Commit Graph

277 Commits

Author SHA1 Message Date
Jamie Gritton
b307954481 In hardened systems, where the security.bsd.unprivileged_proc_debug sysctl
node is set, allow setting security.bsd.unprivileged_proc_debug per-jail.
In part, this is needed to create jails in which the Address Sanitizer
(ASAN) fully works as ASAN utilizes libkvm to inspect the virtual address
space. Instead of having to allow unprivileged process debugging for the
entire system, allow setting it on a per-jail basis.

The sysctl node is still security.bsd.unprivileged_proc_debug and the
jail(8) param is allow.unprivileged_proc_debug. The sysctl code is now a
sysctl proc rather than a sysctl int. This allows us to determine setting
the flag for the corresponding jail (or prison0).

As part of the change, the dynamic allow.* API needed to be modified to
take into account pr_allow flags which may now be disabled in prison0.
This prevents conflicts with new pr_allow flags (like that of vmm(4)) that
are added (and removed) dynamically.

Also teach the jail creation KPI to allow differences for certain pr_allow
flags between the parent and child jail. This can happen when unprivileged
process debugging is disabled in the parent prison, but enabled in the
child.

Submitted by:	Shawn Webb <lattera at gmail.com>
Obtained from:	HardenedBSD (45b3625edba0f73b3e3890b1ec3d0d1e95fd47e1, deba0b5078cef0faae43cbdafed3035b16587afc, ab21eeb3b4c72f2500987c96ff603ccf3b6e7de8)
Relnotes:	yes
Sponsored by:	HardenedBSD and G2, Inc
Differential Revision:	https://reviews.freebsd.org/D18319
2018-11-27 17:51:50 +00:00
Eugene Grosbein
1e1a4743ba jail(8): introduce new command option -e to exhibit
a list of configured non-wildcard jails with their parameters,
no matter running or not.

The option -e takes separator argument that is used
to separate printed parameters. It will be used with following
additions to system periodic scripts to differentiate parts
of directory tree belonging jails as opposed to host's.

MFC after:	1 month
2018-11-10 12:03:57 +00:00
Jamie Gritton
4520f617c9 Fix typos from r339409.
Reported by:	maxim
Approved by:	re (gjb)
2018-10-18 15:02:57 +00:00
Jamie Gritton
b19d66fd5a Add a new jail permission, allow.read_msgbuf. When true, jailed processes
can see the dmesg buffer (this is the current behavior).  When false (the
new default), dmesg will be unavailable to jailed users, whether root or
not.

The security.bsd.unprivileged_read_msgbuf sysctl still works as before,
controlling system-wide whether non-root users can see the buffer.

PR:		211580
Submitted by:	bz
Approved by:	re@ (kib@)
MFC after:	3 days
2018-10-17 16:11:43 +00:00
Bjoern Heidotting
951de5548b In r324732 sysinstall was replaced by bsdinstall.
However, for post-install configuration, bsdinstall
is not of much use. Point the user to bsdconfig instead.

Reviewed by:	0mp, bcr
Approved by:	0mp, bcr
Differential Revision:	https://reviews.freebsd.org/D16751
2018-08-20 18:17:50 +00:00
Jamie Gritton
07ebf3dd69 security.jail.enforce_statfs is handled by jail_set(2), so handling it in
userspace jail(8) is redundant.

Differential Revision:	D14791
2018-08-16 18:30:49 +00:00
Jamie Gritton
92bceb9756 Don't let clobber jailparam values when checking for modification of
init-only parameters.

Compare string parameter values with strncmp, not memcmp.

PR:		230487
Reported by:	Jason Mader
MFC after:	3 days
2018-08-15 20:23:17 +00:00
Alexander Leidinger
f6c0e63bf7 - Add exec hook "exec.created". This is called when the jail is
created and before exec.start is called.			[1]
- Bump __FreeBSD_version.

This allows to attach ZFS datasets and various other things to be
done before any command/service/rc-script is started in the new
jail.

