| commit | 7385004162b22554fa651ae521c8bc67bf4b3524 | [log] [tgz] |
|---|---|---|
| author | Christian Göttsche <cgzones@googlemail.com> | Tue Jan 25 14:50:22 2022 +0100 |
| committer | James Carter <jwcart2@gmail.com> | Thu Jan 27 09:52:10 2022 -0500 |
| tree | 5c30335eb7bf9b3189d403aa1c7fc022813c020a | |
| parent | 42a8dc46a7a05b6e9fb62f081815d25e65df1817 [diff] |
libsepol: invert only valid range of role bitmap The length of an ebitmap is the current highest allocated (not set) bit and always a multiple of MAPTYPE (= 64). The role ebitmap should only have valid role bits set, even after inverting. The length might be smaller than the maximum number of defined roles leading to non defined role bits set afterwards. Only invert up to the number of roles defined instead the full ebitmap length, similar to type_set_expand(). This also avoids timeouts on an invalid huge highbit set, since the ebitmap has not been validated yet, on which inverting will take excessive amount of memory and time, found by oss-fuzz (#43709). Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
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SELinux libraries and tools are packaged in several Linux distributions:
Build dependencies on Fedora:
# For C libraries and programs dnf install \ audit-libs-devel \ bison \ bzip2-devel \ CUnit-devel \ diffutils \ flex \ gcc \ gettext \ glib2-devel \ make \ libcap-devel \ libcap-ng-devel \ pam-devel \ pcre2-devel \ xmlto # For Python and Ruby bindings dnf install \ python3-devel \ ruby-devel \ swig
Build dependencies on Debian:
# For C libraries and programs apt-get install --no-install-recommends --no-install-suggests \ bison \ flex \ gawk \ gcc \ gettext \ make \ libaudit-dev \ libbz2-dev \ libcap-dev \ libcap-ng-dev \ libcunit1-dev \ libglib2.0-dev \ libpcre2-dev \ pkgconf \ python3 \ python3-distutils \ systemd \ xmlto # For Python and Ruby bindings apt-get install --no-install-recommends --no-install-suggests \ python3-dev \ ruby-dev \ swig
To build and install everything under a private directory, run:
make clean distclean make DESTDIR=~/obj install install-rubywrap install-pywrap
On Debian PYTHON_SETUP_ARGS=--install-layout=deb needs to be set when installing the python wrappers in order to create the correct python directory structure.
To run tests with the built libraries and programs, several paths (relative to $DESTDIR) need to be added to variables $LD_LIBRARY_PATH, $PATH and $PYTHONPATH. This can be done using ./scripts/env_use_destdir:
DESTDIR=~/obj ./scripts/env_use_destdir make test
Some tests require the reference policy to be installed (for example in python/sepolgen). In order to run these ones, instructions similar to the ones in section install of ./.travis.yml can be executed.
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.
Setting CFLAGS during the make process will cause the omission of many defaults. While the project strives to provide a reasonable set of default flags, custom CFLAGS could break the build, or have other undesired changes on the build output. Thus, be very careful when setting CFLAGS. CFLAGS that are encouraged to be set when overriding are:
To install libsepol on macOS (mainly for policy analysis):
cd libsepol; make PREFIX=/usr/local install
This requires GNU coreutils:
brew install coreutils