| History log of /src/sys/secmodel/bsd44/secmodel_bsd44.c |
| Revision | | Date | Author | Comments |
| 1.17 |
| 16-Mar-2020 |
pgoyette | Use the module subsystem's ability to process SYSCTL_SETUP() entries to
automate installation of sysctl nodes.
Note that there are still a number of device and pseudo-device modules
that create entries tied to individual device units, rather than to the
module itself. These are not changed.
|
| 1.16 |
| 25-Feb-2014 |
pooka | branches: 1.16.30;
Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.
Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.
|
| 1.15 |
| 04-Dec-2011 |
jym | branches: 1.15.6; 1.15.10;
Implement the register/deregister/evaluation API for secmodel(9). It
allows registration of callbacks that can be used later for
cross-secmodel "safe" communication.
When a secmodel wishes to know a property maintained by another
secmodel, it has to submit a request to it so the other secmodel can
proceed to evaluating the request. This is done through the
secmodel_eval(9) call; example:
bool isroot;
error = secmodel_eval("org.netbsd.secmodel.suser", "is-root",
cred, &isroot);
if (error == 0 && !isroot)
result = KAUTH_RESULT_DENY;
This one asks the suser module if the credentials are assumed to be root
when evaluated by suser module. If the module is present, it will
respond. If absent, the call will return an error.
Args and command are arbitrarily defined; it's up to the secmodel(9) to
document what it expects.
Typical example is securelevel testing: when someone wants to know
whether securelevel is raised above a certain level or not, the caller
has to request this property to the secmodel_securelevel(9) module.
Given that securelevel module may be absent from system's context (thus
making access to the global "securelevel" variable impossible or
unsafe), this API can cope with this absence and return an error.
We are using secmodel_eval(9) to implement a secmodel_extensions(9)
module, which plugs with the bsd44, suser and securelevel secmodels
to provide the logic behind curtain, usermount and user_set_cpu_affinity
modes, without adding hooks to traditional secmodels. This solves a
real issue with the current secmodel(9) code, as usermount or
user_set_cpu_affinity are not really tied to secmodel_suser(9).
The secmodel_eval(9) is also used to restrict security.models settings
when securelevel is above 0, through the "is-securelevel-above"
evaluation:
- curtain can be enabled any time, but cannot be disabled if
securelevel is above 0.
- usermount/user_set_cpu_affinity can be disabled any time, but cannot
be enabled if securelevel is above 0.
Regarding sysctl(7) entries:
curtain and usermount are now found under security.models.extensions
tree. The security.curtain and vfs.generic.usermount are still
accessible for backwards compat.
Documentation is incoming, I am proof-reading my writings.
Written by elad@, reviewed and tested (anita test + interact for rights
tests) by me. ok elad@.
See also
http://mail-index.netbsd.org/tech-security/2011/11/29/msg000422.html
XXX might consider va0 mapping too.
XXX Having a secmodel(9) specific printf (like aprint_*) for reporting
secmodel(9) errors might be a good idea, but I am not sure on how
to design such a function right now.
|
| 1.14 |
| 28-Nov-2011 |
jym | branches: 1.14.2;
The secmodel(9)s init, start and stop routines are managed by each
secmodel module(7), so there is no point in calling suser/securelevel
routines from bsd44. This leads to unwanted cross-secmodel dependencies.
Do not call secmodel_bsd44_init() from secmodel_overlay_init(). Doing so
resets all curtain/securelevel values, which is not really needed when
loading an overlay filter.
Remove the secmodel_register/deregister comments, they will be
implemented differently in an upcoming patch.
ok elad@ (via private mail).
|
| 1.13 |
| 02-Oct-2009 |
elad | branches: 1.13.12;
First part of secmodel cleanup and other misc. changes:
- Separate the suser part of the bsd44 secmodel into its own secmodel
and directory, pending even more cleanups. For revision history
purposes, the original location of the files was
src/sys/secmodel/bsd44/secmodel_bsd44_suser.c
src/sys/secmodel/bsd44/suser.h
- Add a man-page for secmodel_suser(9) and update the one for
secmodel_bsd44(9).
- Add a "secmodel" module class and use it. Userland program and
documentation updated.
- Manage secmodel count (nsecmodels) through the module framework.
This eliminates the need for secmodel_{,de}register() calls in
secmodel code.