PR:			228066					[1]
Reviewed by:		jamie					[1]
Submitted by:		Stefan Grönke <stefan@gronke.net>	[1]
Differential Revision:	https://reviews.freebsd.org/D15330	[1]
2018-08-15 18:35:42 +00:00
Marcelo Araujo
be963beee6 - Add the ability to run bhyve(8) within a jail(8).
This patch adds a new sysctl(8) knob "security.jail.vmm_allowed",
by default this option is disable.

Submitted by:	Shawn Webb <shawn.webb____hardenedbsd.org>
Reviewed by:	jamie@ and myself.
Relnotes:	Yes.
Sponsored by:	HardenedBSD and G2, Inc.
Differential Revision:	https://reviews.freebsd.org/D16057
2018-08-01 00:39:21 +00:00
Antoine Brodin
ccd6ac9f6e Add allow.mlock to jail parameters
It allows locking or unlocking physical pages in memory within a jail

This allows running elasticsearch with "bootstrap.memory_lock" inside a jail

Reviewed by:	jamie@
Differential Revision:	https://reviews.freebsd.org/D16342
2018-07-29 12:41:56 +00:00
Alan Somers
5717aa2d2a Allow mounting FUSE filesystems in jails
Reviewed by:	jamie
MFC after:	2 weeks
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D16371
2018-07-20 21:35:31 +00:00
Jamie Gritton
0e5c6bd436 Make it easier for filesystems to count themselves as jail-enabled,
by doing most of the work in a new function prison_add_vfs in kern_jail.c
Now a jail-enabled filesystem need only mark itself with VFCF_JAIL, and
the rest is taken care of.  This includes adding a jail parameter like
allow.mount.foofs, and a sysctl like security.jail.mount_foofs_allowed.
Both of these used to be a static list of known filesystems, with
predefined permission bits.

Reviewed by:	kib
Differential Revision:	D14681
2018-05-04 20:54:27 +00:00
Pedro F. Giffuni
1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00
Ed Maste
72130735d8 Strip EOL whitespace in usr.sbin/{jail,jexec} 2017-11-10 14:53:16 +00:00
Bryan Drewery
ea825d0274 DIRDEPS_BUILD: Update dependencies.
Sponsored by:	Dell EMC Isilon
2017-10-31 00:07:04 +00:00
Benjamin Kaduk
72cc0b3d93 Adopt jail.8 to our brave new bsdinstall world
Submitted by:	Steve Kargl
MFC after:	3 days
2017-10-18 22:56:46 +00:00
Allan Jude
e28f9b7d03 Jails: Optionally prevent jailed root from binding to privileged ports
You may now optionally specify allow.noreserved_ports to prevent root
inside a jail from using privileged ports (less than 1024)

PR:		217728
Submitted by:	Matt Miller <mattm916@pulsar.neomailbox.ch>
Reviewed by:	jamie, cem, smh
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D10202
2017-06-06 02:15:00 +00:00
Jamie Gritton
6bd211bb87 Same as r316022 (Fix hexadecimal escape codes in jail.conf(5)),
but do it right this time.

Reported by:	Kyle Evans <Kyle Evans>
MFC after:	3 days
2017-03-27 13:37:40 +00:00
Jamie Gritton
acf8ec5684 Fix hexadecimal escape codes in jail.conf(5).
PR:		218154
Submitted by:	Masahiro Konishi <mkonishi@sea.plala.or.jp>
MFC after:	3 days
2017-03-27 13:27:39 +00:00
Xin LI
760f2905be Don't assign rtjp twice.
Reported by:	clang static analyzer
MFC after:	2 weeks
2016-12-26 19:27:12 +00:00
Jamie Gritton
4c86c0fa98 Fix up the order in which jail creation processes are run, to preserve
the config file's order in the non-parallel-start case.

