Bug 1285801 - SELinux is preventing monitor-get-edi from 'mmap_zero' accesses on the memprotect Unknown.
SELinux is preventing monitor-get-edi from 'mmap_zero' accesses on the mempro...
Status: CLOSED DUPLICATE of bug 742691
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
x86_64 Unspecified
unspecified Severity unspecified
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Assigned To: Miroslav Grepl
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-11-26 08:58 EST by Jiri Canderle
Modified: 2015-11-26 10:10 EST (History)
5 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2015-11-26 10:10:17 EST
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Regression: ---
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Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Jiri Canderle 2015-11-26 08:58:05 EST
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.
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.
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.
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
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
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:

Additional info:
reporter:       libreport-2.6.3
hashmarkername: setroubleshoot
kernel:         4.2.6-300.fc23.x86_64
type:           libreport

Potential duplicate: bug 742691
Comment 1 Lukas Vrabec 2015-11-26 10:10:17 EST

*** This bug has been marked as a duplicate of bug 742691 ***

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