Bug 1401770

Summary: SELinux is preventing dmesg from 'syslog_read' accesses on the system Unknown.
Product: [Fedora] Fedora Reporter: Mikhail <mikhail.v.gavrilov>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 25CC: berend.de.schouwer, dominick.grift, dwalsh, lvrabec, me.arielwilson, mgrepl, plautrba, pmoore, ssekidde, tcfxfzoi
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:1c9cdea622720c4d76bfa0cf3d4424502f009d5ec46fbcfa93364639aa92e4b9;VARIANT_ID=workstation;
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2016-12-06 12:50:51 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Mikhail 2016-12-06 03:12:56 UTC
Description of problem:
SELinux is preventing dmesg from 'syslog_read' accesses on the system Unknown.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that dmesg should be allowed syslog_read access on the Unknown system 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 'dmesg' --raw | audit2allow -M my-dmesg
# semodule -X 300 -i my-dmesg.pp

Additional Information:
Source Context                system_u:system_r:container_t:s0:c589,c604
Target Context                system_u:system_r:kernel_t:s0
Target Objects                Unknown [ system ]
Source                        dmesg
Source Path                   dmesg
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-225.fc25.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.8.11-300.fc25.x86_64 #1 SMP Mon
                              Nov 28 18:24:51 UTC 2016 x86_64 x86_64
Alert Count                   2
First Seen                    2016-12-05 20:17:21 +05
Last Seen                     2016-12-05 20:17:21 +05
Local ID                      75b95615-173c-4816-8afb-a7dfe6960c3a

Raw Audit Messages
type=AVC msg=audit(1480951041.222:1003): avc:  denied  { syslog_read } for  pid=27622 comm="dmesg" scontext=system_u:system_r:container_t:s0:c589,c604 tcontext=system_u:system_r:kernel_t:s0 tclass=system permissive=0


Hash: dmesg,container_t,kernel_t,system,syslog_read

Version-Release number of selected component:
selinux-policy-3.13.1-225.fc25.noarch

Additional info:
reporter:       libreport-2.8.0
hashmarkername: setroubleshoot
kernel:         4.8.11-300.fc25.x86_64
type:           libreport

Comment 1 Daniel Walsh 2016-12-06 12:50:51 UTC
You should not be allowed to read the system log while sitting inside of a container. You would need to turn SELinux off inside of the container to allow this.

Comment 2 Berend De Schouwer 2017-01-05 09:41:08 UTC
Description of problem:
Running a docker

In particular, a docker to run Ansible tests (ansible itself unit tests, when developing ansible)

Version-Release number of selected component:
selinux-policy-3.13.1-225.3.fc25.noarch

Additional info:
reporter:       libreport-2.8.0
hashmarkername: setroubleshoot
kernel:         4.8.14-300.fc25.x86_64
type:           libreport

Comment 3 Daniel Walsh 2017-01-05 13:53:57 UTC
They you should run a privileged container.

Comment 4 Zdenek Pytela 2019-03-18 09:47:52 UTC
*** Bug 1689670 has been marked as a duplicate of this bug. ***

Comment 5 jonathan alex 2022-04-07 07:01:54 UTC Comment hidden (spam)
Comment 6 mondyrose 2022-04-09 09:40:10 UTC Comment hidden (spam)
Comment 7 Sophiekells 2022-04-13 07:05:50 UTC Comment hidden (spam)
Comment 8 russelltitus 2022-08-22 13:59:33 UTC Comment hidden (spam)
Comment 9 Michel 2022-08-28 09:30:24 UTC Comment hidden (spam)
Comment 10 tineclerk 2022-09-27 06:30:24 UTC Comment hidden (spam)
Comment 11 Smith Dave 2022-10-08 11:05:41 UTC Comment hidden (spam)
Comment 12 callumbryne3 2022-11-29 10:59:22 UTC Comment hidden (spam)