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When generating file_contexts.homedirs, libsemanage enumerates the users
on the system and tries to find misconfiguration issues by comparing
their home directories with file contexts defined in the policy. The
comparison is done by fcontext_matches().
Currently this function only operates on file contexts with type ALL,
but it makes sense to also operate on the DIR ones, as a comment states
in the function.
For example on a system with the following entry in /etc/passwd:
mytestservice❌2000💯:/var/lib/mytestservice/dir:/bin/bash
and with the following file context definition:
/var/lib/mytestservice/.* -d gen_context(system_u:object_r:var_lib_t,s0)
"semodule -B" now shows the following warning:
libsemanage.get_home_dirs: mytestservice homedir
/var/lib/mytestservice/dir or its parent directory conflicts with a
file context already specified in the policy. This usually
indicates an incorrectly defined system account. If it is a system
account please make sure its uid is less than 1000 or greater than
60000 or its login shell is /sbin/nologin.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
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 xmlto redhat-rpm-config 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.