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Jeff Vander Stoep 1beb818f10 Fix extended permissions neverallow checking 
Commit 99fc177b "Add neverallow support for ioctl extended permissions"
first checks to see if the ioctl permission is granted, then checks to
see if the same source/target violates a neverallowed ioctl command.
Unfortunately this does not address the case where the ioctl permission
and extended permissions are granted on different attributes. Example,
the following will incorrectly cause a neverallow violation.

allow untrusted_app self:tcp_socket ioctl;
allowxperm domain domain:tcp_socket unpriv_sock_ioctls;
neverallowxperm untrusted_app domain:tcp_socket ~unpriv_sock_ioctls;

The fix is to enumerate over the source and target attributes when
looking for extended permission violations.

Note: The bug this addresses incorrectly asserts that a violation has
occurred. Actual neverallow violations are always caught.

Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Tested-by: William Roberts <william.c.roberts@intel.com>
2016-04-21 13:30:10 -04:00
checkpolicy Updated checkpolicy and policycoreutils ChangeLogs. 2016-04-12 10:44:29 -04:00
libselinux Updated libselinux ChangeLog. 2016-04-12 10:51:28 -04:00
libsemanage Update ChangeLog and VERSION for final release 2016-02-23 11:31:41 -05:00
libsepol Fix extended permissions neverallow checking 2016-04-21 13:30:10 -04:00
policycoreutils Updated checkpolicy and policycoreutils ChangeLogs. 2016-04-12 10:44:29 -04:00
scripts Add secilc to release script. 2015-03-31 12:41:28 -04:00
secilc Updated checkpolicy, libselinux, and secilc ChangeLogs. 2016-04-06 11:24:56 -04:00
sepolgen Updated sepolgen ChangeLog. 2016-03-25 14:15:34 -04:00
.gitignore global: gitignore: add a couple of more editor backup filetypes 2013-02-01 12:14:57 -05:00
Android.mk Add empty top level Android.mk / CleanSpec.mk files 2015-04-16 07:54:09 -04:00
CleanSpec.mk Add empty top level Android.mk / CleanSpec.mk files 2015-04-16 07:54:09 -04:00
Makefile libsepol: Move secilc out of libsepol 2015-03-31 12:31:38 -04:00
README Add further build dependencies. 2015-02-23 09:08:13 -05:00

README 

Please submit all bug reports and patches to selinux@tycho.nsa.gov.
Subscribe via selinux-join@tycho.nsa.gov.

Build dependencies on Fedora:
yum install audit-libs-devel bison bzip2-devel dbus-devel dbus-glib-devel flex flex-devel flex-static glib2-devel libcap-devel libcap-ng-devel pam-devel pcre-devel python-devel setools-devel swig ustr-devel

To build and install everything under a private directory, run:
make DESTDIR=~/obj install install-pywrap

To install as the default system libraries and binaries
(overwriting any previously installed ones - dangerous!),
on x86_64, run:
make LIBDIR=/usr/lib64 SHLIBDIR=/lib64 install install-pywrap relabel
or on x86 (32-bit), run:
make install install-pywrap relabel

This may render your system unusable if the upstream SELinux userspace
lacks library functions or other dependencies relied upon by your
distribution.  If it breaks, you get to keep both pieces.