Since booleans are only set, not added/removed, we do not need to re-link
modules when setting them. We can instead just take the existing binary
policy and mutate it for the new values.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Also remove all internal uses by libselinux.
This requires deleting the old class/perm string lookup tables
and compatibility code for kernels that predate the /sys/fs/selinux/class
tree, i.e. Linux < 2.6.23.
This also fixes a longstanding bug in the stringrep code; it was allocating
NVECTORS (number of vectors in the legacy av_perm_to_string table, i.e.
the total number of legacy permissions) entries in the per-class perms array
rather than MAXVECTORS (the maximum number of permissions in any
access vector). Ho hum. I already fixed this in Android but forgot it
here.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Hi,
in https://github.com/TresysTechnology/refpolicy/pull/1 db_exception
and db_datatype were added to reference policy. This small patch
extends ability of label_db backend to work with these objects.
Regards.
Running "libsemanage/src/pywrap-test.py -v -F" gives following error:
Traceback (most recent call last):
File "pywrap-test.py", line 1139, in <module>
sys.exit(main())
File "pywrap-test.py", line 1121, in main
tests.run(sh)
File "pywrap-test.py", line 107, in run
self.test_writefcontext(handle)
File "pywrap-test.py", line 622, in test_writefcontext
if self.verbose: print "SEFContext type set: ", semanage.semanage_fcontext_get_type_str(fcon)
TypeError: in method 'semanage_fcontext_get_type_str', argument 1 of type 'int'
The argument of semanage_fcontext_get_type_str is the type recorded in
fcon and not fcon itself. This type can be retrieved with
semanage_fcontext_get_type.
If seunshare uses PR_SET_NO_NEW_PRIVS, which certain versions of
libcap-ng set, setexeccon will cause execve to fail. This also
makes setting selinux context the very last action taken by
seunshare prior to exec, as it may otherwise cause things to fail.
Note that this won't work without adjusting the system policy to
allow this use of setcurrent. This rule appears to work:
allow unconfined_t sandbox_t:process dyntransition;
although a better rule would probably relax the unconfined_t
restriction.
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
If you run selinux_init_load_policy() after a chroot/switch-root, it's
possible that your *previous* root loaded policy, but your *new* root
wants SELinux disabled.
We can't disable SELinux in this case, but we *do* need to make sure
it's permissive. Otherwise we may continue to enforce the old policy.
So, if seconfig = -1, but security_disable() fails, we set *enforce=0,
and then let the existing code handle the security_{get,set}enforce
stuff.
Once that's handled, exit with failure via "goto noload", as before.
Quote the component name.
Reorder the arguments to more closely align with the rule syntax.
Use a more descriptive text that will more clearly correspond to the original rule.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
This change was incorrect and can yield duplicate file name transition rules.
Revert it and look at converting the filename_trans list to a hashtab
as has already been done in the kernel in the future.
This reverts commit a29f6820c5.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
This is a program for displaying the contents of a binary policy file.
Change-Id: Iba94d6b13ac1abbc084da5631dc2bf4107e548d1
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
They do not retain the neverallow source information so we must
not assume that source_filename is set. Either need a new binary
module format if we want to propagate this information for modular
builds or get rid of binary modules.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
checkmodule -m and -b are fundamentally incompatible with each other,
so reject attempts to use them together.
Resolves
https://bugzilla.redhat.com/show_bug.cgi?id=1064603
Also fix the error message for -m with -U to use stderr.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
In attempting to enable building various part of Android with -Wall -Werror,
we found that the const security_context_t declarations in libselinux
are incorrect; const char * was intended, but const security_context_t
translates to char * const and triggers warnings on passing
const char * from the caller. Easiest fix is to replace them all with
const char *. And while we are at it, just get rid of all usage of
security_context_t itself as it adds no value - there is no true
encapsulation of the security context strings and callers already
directly use string functions on them. typedef left to permit
building legacy users until such a time as all are updated.
This is a port of Change-Id I2f9df7bb9f575f76024c3e5f5b660345da2931a7
from Android, augmented to deal with all of the other code in upstream
libselinux and updating the man pages too.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Eric Paris <eparis@redhat.com>
This new function allows a process to invoke helper programs with
a new execution context based on the filename, this is initially
intended for package managers so that they can easily execute
package scriptlets or maintainer scripts.
Base rpm_execcon() off this new function.
Signed-off-by: Guillem Jover <guillem@debian.org>
Failure to copy the entire av_decision structure, including the
flags field, would prevent preservation of the SELINUX_AVD_FLAGS_PERMISSIVE
flag and thus cause per-domain permissive to not be honored for userspace
permission checks.
Also ensure that we clear the entire structure.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Currently, the selevel/serange values (which are often set on a default
's0' value) are used for ports, users, contexts and logins. This breaks
non-MLS setups.
This patch will only call the necessary mls functions if mls is actually
enabled.
Signed-off-by: Sven Vermeulen <sven.vermeulen@siphos.be>