- Prepare for secmodel modularization by adding relevant module bits.
The secmodels don't allow auto unload. The bsd44 secmodel depends
on the suser and securelevel secmodels. The overlay secmodel depends
on the bsd44 secmodel. As the module class is only cosmetic, and to
prevent ambiguity, the bsd44 and overlay secmodels are prefixed with
"secmodel_".
- Adapt the overlay secmodel to recent changes (mainly vnode scope).
- Stop using link-sets for the sysctl node(s) creation.
- Keep sysctl variables under nodes of their relevant secmodels. In
other words, don't create duplicates for the suser/securelevel
secmodels under the bsd44 secmodel, as the latter is merely used
for "grouping".
- For the suser and securelevel secmodels, "advertise presence" in
relevant sysctl nodes (sysctl.security.models.{suser,securelevel}).
- Get rid of the LKM preprocessor stuff.
- As secmodels are now modules, there's no need for an explicit call
to secmodel_start(); it's handled by the module framework. That
said, the module framework was adjusted to properly load secmodels
early during system startup.
- Adapt rump to changes: Instead of using empty stubs for securelevel,
simply use the suser secmodel. Also replace secmodel_start() with a
call to secmodel_suser_start().
- 5.99.20.
Testing was done on i386 ("release" build). Spearated module_init()
changes were tested on sparc and sparc64 as well by martin@ (thanks!).
Mailing list reference:
http://mail-index.netbsd.org/tech-kern/2009/09/25/msg006135.html
|
| 1.12 |
| 03-May-2009 |
elad | Move dovfsusermount to secmodel_bsd44, where it really belongs.
The secmodel code now creates the same knob in two places: both under the
secmodel itself, as well as the widely known location.
Mailing list references:
http://mail-index.netbsd.org/source-changes/2009/05/02/msg220641.html
http://mail-index.netbsd.org/tech-kern/2009/05/03/msg005015.html
|
| 1.11 |
| 21-Nov-2007 |
elad | branches: 1.11.18; 1.11.32;
Make securelevel a "secmodel" of its own.
While it's true that it's part of the traditional 4.4BSD security model,
there may come a time where a different "primary" security model used for
fine-grained privileges (ie., splitting root's responsibilities to various
privileges that can be assigned) may want to still have a securelevel
setting.
Idea from Daniel Carosone:
http://mail-index.netbsd.org/tech-security/2006/08/25/0001.html
The location of the removed files, for reference, was:
src/secmodel/bsd44/secmodel_bsd44_securelevel.c
src/secmodel/bsd44/securelevel.h
|
| 1.10 |
| 16-Jan-2007 |
elad | branches: 1.10.18; 1.10.20; 1.10.24; 1.10.26;
Use secmodel_register() and secmodel_deregister().
|
| 1.9 |
| 16-Jan-2007 |
elad | Implement secmodel_bsd44_start(), secmodel_bsd44_stop(), and
secmodel_overlay_start().
|
| 1.8 |
| 09-Jan-2007 |
elad | Remove advertising clause from all of my stuff.
|
| 1.7 |
| 02-Jan-2007 |
elad | Don't compile secmodel_start() if built as an LKM.
|
| 1.6 |
| 02-Jan-2007 |
elad | Make the securelevel contained by not exposing the variable that keeps
it outside secmodel_bsd44_securelevel.c.
|
| 1.5 |
| 31-Dec-2006 |
elad | Explicitly 'extern int securelevel;' in the sysctl(9) setup routine.
|
| 1.4 |
| 06-Oct-2006 |
elad | branches: 1.4.2; 1.4.6;
Create 'security.curtain' for documentation compatibility.
|
| 1.3 |
| 17-Sep-2006 |
elad | branches: 1.3.2;
Make the sysctl warnings on dmesg ("..returned 17") go away, after many
people didn't like them.
|
| 1.2 |
| 08-Sep-2006 |
elad | branches: 1.2.2;
Add __KERNEL_RCSID(), requested by and okay xtraeme@.
|
| 1.1 |
| 08-Sep-2006 |
elad | First take at security model abstraction.
- Add a few scopes to the kernel: system, network, and machdep.
- Add a few more actions/sub-actions (requests), and start using them as
opposed to the KAUTH_GENERIC_ISSUSER place-holders.
- Introduce a basic set of listeners that implement our "traditional"
security model, called "bsd44". This is the default (and only) model we
have at the moment.
