xffffffff804dbef6
 
 Also I don't think that '0' has any significance here. Can you change it
 to something else and try again? Can you try with different IP?
 Preferably 127.0.0.2 on lo0.
 
 > Here is a backtrace, I had to type that manually:
 > 
 > fault virtual address   = 0x110
 > fault code              = supervisor read data, page not present
 > instruction pointer     = 0x20:0xffffffff804d9d54
 > stack pointer           = 0x28:0xffffff8489ce47d0
 > frame pointer           = 0x28:0xffffff8489ce47f0
 > code segment            = base 0x0, limit 0xfffff, type 0x1b
 >                         = DPL 0, pres 1, long 1, def32 0, gran 1
 > processor eflags        = interrupt enabled, resume, IOPL = 0
 > current process         = 1058 (jail)
 > trap number             = 12
 > panic: page fault
 > cpuid = 7
 > KDB: stack backtrace:
 > #0 0xffffffff8053de06 at kdb_backtrace+0x66
 > #1 0xffffffff80507c6e at panic+0x1ce
 > #2 0xffffffff807579f0 at trap_fatal+0x290
 > #3 0xffffffff80757d28 at trap_pfault+0x1e8
 > #4 0xffffffff8075832e at trap+0x3be
 > #5 0xffffffff80741bef at calltrap+0x8
 > #6 0xffffffff804dbef6 at prison_deref+0x1f6
 > #7 0xffffffff804debff at kern_jail_set+0x14af
 > #8 0xffffffff804e1282 at sys_jail_set+0x62
 > #9 0xffffffff807572d0 at amd64_syscall+0x540
 > #10 0xffffffff80741ed7 at Xfast_syscall+0xf7
 > 
 > with kind regards,
 > Robert Schulze
 
 -- 
 Mateusz Guzik <mjguzik gmail.com>

From: Robert Schulze <rs@bytecamp.net>
To: Mateusz Guzik <mjguzik@gmail.com>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Tue, 18 Dec 2012 10:48:18 +0100

 Hi,
 
 Am 17.12.2012 22:31, schrieb Mateusz Guzik:
 >
 > Can you send me your kernel or put somewhere for download?
 >
 > If not, provide output of the following:
 > # addr2line -e /boot/kernel/kernel 0xffffffff804debff
 > # addr2line -e /boot/kernel/kernel 0xffffffff804dbef6
 
 # addr2line -e /boot/kernel/kernel 0xffffffff804debff
 /usr/src/sys/kern/kern_jail.c:1848
 # addr2line -e /boot/kernel/kernel 0xffffffff804dbef6
 /usr/src/sys/kern/kern_jail.c:4537
 
 Shall I build GENERIC on this machine and try again?
 
 >
 > Also I don't think that '0' has any significance here. Can you change it
 > to something else and try again? Can you try with different IP?
 > Preferably 127.0.0.2 on lo0.
 
 # vi /etc/rc.conf
 jail_0_rootdir="/mnt/jail-0"
 jail_0_hostname="foobar.example.com"
 jail_0_ip="127.0.0.2"
 jail_0_devfs_enable="YES"
 jail_0_interface="lo0"
 
 # /etc/rc.d/jail onestart 0
 Configuring jails:.
 Starting jails:
 -> SAME panic
 
 # vi /etc/rc.conf
 jail_j0_rootdir="/mnt/jail-0"
 jail_j0_hostname="foobar.example.com"
 jail_j0_ip="127.0.0.2"
 jail_j0_devfs_enable="YES"
 jail_j0_interface="lo0"
 
 # /etc/rc.d/jail onestart j0
 Configuring jails:.
 Starting jails:
   foobar.example.com
 -> NO panic.
 
 # jls
     JID  IP Address      Hostname                      Path
       1  127.0.0.2       foobar.example.com            /mnt/jail-0
 
 
 with kind regards,
 Robert Schulze

From: Mateusz Guzik <mjguzik@gmail.com>
To: Robert Schulze <rs@bytecamp.net>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Tue, 18 Dec 2012 11:18:37 +0100

 On Tue, Dec 18, 2012 at 10:48:18AM +0100, Robert Schulze wrote:
 > Hi,
 > 
 > Am 17.12.2012 22:31, schrieb Mateusz Guzik:
 > >
 > >Can you send me your kernel or put somewhere for download?
 > >
 > >If not, provide output of the following:
 > ># addr2line -e /boot/kernel/kernel 0xffffffff804debff
 > ># addr2line -e /boot/kernel/kernel 0xffffffff804dbef6
 > 
 > # addr2line -e /boot/kernel/kernel 0xffffffff804debff
 > /usr/src/sys/kern/kern_jail.c:1848
 > # addr2line -e /boot/kernel/kernel 0xffffffff804dbef6
 > /usr/src/sys/kern/kern_jail.c:4537
 > 
 > >Also I don't think that '0' has any significance here. Can you change it
 > >to something else and try again? Can you try with different IP?
 > >Preferably 127.0.0.2 on lo0.
 > 
 
 I was reading wrong version of rc.d script. Name is passed with -n switch.
 
