I have a case where I'm labeling media with my own types to control
access. But that is requiring that I relabel from iso9660_t to my
own type. This interface allows that relabel.
type=AVC msg=audit(1551621984.372:919): avc: denied { relabelfrom } for pid=9717 comm="mount" scontext=staff_u:staff_r:mymedia_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:iso9660_t:s0 tclass=filesystem permissive=0
Signed-off-by: Dave Sugar <dsugar@tresys.com>
The cgroup directory under /sys/fs/cgroup contains a number of
pseudo-filesystems for each cgroup as well as two symbolic links for the
cpu and cpuacct groups, which were legacy symbolic links to the
cpu,cpuacct group.
These rules allow systemd to relabel these symbolic links from tmpfs_t
to their proper context, or otherwise denials will be printed for nearly
all systemd operation involving cgroups.
This change only grants systemd the possibility to relabel the
files. The actual relabelling needs to be done by systemd. The
accompanying change (commit 8739f23) will be released with systemd v236.
systemd relabels everything in /dev and /run after loading the policy.
In these directories there is a socket file for udev, /run/udev/control,
which is not allowed to be relabelled from tmpfs_t:
avc: denied { relabelfrom } for pid=1 comm="systemd"
name="control" dev="tmpfs" ino=7027
scontext=system_u:system_r:init_t tcontext=system_u:object_r:tmpfs_t
tclass=sock_file permissive=1
avc: denied { relabelto } for pid=1 comm="systemd" name="control"
dev="tmpfs" ino=7027 scontext=system_u:system_r:init_t
tcontext=system_u:object_r:udev_var_run_t tclass=sock_file
permissive=1
/run/tmpfiles.d directory (used by systemd-tmpfiles service) is also
relabelled.
This patch adds a lot of policy that is needed to setup an initramfs and grub
on Debian nowadays.
Also changed a comment about ia64 to correctly mention EFI.
This patch adds an interface to manage systemd_passwd_var_run_t symlinks that
I'll add another patch to use shortly.
It has a number of changes needed by systemd_logind_t to set permissions for
local logins.
It has some more permissions that systemd_machined_t needs, I don't think it's
everything that systemd_machined_t needs but it's a start.
It has some changes for udev_t for systemd-udevd.
This patch doesn't do everything that is needed to have systemd-nspawn work.
But it does everything that is needed and which I have written in a clear and
uncontroversial way. I think it's best to get this upstream now and then
either have a separate discussion about the more difficult issues, or wait
until I devise a way of solving those problems that's not too hacky.
Who knows, maybe someone else will devise a brilliant solution to the remaining
issues after this is accepted upstream.
Also there's a tiny patch for systemd_machined_t that is required by
systemd_nspawn_t.
Description: systemd-nspawn
Author: Russell Coker <russell@coker.com.au>
Last-Update: 2017-03-29
userdomains should not alter labels of kernel pseudo filesystems, but allowing setfiles/restorecon(d) to check the contexts helps spotting incorrect labels
This patch adds missing permissions in the kernel module that prevent
to run it without the unconfined module.
This second version improves the comment section of new interfaces:
"Domain" is replaced by "Domain allowed access".
Signed-off-by: Guido Trentalancia <guido@trentalancia.net>
Interface fs_register_binary_executable_type allow registering
interpreters using a filesystem monted on /proc/sys/fs/binfmt_misc. In
order to access this filesystem, the process needs to search every
parent directory of the mountpoint.
Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
When reading or managing noxattr fs files or symbolic links, also
let the user list noxattr fs directories.
This patch should be applied after the following one:
http://oss.tresys.com/pipermail/refpolicy/2016-October/008539.html
"Let users read/manage symlinks on fs that do not support xattr"
posted on Sat, 29 Oct 2016 15:39:46 UTC.
Signed-off-by: Guido Trentalancia <guido@trentalancia.net>
Let unprivileged and administrative users read symbolic links on
filesystems that do not support extended attributes (xattr) such
as cdroms, FAT, NTFS and so on.
Signed-off-by: Guido Trentalancia <guido@trentalancia.net>
systemd creates a new network namespace for services which are using
PrivateNetwork=yes.
In the implementation, systemd uses a socketpair as a storage buffer for
the namespace reference file descriptor (c.f.
https://github.com/systemd/systemd/blob/v228/src/core/namespace.c#L660).
One end of this socketpair is locked (hence the need of "lock" access to
self:unix_dgram_socket for init_t) while systemd opens
/proc/self/ns/net, which lives in nsfs.
While at it, add filesystem_type attribute to nsfs_t.
Move cgroup_t declarations from kernel.te to filesystem.te
Redo cgroup interfaces in filesystem.if
Add file context specification for /cgroup mountpoint to filesystem.fc
Signed-off-by: Dominick Grift <domg472@gmail.com>
Signed-off-by: Chris PeBenito <cpebenito@tresys.com>