PR:		209112
MFC after:	3 days
2016-07-14 20:15:55 +00:00
Jamie Gritton
a8702c8383 typo
Submitted by:	Jimmy Olgeni
2016-05-01 16:48:03 +00:00
Pedro F. Giffuni
b5635ba0a2 usr.sbin: minor spelling fixes on comments.
No functional change.
2016-05-01 16:41:25 +00:00
Jamie Gritton
ab9604e1bb Clarify when happens when there is a "depend" parameter in jail.conf,
and how this affects the "jail_list" option in rc.conf.
2016-04-30 21:27:41 +00:00
Jamie Gritton
52a510ace9 Encapsulate SYSV IPC objects in jails. Define per-module parameters
sysvmsg, sysvsem, and sysvshm, with the following bahavior:

inherit: allow full access to the IPC primitives.  This is the same as
the current setup with allow.sysvipc is on.  Jails and the base system
can see (and moduly) each other's objects, which is generally considered
a bad thing (though may be useful in some circumstances).

disable: all no access, same as the current setup with allow.sysvipc off.

new: A jail may see use the IPC objects that it has created.  It also
gets its own IPC key namespace, so different jails may have their own
objects using the same key value.  The parent jail (or base system) can
see the jail's IPC objects, but not its keys.

PR:		48471
Submitted by:	based on work by kikuchan98@gmail.com
MFC after:	5 days
2016-04-25 17:06:50 +00:00
Jamie Gritton
5d6cb09dfc Note the existence of module-specific jail paramters, starting with the
linux.* parameters when linux emulation is loaded.

MFC after:	5 days
2016-04-25 17:01:13 +00:00
Jamie Gritton
a99d821068 Make jail(8) interpret escape codes in fstab the same as getfsent(3).
PR:		208663
MFC after:	3 days
2016-04-25 03:24:48 +00:00
Glen Barber
52259a98ad MFH
Sponsored by:	The FreeBSD Foundation
2016-03-02 16:14:46 +00:00
Bryan Drewery
bd18fd57db DIRDEPS_BUILD: Regenerate without local dependencies.
These are no longer needed after the recent 'beforebuild: depend' changes
and hooking DIRDEPS_BUILD into a subset of FAST_DEPEND which supports
skipping 'make depend'.

Sponsored by:	EMC / Isilon Storage Division
2016-02-24 17:20:11 +00:00
Glen Barber
0fe0fe112f MFH
Sponsored by:	The FreeBSD Foundation
2016-02-15 21:58:52 +00:00
Jamie Gritton
e94b881ba1 Remove man page references to rndassociates.com, which has been taken over
by a domain squatter.
2016-02-10 14:48:49 +00:00
Glen Barber
ed0d921874 Add a package for jail(8) and related utilities.
Sponsored by:	The FreeBSD Foundation
2016-01-20 17:07:13 +00:00
Jamie Gritton
5160b6a7e6 Don't bother checking an ip[46].addr netmask/prefixlen. This is already
handled by ifconfig, and it was doing it wrong when the paramater included
extra ifconfig options.

PR:		205926
MFC after:	5 days
2016-01-16 22:32:57 +00:00
Jamie Gritton
fcc43d065a Clear errno before calling getpw*. 2016-01-16 18:13:28 +00:00
Bryan Drewery
cf990407e1 Update dependencies after r291406 added libelf to libkvm.
Unfortunately filemon/meta mode tracks all indirect dependencies here
since ld(1) is reading libelf when linking in libkvm.  Churn would be
reduced if this was able to be limited to direct dependencies.

Sponsored by:	EMC / Isilon Storage Division
2015-12-01 05:18:48 +00:00
Eitan Adler
463a577b27 Fix a ton of speelling errors
arc lint is helpful

Reviewed By: allanjude, wblock, #manpages, chris@bsdjunk.com
Differential Revision: https://reviews.freebsd.org/D3337
2015-10-21 05:37:09 +00:00
Dru Lavigne
7ec72d484f Fix transposed words in man page.
PR: 201752
Reviewed by: bcr
MFC after: 3 days
Sponsored by: Essen FreeBSD Hackathon
2015-07-25 11:10:49 +00:00
Marcelo Araujo
f19e47d691 Add support to the jail framework to be able to mount linsysfs(5) and
linprocfs(5).

