hostnamectl updates /etc/hostname.
This change is setting up a private type for the file /etc/hostname (was etc_t)
and granting hostnamectl permission to edit this file. Note that hostnamectl
is initially creating a new file .#hostname????? which is why the create
permissions are requied.
type=AVC msg=audit(1547039052.041:563): avc: denied { write } for pid=7564 comm="systemd-hostnam" name="etc" dev="dm-1" ino=101 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1547039052.041:563): avc: denied { add_name } for pid=7564 comm="systemd-hostnam" name=".#hostnamezyqZ9t" scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1547039052.041:563): avc: denied { create } for pid=7564 comm="systemd-hostnam" name=".#hostnamezyqZ9t" scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=file permissive=1
type=AVC msg=audit(1547039052.041:563): avc: denied { write } for pid=7564 comm="systemd-hostnam" path="/etc/.#hostnamezyqZ9t" dev="dm-1" ino=1094726 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=file permissive=1
type=SYSCALL msg=audit(1547039052.041:563): arch=c000003e syscall=2 success=yes exit=8 a0=560d0bba34b0 a1=800c2 a2=180 a3=5c35f14c items=2 ppid=1 pid=7564 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-hostnam" exe="/usr/lib/systemd/systemd-hostnamed" subj=system_u:system_r:systemd_hostnamed_t:s0 key=(null)
type=AVC msg=audit(1547039052.041:564): avc: denied { setattr } for pid=7564 comm="systemd-hostnam" name=".#hostnamezyqZ9t" dev="dm-1" ino=1094726 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=file permissive=1
type=SYSCALL msg=audit(1547039052.041:564): arch=c000003e syscall=91 success=yes exit=0 a0=8 a1=1a4 a2=fbad2484 a3=24 items=1 ppid=1 pid=7564 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="systemd-hostnam" exe="/usr/lib/systemd/systemd-hostnamed" subj=system_u:system_r:systemd_hostnamed_t:s0 key=(null)
type=AVC msg=audit(1547039052.041:565): avc: denied { remove_name } for pid=7564 comm="systemd-hostnam" name=".#hostnamezyqZ9t" dev="dm-1" ino=1094726 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1547039052.041:565): avc: denied { rename } for pid=7564 comm="systemd-hostnam" name=".#hostnamezyqZ9t" dev="dm-1" ino=1094726 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=file permissive=1
type=AVC msg=audit(1547039052.041:565): avc: denied { unlink } for pid=7564 comm="systemd-hostnam" name="hostname" dev="dm-1" ino=1094712 scontext=system_u:system_r:systemd_hostnamed_t:s0 tcontext=system_u:object_r:etc_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <dsugar@xxxxxxxxxx>
---
policy/modules/system/systemd.fc | 1 +
policy/modules/system/systemd.te | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/policy/modules/system/systemd.fc b/policy/modules/system/systemd.fc
index eefcfaf1..2277fc1e 100644
--- a/policy/modules/system/systemd.fc
+++ b/policy/modules/system/systemd.fc
@@ -1,3 +1,4 @@
+/etc/hostname -- gen_context(system_u:object_r:hostname_etc_t,s0)
/etc/udev/hwdb\.bin -- gen_context(system_u:object_r:systemd_hwdb_t,s0)
/run/log/journal(/.*)? gen_context(system_u:object_r:systemd_journal_t,s0)
diff --git a/policy/modules/system/systemd.te b/policy/modules/system/systemd.te
index f5f7dc1b..3704b756 100644
--- a/policy/modules/system/systemd.te
+++ b/policy/modules/system/systemd.te
@@ -77,6 +77,9 @@ type systemd_detect_virt_t;
type systemd_detect_virt_exec_t;
init_daemon_domain(systemd_detect_virt_t, systemd_detect_virt_exec_t)
+type hostname_etc_t;
+files_config_file(hostname_etc_t)
+
type systemd_hostnamed_t;
type systemd_hostnamed_exec_t;
init_daemon_domain(systemd_hostnamed_t, systemd_hostnamed_exec_t)
@@ -317,10 +320,13 @@ seutil_search_default_contexts(systemd_coredump_t)
# Hostnamed policy
#
+allow systemd_hostnamed_t hostname_etc_t:file manage_file_perms;
+
kernel_read_kernel_sysctls(systemd_hostnamed_t)
dev_read_sysfs(systemd_hostnamed_t)
+files_etc_filetrans(systemd_hostnamed_t, hostname_etc_t, file)
files_read_etc_files(systemd_hostnamed_t)
seutil_read_file_contexts(systemd_hostnamed_t)
--
2.20.1
