Bug 1558121
| Summary: | not able to install vms on rhel 7.4 with selinux mls enabled | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Marian Jankular <mjankula> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED ERRATA | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | high | ||
| Version: | 7.4 | CC: | h0neyb4dgerdc, lvrabec, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-08-06 12:51:45 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1653106 | ||
I managed to find a solution.
The main issue was the following message
----
type=PROCTITLE msg=audit(04/08/2018 09:53:23.959:34954) : proctitle=/usr/sbin/libvirtd
type=SYSCALL msg=audit(04/08/2018 09:53:23.959:34954) : arch=x86_64 syscall=setxattr success=no exit=EPERM(Operation not permitted) a0=0x7f50b0001070 a1=0x7f50de458f8a a2=0x7f50b0007520 a3=0x2c items=0 ppid=1 pid=1266 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=libvirtd exe=/usr/sbin/libvirtd subj=system_u:system_r:virtd_t:s0-s15:c0.c1023 key=(null)
type=SELINUX_ERR msg=audit(04/08/2018 09:53:23.959:34954) : op=security_validate_transition seresult=denied oldcontext=system_u:object_r:qemu_var_run_t:s0 newcontext=system_u:object_r:virt_image_t:s0:c267,c728 taskcontext=system_u:system_r:virtd_t:s0-s15:c0.c1023 tclass=dir
----
I fixed it with the following custom module:
# custom_virt.te #############################
policy_module(custom_virt, 0.0.1)
gen_require(`
type virtd_t;
type qemu_var_run_t;
type virt_image_t;
type virtlogd_t;
')
# type=SELINUX_ERR msg=audit(04/07/2018 08:52:14.344:34391) :
# op=security_validate_transition
# seresult=denied
# oldcontext=system_u:object_r:qemu_var_run_t:s0
# newcontext=system_u:object_r:virt_image_t:s0:c92,c644
# taskcontext=system_u:system_r:virtd_t:s0-s15:c0.c1023
# tclass=dir
ifdef(`enable_mls',`
mls_file_upgrade(virtd_t)
')
allow virtd_t qemu_var_run_t:dir relabelfrom;
allow virtd_t virt_image_t:dir relabelto;
# ERROR Failed to recv file descriptor: Permission denied
# Removing disk 'fedora_server.img'
ifdef(`enable_mls',`
mls_file_write_to_clearance(virtd_t)
')
allow virtd_t virt_image_t:dir rmdir;
allow virtd_t virtlogd_t:fifo_file write;
# custom_virt.te #############################
##############################################
I hope this helps,
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:2127 |
Description of problem: not able to install vms on rhel 7.4 with selinux mls enabled Version-Release number of selected component (if applicable): How reproducible: always Steps to Reproduce: 1.install rhel 7.4 with kvm 2. enable mls 3. try to create vm Actual results: vm will be installed Expected results: -bash-4.2# chmod +x create-vm.sh -bash-4.2# ./create-vm.sh WARNING CDROM media does not print to the text console by default, so you likely will not see text install output. You might want to use --location. See the man page for examples of using --location with CDROM media Starting install... Allocating 'fedora_atomic.img' | 6.0 GB 00:00:00 ERROR unable to set security context 'system_u:object_r:virt_image_t:s0:c562,c828' on '/var/lib/libvirt/qemu/domain-1-fedora_atomic': Permission denied Removing disk 'fedora_atomic.img' | 0 B 00:00:00 Domain installation does not appear to have been successful. If it was, you can restart your domain by running: virsh --connect qemu:///system start fedora_atomic otherwise, please restart your installation. bash-4.2# ausearch -m AVC -ts boot -se virt ---- time->Mon Mar 19 16:38:38 2018 type=PROCTITLE msg=audit(1521477518.884:63): proctitle=2F7573722F62696E2F707974686F6E002F7573722F73686172652F6F766972742D67756573742D6167656E742F6F766972742D67756573742D6167656E742E7079 type=SYSCALL msg=audit(1521477518.884:63): arch=c000003e syscall=2 success=no exit=-13 a0=105c560 a1=2 a2=1ff a3=65722e6d6f632f73 items=0 ppid=1 pid=727 auid=4294967295 uid=175 gid=175 euid=175 suid=175 fsuid=175 egid=175 sgid=175 fsgid=175 tty=(none) ses=4294967295 comm="python" exe="/usr/bin/python2.7" subj=system_u:system_r:init_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1521477518.884:63): avc: denied { read write } for pid=727 comm="python" name="vport2p1" dev="devtmpfs" ino=1802 scontext=system_u:system_r:init_t:s0-s15:c0.c1023 tcontext=system_u:object_r:virtio_device_t:s0 tclass=chr_file ---- time->Mon Mar 19 16:44:01 2018 type=PROCTITLE msg=audit(1521477841.945:342): proctitle="/usr/sbin/libvirtd" type=SYSCALL msg=audit(1521477841.945:342): arch=c000003e syscall=188 success=no exit=-13 a0=7f7cf0002ed0 a1=7f7d1b376f8a a2=7f7cf0003540 a3=2c items=0 ppid=1 pid=1139 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="libvirtd" exe="/usr/sbin/libvirtd" subj=system_u:system_r:virtd_t:s0-s15:c0.c1023 key=(null) type=AVC msg=audit(1521477841.945:342): avc: denied { relabelfrom } for pid=1139 comm="libvirtd" name="domain-1-fedora_atomic" dev="dm-0" ino=101133452 scontext=system_u:system_r:virtd_t:s0-s15:c0.c1023 tcontext=system_u:object_r:virt_var_lib_t:s0 tclass=dir Mar 19 16:43:59 localhost libvirtd: 2018-03-19 16:43:59.378+0000: 1230: error : virNodeSuspendSupportsTarget:336 : internal error: Cannot probe for supported suspend types Mar 19 16:43:59 localhost libvirtd: 2018-03-19 16:43:59.379+0000: 1230: warning : virQEMUCapsInit:1143 : Failed to get host power management capabilities Mar 19 16:44:01 localhost libvirtd: 2018-03-19 16:44:01.946+0000: 1228: error : virSecuritySELinuxSetFileconHelper:1182 : unable to set security context 'system_u:object_r:virt_image_t:s0:c562,c828' on '/var/lib/libvirt/qemu/domain-1-fedora_atomic': Permission denied Mar 19 16:44:01 localhost systemd: Started Virtual machine log manager. Mar 19 16:44:01 localhost systemd: Starting Virtual machine log manager... Additional info: install is failing with virt-install and virt-manager as well