Commit Graph

34 Commits

Author SHA1 Message Date
Colin Percival
8fd6c56d29 Change the current working directory to be inside the jail created by
the jail(8) command. [10:04]

Fix a one-NUL-byte buffer overflow in libopie. [10:05]

Correctly sanity-check a buffer length in nfs mount. [10:06]

Approved by:	so (cperciva)
Approved by:	re (kensmith)
Security:	FreeBSD-SA-10:04.jail
Security:	FreeBSD-SA-10:05.opie
Security:	FreeBSD-SA-10:06.nfsclient
2010-05-27 03:15:04 +00:00
Jamie Gritton
843c277bfa Handle kernels that don't have IPv6 by not sending an "ip6.addr"
parameter unless a (numeric) IPv6 address is given.  Even the default
binaries built with -DINET6 will work with IPv6-less kernels.  With an
eye to the future, similarly handle the possibility of an IPv4-less kernel.

Approved by:	re (kib), bz (mentor)
2009-07-31 14:30:06 +00:00
Jamie Gritton
de6f37045c Add libjail, a (somewhat) simpler interface to the jail_set and jail_get
system calls and the security.jail.param sysctls.

Approved by:	bz (mentor)
2009-06-24 18:18:35 +00:00
Jamie Gritton
ded788478f Remove obsolete comment describing how the command line is
no longer parsed.

Approved by:	bz (mentor)
2009-06-23 14:39:51 +00:00
Brooks Davis
54404cfb13 In preparation for raising NGROUPS and NGROUPS_MAX, change base
system callers of getgroups(), getgrouplist(), and setgroups() to
allocate buffers dynamically.  Specifically, allocate a buffer of size
sysconf(_SC_NGROUPS_MAX)+1 (+2 in a few cases to allow for overflow).

This (or similar gymnastics) is required for the code to actually follow
the POSIX.1-2008 specification where {NGROUPS_MAX} may differ at runtime
and where getgroups may return {NGROUPS_MAX}+1 results on systems like
FreeBSD which include the primary group.

In id(1), don't pointlessly add the primary group to the list of all
groups, it is always the first result from getgroups().  In principle
the old code was more portable, but this was only done in one of the two
places where getgroups() was called to the overall effect was pointless.

Document the actual POSIX requirements in the getgroups(2) and
setgroups(2) manpages.  We do not yet support a dynamic NGROUPS, but we
may in the future.

MFC after:	2 weeks
2009-06-19 15:58:24 +00:00
Jamie Gritton
029cb9c79d In the old-style jail command line, explicitly set parameters from the
security.jail.* sysctls since jail_set(2) doesn't do it implicitly.

Approved by:	bz (mentor)
2009-06-10 15:26:35 +00:00
Jamie Gritton
73d0971bf2 Add support for the arbitrary named jail parameters used by jail_set(2)
and jail_get(2).  Jail(8) can now create jails using a "name=value"
format instead of just specifying a limited set of fixed parameters; it
can also modify parameters of existing jails.  Jls(8) can display all
parameters of jails, or a specified set of parameters.  The available
parameters are gathered from the kernel, and not hard-coded into these
programs.

Small patches on killall(1) and jexec(8) to support jail names with
jail_get(2).

Approved by:	bz (mentor)
2009-05-27 14:30:26 +00:00
Jamie Gritton
7074cfa223 With the permission of phk@ change the license on remaining jail code
to a 2 clause BSD license.

Approved by:	phk
Approved by:	bz (mentor)
2009-04-29 16:02:52 +00:00
Bjoern A. Zeeb
413628a7e3 MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
  and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
  help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
  suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
  on cluster machines as well as all the testers and people
  who provided feedback the last months on freebsd-jail and
  other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by:	(see above)
MFC after:	3 months (this is just so that I get the mail)
X-MFC Before:   7.2-RELEASE if possible
2008-11-29 14:32:14 +00:00
Matteo Riondato
b484e04bf9 correct strtol(3) usage and style(9)
Reviewed by:	maxim
MFC after:	2 weeks
2006-05-12 15:14:43 +00:00
Maxim Konovalov
6dc044b45b o Style(9) the previous commit a bit. 2006-05-11 19:06:33 +00:00
Matteo Riondato
7deb00ccd9 Add the -s option to set jail's securelevel. This is useful for jails run with non-root privileges.
PR:	bin/80242
MFC after:	2 weeks
2006-05-11 13:04:23 +00:00
Maxim Konovalov
2edf0a4432 o Do not mangle current session user login name with jail -u|-U.
PR:		bin/94730
Submitted by:	Frank Behrens
MFC after:	1 month
2006-04-16 12:32:04 +00:00
Philip Paeps
cdafc85119 Add [-J jid_file] option to write out a JidFile, similar to a PidFile,
containing the jailid, path, hostname, ip and the command used to start
the jail.

PR:		misc/89883
Submitted by:	L. Jason Godsey <lannygodsey -at- yahoo.com>
Reviewed by:	phk
MFC after:	1 week
2005-12-03 17:32:39 +00:00
Xin LI
d1df3fcd3f Initialize lcap and pwd to NULL. This allows a WARNS=6 clean build,
hence bump it to 6.