 Looks like we can get to prison_deref before RACCT is initialized for
 given prison.
 
 Please test the following:
 diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
 index 1dc43ab..7ca1d72 100644
 --- a/sys/kern/kern_jail.c
 +++ b/sys/kern/kern_jail.c
 @@ -2604,7 +2604,8 @@ prison_deref(struct prison *pr, int flags)
                         cpuset_rel(pr->pr_cpuset);
                 osd_jail_exit(pr);
  #ifdef RACCT
 -               prison_racct_detach(pr);
 +               if (pr->pr_prison_racct != NULL)
 +                       prison_racct_detach(pr);
  #endif
                 free(pr, M_PRISON);
 
 
 -- 
 Mateusz Guzik <mjguzik gmail.com>

From: Robert Schulze <rs@bytecamp.net>
To: Mateusz Guzik <mjguzik@gmail.com>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Tue, 18 Dec 2012 12:01:43 +0100

 Hi,
 
 Am 18.12.2012 11:18, schrieb Mateusz Guzik:
 > I was reading wrong version of rc.d script. Name is passed with -n switch.
 >
 > Looks like we can get to prison_deref before RACCT is initialized for
 > given prison.
 >
 > Please test the following:
 > diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
 > index 1dc43ab..7ca1d72 100644
 > --- a/sys/kern/kern_jail.c
 > +++ b/sys/kern/kern_jail.c
 > @@ -2604,7 +2604,8 @@ prison_deref(struct prison *pr, int flags)
 >                          cpuset_rel(pr->pr_cpuset);
 >                  osd_jail_exit(pr);
 >   #ifdef RACCT
 > -               prison_racct_detach(pr);
 > +               if (pr->pr_prison_racct != NULL)
 > +                       prison_racct_detach(pr);
 >   #endif
 >                  free(pr, M_PRISON);
 >
 
 this fixed the panic, but the jail can still not be started:
 
 # /etc/rc.d/jail onestart 0
 Configuring jails:.
 Starting jails: cannot start jail "0":
 .
 
 with kind regards,
 Robert Schulze

From: Mateusz Guzik <mjguzik@gmail.com>
To: Robert Schulze <rs@bytecamp.net>
Cc: bug-followup@FreeBSD.org
Subject: Re: misc/174436: [jail] Jails with numbers as names don't work
Date: Tue, 18 Dec 2012 12:08:30 +0100

 On Tue, Dec 18, 2012 at 12:01:43PM +0100, Robert Schulze wrote:
 > Hi,
 > 
 > Am 18.12.2012 11:18, schrieb Mateusz Guzik:
 > >I was reading wrong version of rc.d script. Name is passed with -n switch.
 > >
 > >Looks like we can get to prison_deref before RACCT is initialized for
 > >given prison.
 > >
 > >Please test the following:
 > >diff --git a/sys/kern/kern_jail.c b/sys/kern/kern_jail.c
 > >index 1dc43ab..7ca1d72 100644
 > >--- a/sys/kern/kern_jail.c
 > >+++ b/sys/kern/kern_jail.c
 > >@@ -2604,7 +2604,8 @@ prison_deref(struct prison *pr, int flags)
 > >                         cpuset_rel(pr->pr_cpuset);
 > >                 osd_jail_exit(pr);
 > >  #ifdef RACCT
 > >-               prison_racct_detach(pr);
 > >+               if (pr->pr_prison_racct != NULL)
 > >+                       prison_racct_detach(pr);
 > >  #endif
 > >                 free(pr, M_PRISON);
 > >
 > 
 > this fixed the panic, but the jail can still not be started:
 > 
 > # /etc/rc.d/jail onestart 0
 > Configuring jails:.
 > Starting jails: cannot start jail "0":
 > .
 
 Forgot to add:
 '0' is explicitly forbidden. Underlying reason is that you already have
 jail 0 - your main system.
 
 The only problem here was that cleanup was incorrect. And possibly
 documentation should note that '0' is already taken.
 -- 
 Mateusz Guzik <mjguzik gmail.com>
State-Changed-From-To: open->patched 
State-Changed-By: gjb 
State-Changed-When: Fri Jul 12 22:02:38 UTC 2013 
State-Changed-Why:  
r253290 adds a note to rc.conf(5) that a jail with literal 
name of '0' is not allowed. 



Responsible-Changed-From-To: freebsd-jail->gjb 
Responsible-Changed-By: gjb 
Responsible-Changed-When: Fri Jul 12 22:02:38 UTC 2013 
Responsible-Changed-Why:  
r253290 adds a note to rc.conf(5) that a jail with literal 
name of '0' is not allowed. 


http://www.freebsd.org/cgi/query-pr.cgi?pr=174436 

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/174436: commit references a PR
Date: Fri, 12 Jul 2013 22:02:19 +0000 (UTC)

 Author: gjb
 Date: Fri Jul 12 22:02:11 2013
 New Revision: 253290
 URL: http://svnweb.freebsd.org/changeset/base/253290
 
 Log:
   Document that a literal jail name of 0 (zero) is not allowed.
   
