| Summary: | SELinux is preventing dbus-daemon from 'read, write' accesses on the chr_file /dev/pts/ptmx. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Paul Alesius <Paul> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | low | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 23 | CC: | dominick.grift, dwalsh, lvrabec, mgrepl, plautrba |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-04-11 07:38:11 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: | |
For some reason, relabeling /dev/pts/ptmx doesn't work either, it will only work by allowing the above AVC. Closing for further debugging. |
## Description of problem: Trying to login to a systemd-nspawn container using machinectl login <container> ## Version-Release number of selected component (if applicable): selinux-policy.noarch 3.13.1-158.12.fc23 @updates selinux-policy-targeted.noarch 3.13.1-158.12.fc23 @updates ## How reproducible: always ## Steps to Reproduce: 1.machinectl login <my-nspawn-machine> ## Actual results: -> Failed to get machine PTY: Message recipient disconnected from message bus without replying Because "it" (machinectl? systemd? nspawn?) tries to access /dev/pts/ptmx instead of /dev/ptmx ls -lZ /dev/ptmx /dev/pts/ptmx: -> root tty system_u:object_r:ptmx_t:s0 /dev/ptmx -> root root system_u:object_r:devpts_t:s0 /dev/pts/ptmx semanage fcontext -l | grep ptmx: -> /dev/ptmx character device system_u:object_r:ptmx_t:s0 ## Expected results: Login prompt to the container to show up. ## Additional info: Source Context system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 Target Context system_u:object_r:devpts_t:s0 Target Objects /dev/pts/ptmx [ chr_file ] Source dbus-daemon Source Path dbus-daemon Port <Unknown> Host <Unknown> Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.13.1-158.12.fc23.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name hypervisor.unnsvc.dev Platform Linux hypervisor.unnsvc.dev 4.5.0 #1 SMP Fri Apr 8 02:31:15 CEST 2016 x86_64 x86_64 Alert Count 3 First Seen 2016-04-11 07:03:15 CEST Last Seen 2016-04-11 07:03:33 CEST Local ID bd6e884e-e862-4a9c-b030-4498d7cac5ba Raw Audit Messages type=AVC msg=audit(1460351013.405:190): avc: denied { read write } for pid=746 comm="dbus-daemon" path="/dev/pts/ptmx" dev="devpts" ino=2 scontext=system_u:system_r:system_dbusd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:devpts_t:s0 tclass=chr_file permissive=0 Hash: dbus-daemon,system_dbusd_t,devpts_t,chr_file,read,write ## The .te file it generates from the auditd.log: module dbusd-ptmx 1.0; require { type devpts_t; type system_dbusd_t; class chr_file { write read }; } #============= system_dbusd_t ============== allow system_dbusd_t devpts_t:chr_file { write read };