Bug 1577057
| Summary: | chronyc commands do not return values when run on the console with selinux enabled | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Sandeep MJ <sjayapra> |
| Component: | selinux-policy | Assignee: | Lukas Vrabec <lvrabec> |
| Status: | CLOSED DUPLICATE | QA Contact: | Milos Malik <mmalik> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.5 | CC: | lvrabec, mgrepl, mmalik, plautrba, ssekidde |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-05-20 22:34:16 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: | |||
I believe that BZ#1575002 and BZ#1577057 are duplicates. *** This bug has been marked as a duplicate of bug 1574418 *** |
Description of problem: "SELinux is preventing chronyc from 'read, write' accesses on the chr_file /dev/tty1" Running "chronyc sources" or "chronyc tracking" on the console of the VM does not yield results. Outputs shown as expected on running commands after ssh-ing in. Version-Release number of selected component (if applicable): selinux-policy-3.13.1-192.el7_5.3.noarch chrony-3.2-2.el7.x86_64 How reproducible: Always Steps to Reproduce: 1. Build VM 2. Access the console 3. Run "chronyc" commands Actual results: None Expected results: # chronyc sources 210 Number of sources = 4 MS Name/IP address Stratum Poll Reach LastRx Last sample =============================================================================== ^+ mika.470n.act.tsgnl.co 2 9 377 330 -1439us[-1439us] +/- 73ms ^* mice.spiderspace.co.uk 2 10 377 653 +2097us[+6988us] +/- 22ms ^+ ntp1.ds.network 2 10 377 629 -476us[ -476us] +/- 34ms ^- y.ns.gin.ntt.net 2 9 377 373 +8883us[+8883us] +/- 135ms Additional info: Disabling the don't audit rules: ~~~ # semodule -DB # sealert -l f5658a65-4e95-4a14-a831-7c70fe4ee471 SELinux is preventing chronyc from 'read, write' accesses on the chr_file /dev/tty1. ***** Plugin catchall_boolean (89.3 confidence) suggests ****************** If you want to allow all daemons the ability to read/write terminals Then you must tell SELinux about this by enabling the 'daemons_use_tty' boolean. Do setsebool -P daemons_use_tty 1 ***** Plugin catchall (11.6 confidence) suggests ************************** If you believe that chronyc should be allowed read write access on the tty1 chr_file by default. Then you should report this as a bug. You can generate a local policy module to allow this access. Do allow this access for now by executing: # ausearch -c 'chronyc' --raw | audit2allow -M my-chronyc # semodule -i my-chronyc.pp Additional Information: Source Context unconfined_u:unconfined_r:chronyc_t:s0-s0:c0.c1023 Target Context unconfined_u:object_r:user_tty_device_t:s0 Target Objects /dev/tty1 [ chr_file ] Source chronyc Source Path chronyc Port <Unknown> Host server.dns.com Source RPM Packages chrony-3.2-2.el7.x86_64 Target RPM Packages Policy RPM selinux-policy-3.13.1-192.el7_5.3.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name server.com Platform Linux server.dns.com 3.10.0-862.el7.x86_64 #1 SMP Wed Mar 21 18:14:51 EDT 2018 x86_64 x86_64 Alert Count 2 First Seen 2018-05-11 14:43:04 AEST Last Seen 2018-05-11 16:14:30 AEST Local ID f5658a65-4e95-4a14-a831-7c70fe4ee471 Raw Audit Messages type=AVC msg=audit(1526019270.702:390): avc: denied { read write } for pid=16036 comm="chronyc" path="/dev/tty1" dev="devtmpfs" ino=1043 scontext=unconfined_u:unconfined_r:chronyc_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_tty_device_t:s0 tclass=chr_file ~~~