- Update all relevant documentation.
- Add some code and docs to help folks who want to actually use this stuff:
* There's a sample overlay model, sitting on-top of "bsd44", for
fast experimenting with tweaking just a subset of an existing model.
This is pretty cool because it's *really* straightforward to do stuff
you had to use ugly hacks for until now...
* And of course, documentation describing how to do the above for quick
reference, including code samples.
All of these changes were tested for regressions using a Python-based
testsuite that will be (I hope) available soon via pkgsrc. Information
about the tests, and how to write new ones, can be found on:
http://kauth.linbsd.org/kauthwiki
NOTE FOR DEVELOPERS: *PLEASE* don't add any code that does any of the
following:
- Uses a KAUTH_GENERIC_ISSUSER kauth(9) request,
- Checks 'securelevel' directly,
- Checks a uid/gid directly.
(or if you feel you have to, contact me first)
This is still work in progress; It's far from being done, but now it'll
be a lot easier.
Relevant mailing list threads:
http://mail-index.netbsd.org/tech-security/2006/01/25/0011.html
http://mail-index.netbsd.org/tech-security/2006/03/24/0001.html
http://mail-index.netbsd.org/tech-security/2006/04/18/0000.html
http://mail-index.netbsd.org/tech-security/2006/05/15/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/01/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/25/0000.html
Many thanks to YAMAMOTO Takashi, Matt Thomas, and Christos Zoulas for help
stablizing kauth(9).
Full credit for the regression tests, making sure these changes didn't break
anything, goes to Matt Fleming and Jaime Fournier.
Happy birthday Randi! :)
|
| 1.2.2.2 |
| 14-Sep-2006 |
yamt | sync with head.
|
| 1.2.2.1 |
| 08-Sep-2006 |
yamt | file secmodel_bsd44.c was added on branch yamt-pdpolicy on 2006-09-14 12:32:00 +0000
|
| 1.3.2.1 |
| 22-Oct-2006 |
yamt | sync with head
|
| 1.4.6.4 |
| 07-Dec-2007 |
yamt | sync with head
|
| 1.4.6.3 |
| 26-Feb-2007 |
yamt | sync with head.
|
| 1.4.6.2 |
| 30-Dec-2006 |
yamt | sync with head.
|
| 1.4.6.1 |
| 06-Oct-2006 |
yamt | file secmodel_bsd44.c was added on branch yamt-lazymbuf on 2006-12-30 20:50:55 +0000
|
| 1.4.2.4 |
| 01-Feb-2007 |
ad | Sync with head.
|
| 1.4.2.3 |
| 12-Jan-2007 |
ad | Sync with head.
|
| 1.4.2.2 |
| 18-Nov-2006 |
ad | Sync with head.
|
| 1.4.2.1 |
| 06-Oct-2006 |
ad | file secmodel_bsd44.c was added on branch newlock2 on 2006-11-18 21:39:46 +0000
|
| 1.10.26.1 |
| 08-Dec-2007 |
mjf | Sync with HEAD.
|
| 1.10.24.1 |
| 22-Nov-2007 |
bouyer | Sync with HEAD
|
| 1.10.20.1 |
| 09-Jan-2008 |
matt | sync with HEAD
|
| 1.10.18.1 |
| 27-Nov-2007 |
joerg | Sync with HEAD. amd64 Xen support needs testing.
|
| 1.11.32.1 |
| 13-May-2009 |
jym | Sync with HEAD.
Commit is split, to avoid a "too many arguments" protocol error.
|
| 1.11.18.2 |
| 11-Mar-2010 |
yamt | sync with head
|
| 1.11.18.1 |
| 04-May-2009 |
yamt | sync with head.
|
| 1.13.12.2 |
| 22-May-2014 |
yamt | sync with head.
for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.
this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
|
| 1.13.12.1 |
| 17-Apr-2012 |
yamt | sync with head
|
| 1.14.2.1 |
| 18-Feb-2012 |
mrg | merge to -current.
|
| 1.15.10.1 |
| 18-May-2014 |
rmind | sync with head
|
| 1.15.6.1 |
| 20-Aug-2014 |
tls | Rebase to HEAD as of a few days ago.
|
| 1.16.30.1 |
| 08-Apr-2020 |
martin | Merge changes from current as of 20200406
|
