Bug 1285801
| Summary: | SELinux is preventing monitor-get-edi from 'mmap_zero' accesses on the memprotect Unknown. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Jiri Canderle <jcanderl> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED DUPLICATE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 23 | CC: | dominick.grift, dwalsh, lvrabec, mgrepl, plautrba |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:d586e195dfb8e48e1e83e57510e42cb9d80619223eeb81e7d1af68d92dc63f3e;VARIANT_ID=workstation; | ||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-11-26 15:10:17 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: | |||
*** This bug has been marked as a duplicate of bug 742691 *** |
Description of problem: I have run monitor-get-edid to figure out connected monitor properties as root. SELinux is preventing monitor-get-edi from 'mmap_zero' accesses on the memprotect Unknown. ***** Plugin mmap_zero (53.1 confidence) suggests ************************* If you do not think monitor-get-edi should need to mmap low memory in the kernel. Then you may be under attack by a hacker, this is a very dangerous access. Do contact your security administrator and report this issue. ***** Plugin catchall_boolean (42.6 confidence) suggests ****************** If you want to allow mmap to low allowed Then you must tell SELinux about this by enabling the 'mmap_low_allowed' boolean. You can read 'None' man page for more details. Do setsebool -P mmap_low_allowed 1 ***** Plugin catchall (5.76 confidence) suggests ************************** If you believe that monitor-get-edi should be allowed mmap_zero access on the Unknown memprotect 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: # grep monitor-get-edi /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Context unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1 023 Target Objects Unknown [ memprotect ] Source monitor-get-edi Source Path monitor-get-edi Port <Unknown> Host (removed) Source RPM Packages Target RPM Packages Policy RPM selinux-policy-3.13.1-154.fc23.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name (removed) Platform Linux (removed) 4.2.6-300.fc23.x86_64 #1 SMP Tue Nov 10 19:32:21 UTC 2015 x86_64 x86_64 Alert Count 3 First Seen 2015-11-26 14:16:01 CET Last Seen 2015-11-26 14:16:37 CET Local ID bc7ae8b4-d350-42cc-baa9-fa62238c9458 Raw Audit Messages type=AVC msg=audit(1448543797.490:994): avc: denied { mmap_zero } for pid=27978 comm="monitor-get-edi" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=memprotect permissive=0 Hash: monitor-get-edi,unconfined_t,unconfined_t,memprotect,mmap_zero Version-Release number of selected component: selinux-policy-3.13.1-154.fc23.noarch Additional info: reporter: libreport-2.6.3 hashmarkername: setroubleshoot kernel: 4.2.6-300.fc23.x86_64 type: libreport Potential duplicate: bug 742691