Bug 1293744
| Summary: | SELinux denies acpid ability to run 'amixer' command | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | John W <jwdevel> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED EOL | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 22 | CC: | andreas, dominick.grift, dwalsh, jwdevel, lvrabec, mgrepl, plautrba |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2016-07-19 20:45:21 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed. |
User-Agent: Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0 Build Identifier: This issue was discussed on the selinux mailing list, subject line: "acpid cannot run 'amixer' due to SELinux issue?" (not in archives as of this writing). With the below local policy, it works as expected - I can, for instance, change the volume as a result of an acpi event (such as pressing a special key on my keyboard). The AVC denials from the audit log (note: some were hidden by "dontaudit": ------------ type=AVC msg=audit(1450643943.351:1071): avc: denied { read } for pid=17124 comm="amixer" name="controlC0" dev="devtmpfs" ino=13431 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=0 type=AVC msg=audit(1450645877.188:1497): avc: denied { open } for pid=24344 comm="amixer" path="/dev/snd/controlC0" dev="devtmpfs" ino=13431 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=0 type=AVC msg=audit(1450646449.252:1604): avc: denied { ioctl } for pid=26283 comm="amixer" path="/dev/snd/controlC0" dev="devtmpfs" ino=13431 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=0 type=AVC msg=audit(1450649676.646:2155): avc: denied { getattr } for pid=6407 comm="amixer" path="/usr/share/alsa/alsa.conf" dev="sda5" ino=2231592 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:alsa_etc_rw_t:s0 tclass=file permissive=0 type=AVC msg=audit(1450650193.910:2306): avc: denied { read } for pid=8370 comm="amixer" name="alsa.conf" dev="sda5" ino=2231592 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:alsa_etc_rw_t:s0 tclass=file permissive=0 type=AVC msg=audit(1450650622.897:2416): avc: denied { open } for pid=9899 comm="amixer" path="/usr/share/alsa/alsa.conf" dev="sda5" ino=2231592 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:alsa_etc_rw_t:s0 tclass=file permissive=0 type=AVC msg=audit(1450651145.995:2552): avc: denied { write } for pid=11799 comm="amixer" name="controlC0" dev="devtmpfs" ino=13431 scontext=system_u:system_r:apmd_t:s0 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=0 ------------ And here is the .te file that audit2allow created: ------------ module allow_acpid_access_sound 1.0; require { type alsa_etc_rw_t; type sound_device_t; type apmd_t; class chr_file { write read ioctl open }; class file { read getattr open }; } #============= apmd_t ============== allow apmd_t alsa_etc_rw_t:file { read getattr open }; allow apmd_t sound_device_t:chr_file write; allow apmd_t sound_device_t:chr_file { read ioctl open }; ------------ Reproducible: Always Steps to Reproduce: 1. Set up an acpi handler and corresponding script 2. Have that script try to use 'amixer' to alter the volume, etc. Actual Results: The script fails. Expected Results: The script succeeds, just as it does when SELinux is disabled ("setenforce 0")