Differential Revision:	D2846
Submitted by:		Nikolai Lifanov <lifanov@mail.lifanov.com>
Reviewed by:		jamie
2015-07-19 08:52:35 +00:00
Hiroki Sato
64bb8a3881 Implement PF_IMMUTABLE flag and apply it to "name" and "jid" in
jail.conf parameters.  This flag disallows redefinition of the parameter.

"name" and/or "jid" are automatically defined in jail.conf by using
the jail names at the front of jail parameter definitions.  However,
one could override them by using a variable with the same name like
$name = "foo".  This confused the parser and could end up with SIGSEGV.

Note that this change also affects a case when all of parameters are
defined in the command line arguments, not in jail.conf.  Specifically,
"jail -c name=j1 name=j2" no longer works.  This should be harmless.

PR:		196574
Reviewed by:	jamie
Differential Revision:	https://reviews.freebsd.org/D3017
2015-07-08 16:37:48 +00:00
Hiroki Sato
882efc9ac2 Fix offset calculation in variable substitution
in jail.conf.  The following did not work correctly:

 A="A_${B}_C_${D}"
 B="BBBBB"
 D="DDDD_${E}_FFFFF"
 E="EEEEE"

PR:		189139
Reviewed by:	jamie
Differential Revision:	https://reviews.freebsd.org/D3018
2015-07-08 00:51:53 +00:00
Simon J. Gerraty
ccfb965433 Add META_MODE support.
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.

Still need to add real targets under targets/ to build packages.

Differential Revision:       D2796
Reviewed by: brooks imp
2015-06-13 19:20:56 +00:00
Simon J. Gerraty
44d314f704 dirdeps.mk now sets DEP_RELDIR 2015-06-08 23:35:17 +00:00
Simon J. Gerraty
98e0ffaefb Merge sync of head 2015-05-27 01:19:58 +00:00
Joel Dahl
952364486a Fix minor mdoc issues. 2015-04-24 14:36:06 +00:00
Allan Jude
946ea17f0c Fix typo in jail(8) man page
PR:		198790
Differential Revision:	https://reviews.freebsd.org/D2111
Submitted by:	Jimmy Olgeni
Approved by:	wblock (mentor)
Sponsored by:	ScaleEngine Inc.
2015-03-22 20:38:28 +00:00
Ian Lepore
b96bd95b85 Allow the kern.osrelease and kern.osreldate sysctl values to be set in a
jail's creation parameters.  This allows the kernel version to be reliably
spoofed within the jail whether examined directly with sysctl or
indirectly with the uname -r and -K options.

The values can only be set at jail creation time, to eliminate the need
for any locking when accessing the values via sysctl.

The overridden values are inherited by nested jails (unless the config for
the nested jails also overrides the values).

There is no sanity or range checking, other than disallowing an empty
release string or a zero release date, by design.  The system
administrator is trusted to set sane values.  Setting values that are
newer than the actual running kernel will likely cause compatibility
problems.

Differential Revision:	https://reviews.freebsd.org/D1948
Relnotes:	yes
2015-02-27 16:28:55 +00:00
Jamie Gritton
07a7869fb2 Add mount.procfs jail parameter, so procfs can be mounted when a prison's
root is in its fstab.

Also fix a typo while I'm at it.

PR:		197237 197066
MFC after:	3 days
2015-02-06 17:54:53 +00:00
Jamie Gritton
464aad1407 Add allow.mount.fdescfs jail flag.
PR:		192951
Submitted by:	ruben@verweg.com
MFC after:	3 days
2015-01-28 21:08:09 +00:00
Joel Dahl
914f6e6290 mdoc: sort SEE ALSO. 2014-12-26 21:56:23 +00:00
Jamie Gritton
eb28afe422 Setgid before running a command as a specified user. Previously only
initgroups(3) was called, what isn't quite enough.  This brings jail(8)
in line with jexec(8), which was already doing the right thing.

PR:		195984
MFC after:	1 week
2014-12-18 18:10:39 +00:00