Note that the last commit message was not quite accurate.  While the
assumption exists in the code, it's not possible to have an
uninitialized p there because if lflag is set when username is NULL
then execution would be terminated earlier.
2004-11-17 10:01:48 +00:00
Xin LI
95751846f1 The code path in main() dealing with lflag assumes that p was
initialized with NULL, while it is not.  So let's initialize
it.
2004-11-17 09:52:10 +00:00
Stefan Farfeleder
950cc39559 Pass an array of gid_t rather than an array of int to getgroups().
PR:	56646
2004-10-02 11:40:48 +00:00
Maxim Konovalov
5b242e8c08 o Add -l option to jail(8) similar to su(1): before running jail'ed
program under specific user's credentials, clean the environment and
set only a few variables.

PR:		bin/70024
Submitted by:	demon
MFC after:	1 month
2004-08-15 08:21:50 +00:00
Pawel Jakub Dawidek
232a681888 Prepare jail(8) utility for new functionality which will limit
seeing status of mounted file system for jailed processes.
Pass full path of jail's root directory to the kernel. mount(8) utility is
doing the same thing already.
2004-06-27 10:10:16 +00:00
Maxim Konovalov
927b481001 o Implement -U flag: run command as user which exists only in jail.
o getpwnam(3) returns NULL and does not set errno when the user does
  not exist.  Bail out with "no such user" instead of "Unknown error: 0".

PR:		bin/67262
Submitted by:	demon (-U flag)
MFC after:	3 weeks
2004-05-29 18:39:27 +00:00
Philippe Charnier
54ede02d10 add FBSDID 2003-07-06 12:44:11 +00:00
Mike Barcroft
25639ca722 Force output of jail ID (if necessary) before excuting the command,
otherwise redirection of stdout to a file using block buffering will
not complete in time.
2003-04-21 17:20:48 +00:00
Mike Barcroft
ebf5d9bc2c o Add jls(8) for listing active jails.
o Add jexec(8) to execute a command in an existing jail.
o Add -j option for killall(1) to kill all processes in a specified
  jail.
o Add -i option to jail(8) to output jail ID of newly created jail.
2003-04-09 03:04:12 +00:00
Maxim Konovalov
0389572f96 Free login_cap(3) resources after usage.
Submitted by:	demon
2003-04-07 10:16:37 +00:00
Maxim Konovalov
b026ec0eb8 o Fix error messages formatting, style.
Prodded by:	bde
Reviewed by:	bde
2003-04-02 09:20:08 +00:00
Maxim Konovalov
d6131f4b8e o Add -u <username> flag to jail(8): set user context before exec.
PR:		bin/44320
Submitted by:	Mike Matsnev <mike@po.cs.msu.su>
Reviewed by:	-current
MFC after:	6 weeks
2003-03-27 12:16:58 +00:00
Dag-Erling Smørgrav
d397408818 Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.
2002-04-22 13:44:47 +00:00
Dima Dorfman
3876038a6f Add missing includes and sort includes. 2001-06-24 20:28:19 +00:00
Dima Dorfman
2694efd413 Include missing header files which define functions for which gcc has
builtints (e.g., exit, strcmp).
2001-06-24 20:25:23 +00:00
Poul-Henning Kamp
7248ef86e0 Add a version number field to the jail(2) argument so that future changes
can be handled intelligently.

WARNING:  you will need to reinstall #includes and recompile jail(8).
1999-09-19 08:36:37 +00:00
Peter Wemm
97d92980a9 $Id$ -> $FreeBSD$ 1999-08-28 01:35:59 +00:00
Poul-Henning Kamp
c020621f03 Various cosmetics.
Submitted by:	Rudolf Cejka <cejkar@dcse.fee.vutbr.cz>
Reviewed by:	phk
1999-05-05 19:23:45 +00:00
Poul-Henning Kamp
ce5c1cd1ff Fix various bogons.
Submitted by:	Rudolf Cejka <cejkar@dcse.fee.vutbr.cz>
Reviewed by:	phk
1999-05-04 18:20:53 +00:00
Poul-Henning Kamp
75c1354190 This Implements the mumbled about "Jail" feature.
This is a seriously beefed up chroot kind of thing.  The process
is jailed along the same lines as a chroot does it, but with
additional tough restrictions imposed on what the superuser can do.

For all I know, it is safe to hand over the root bit inside a
prison to the customer living in that prison, this is what
it was developed for in fact:  "real virtual servers".

Each prison has an ip number associated with it, which all IP
communications will be coerced to use and each prison has its own
hostname.

Needless to say, you need more RAM this way, but the advantage is
that each customer can run their own particular version of apache
and not stomp on the toes of their neighbors.

It generally does what one would expect, but setting up a jail
still takes a little knowledge.

A few notes:

   I have no scripts for setting up a jail, don't ask me for them.

   The IP number should be an alias on one of the interfaces.

   mount a /proc in each jail, it will make ps more useable.

   /proc/<pid>/status tells the hostname of the prison for
   jailed processes.

   Quotas are only sensible if you have a mountpoint per prison.

   There are no privisions for stopping resource-hogging.

   Some "#ifdef INET" and similar may be missing (send patches!)

If somebody wants to take it from here and develop it into
more of a "virtual machine" they should be most welcome!

Tools, comments, patches & documentation most welcome.

Have fun...

Sponsored by:   http://www.rndassociates.com/
Run for almost a year by:       http://www.servetheweb.com/
1999-04-28 11:38:52 +00:00