   PR:		174436
   Submitted by:	Robert Schulze
   Reviewed by:	mjg
   MFC after:	3 days
 
 Modified:
   head/share/man/man5/rc.conf.5
 
 Modified: head/share/man/man5/rc.conf.5
 ==============================================================================
 --- head/share/man/man5/rc.conf.5	Fri Jul 12 22:01:18 2013	(r253289)
 +++ head/share/man/man5/rc.conf.5	Fri Jul 12 22:02:11 2013	(r253290)
 @@ -24,7 +24,7 @@
  .\"
  .\" $FreeBSD$
  .\"
 -.Dd July 9, 2013
 +.Dd July 12, 2013
  .Dt RC.CONF 5
  .Os
  .Sh NAME
 @@ -3875,6 +3875,11 @@ configure multiple jails.
  The names specified in this list will be used to
  identify settings common to an instance of a jail,
  and should contain alphanumeric characters only.
 +The literal jail name of
 +.Dq Li 0
 +.Pq zero
 +is not allowed.
 +.Pp
  Assuming that the jail in question was named
  .Li vjail ,
  you would have the following dependent variables:
 _______________________________________________
 svn-src-all@freebsd.org mailing list
 http://lists.freebsd.org/mailman/listinfo/svn-src-all
 To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
 
State-Changed-From-To: patched->closed 
State-Changed-By: gjb 
State-Changed-When: Mon Jul 15 15:00:24 UTC 2013 
State-Changed-Why:  
MFC complete. 


http://www.freebsd.org/cgi/query-pr.cgi?pr=174436 

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/174436: commit references a PR
Date: Mon, 15 Jul 2013 15:00:26 +0000 (UTC)

 Author: gjb
 Date: Mon Jul 15 15:00:17 2013
 New Revision: 253364
 URL: http://svnweb.freebsd.org/changeset/base/253364
 
 Log:
   MFC r253290:
    Document that a literal jail name of 0 (zero) is not allowed.
   
   PR:		174436
 
 Modified:
   stable/8/share/man/man5/rc.conf.5
 Directory Properties:
   stable/8/share/man/man5/   (props changed)
 
 Modified: stable/8/share/man/man5/rc.conf.5
 ==============================================================================
 --- stable/8/share/man/man5/rc.conf.5	Mon Jul 15 14:59:45 2013	(r253363)
 +++ stable/8/share/man/man5/rc.conf.5	Mon Jul 15 15:00:17 2013	(r253364)
 @@ -24,7 +24,7 @@
  .\"
  .\" $FreeBSD$
  .\"
 -.Dd July 22, 2012
 +.Dd July 12, 2013
  .Dt RC.CONF 5
  .Os
  .Sh NAME
 @@ -3502,6 +3502,11 @@ configure multiple jails.
  The names specified in this list will be used to
  identify settings common to an instance of a jail,
  and should contain alphanumeric characters only.
 +The literal jail name of
 +.Dq Li 0
 +.Pq zero
 +is not allowed.
 +.Pp
  Assuming that the jail in question was named
  .Li vjail ,
  you would have the following dependent variables:
 _______________________________________________
 svn-src-all@freebsd.org mailing list
 http://lists.freebsd.org/mailman/listinfo/svn-src-all
 To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
 

From: dfilter@FreeBSD.ORG (dfilter service)
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/174436: commit references a PR
Date: Mon, 15 Jul 2013 14:59:58 +0000 (UTC)

 Author: gjb
 Date: Mon Jul 15 14:59:45 2013
 New Revision: 253363
 URL: http://svnweb.freebsd.org/changeset/base/253363
 
 Log:
   MFC r253290:
    Document that a literal jail name of 0 (zero) is not allowed.
   
   PR:		174436
   Approved by:	re (glebius)
 
 Modified:
   stable/9/share/man/man5/rc.conf.5
 Directory Properties:
   stable/9/share/man/man5/   (props changed)
 
 Modified: stable/9/share/man/man5/rc.conf.5
 ==============================================================================
 --- stable/9/share/man/man5/rc.conf.5	Mon Jul 15 14:28:59 2013	(r253362)
 +++ stable/9/share/man/man5/rc.conf.5	Mon Jul 15 14:59:45 2013	(r253363)
 @@ -24,7 +24,7 @@
  .\"
  .\" $FreeBSD$
  .\"
 -.Dd June 20, 2013
 +.Dd July 12, 2013
  .Dt RC.CONF 5
  .Os
  .Sh NAME
 @@ -3858,6 +3858,11 @@ configure multiple jails.
  The names specified in this list will be used to
  identify settings common to an instance of a jail,
  and should contain alphanumeric characters only.
 +The literal jail name of
 +.Dq Li 0
 +.Pq zero
 +is not allowed.
 +.Pp
  Assuming that the jail in question was named
  .Li vjail ,
  you would have the following dependent variables:
 _______________________________________________
 svn-src-all@freebsd.org mailing list
 http://lists.freebsd.org/mailman/listinfo/svn-src-all
 To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
 
>Unformatted:
