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Bug 1372962 - SELinux is preventing mount from 'unlink' accesses on the file utab.
Summary: SELinux is preventing mount from 'unlink' accesses on the file utab.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 25
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Lukas Vrabec
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: AcceptedBlocker abrt_hash:1f55b8ccf34...
Depends On:
Blocks: F25BetaBlocker
TreeView+ depends on / blocked
 
Reported: 2016-09-04 11:38 UTC by Mikhail
Modified: 2016-09-21 00:35 UTC (History)
8 users (show)

Fixed In Version: selinux-policy-3.13.1-214.fc25
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-09-21 00:35:53 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Mikhail 2016-09-04 11:38:49 UTC 
Description of problem:
SELinux is preventing mount from 'unlink' accesses on the file utab.

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

If you believe that mount should be allowed unlink access on the utab 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 'mount' --raw | audit2allow -M my-mount
# semodule -X 300 -i my-mount.pp

Additional Information:
Source Context                system_u:system_r:udisks2_t:s0
Target Context                system_u:object_r:mount_var_run_t:s0
Target Objects                utab [ file ]
Source                        mount
Source Path                   mount
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-211.fc25.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed)
                              4.8.0-0.rc4.git0.1.fc25.x86_64+debug #1 SMP Mon
                              Aug 29 19:06:48 UTC 2016 x86_64 x86_64
Alert Count                   1
First Seen                    2016-09-04 16:37:32 YEKT
Last Seen                     2016-09-04 16:37:32 YEKT
Local ID                      8dce032c-49bf-4110-aed3-7136b0cd4435

Raw Audit Messages
type=AVC msg=audit(1472989052.535:323): avc:  denied  { unlink } for  pid=12037 comm="mount" name="utab" dev="tmpfs" ino=1376 scontext=system_u:system_r:udisks2_t:s0 tcontext=system_u:object_r:mount_var_run_t:s0 tclass=file permissive=1


Hash: mount,udisks2_t,mount_var_run_t,file,unlink

Version-Release number of selected component:
selinux-policy-3.13.1-211.fc25.noarch

Additional info:
reporter:       libreport-2.7.2
hashmarkername: setroubleshoot
kernel:         4.8.0-0.rc4.git0.1.fc25.x86_64+debug
type:           libreport
Comment 1 pavel raur 2016-09-15 08:59:34 UTC 
Looks like the same problem. Happened when I tried to mount or unmount dvd.


SELinux is preventing mount from lock access on the file /run/mount/utab.lock.

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

If you believe that mount should be allowed lock access on the utab.lock 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 'mount' --raw | audit2allow -M my-mount
# semodule -X 300 -i my-mount.pp


Additional Information:
Source Context                system_u:system_r:udisks2_t:s0
Target Context                system_u:object_r:mount_var_run_t:s0
Target Objects                /run/mount/utab.lock [ file ]
Source                        mount
Source Path                   mount
Port                          <Unknown>
Host                          localhost.localdomain
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-211.fc25.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     dhcp-28-138.brq.redhat.com
Platform                      Linux dhcp-28-138.brq.redhat.com
                              4.8.0-0.rc6.git0.1.fc25.x86_64 #1 SMP Mon Sep 12
                              19:16:54 UTC 2016 x86_64 x86_64
Alert Count                   3
First Seen                    2016-09-15 10:20:10 CEST
Last Seen                     2016-09-15 10:24:08 CEST
Local ID                      db528475-0cfc-4c7a-9b83-23a06a35df20

Raw Audit Messages
type=AVC msg=audit(1473927848.573:296): avc:  denied  { lock } for  pid=2781 comm="mount" path="/run/mount/utab.lock" dev="tmpfs" ino=34245 scontext=system_u:system_r:udisks2_t:s0 tcontext=system_u:object_r:mount_var_run_t:s0 tclass=file permissive=1


Hash: mount,udisks2_t,mount_var_run_t,file,lock


I can't mount dvd and usbdisk if selinux is not in Permissive mode.

I propose this as betablocker, its violating this criteria:

"Automatic mounting of removable media on insertion must work in release-blocking desktops."
Comment 2 Lukas Vrabec 2016-09-15 10:53:01 UTC 
Fix:

https://github.com/fedora-selinux/selinux-policy/commit/f03db1257b911bc97dddb88b488a9b0df2b40848
Comment 3 Fedora Update System 2016-09-15 17:21:53 UTC 
selinux-policy-3.13.1-214.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2016-5f88bebc7c
Comment 4 Fedora Update System 2016-09-16 01:23:00 UTC 
selinux-policy-3.13.1-214.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-5f88bebc7c
Comment 5 Petr Schindler 2016-09-19 16:34:18 UTC 
Discussed at 2016-09-19 blocker review meeting: [1]. 

This bug was accepted as Beta blocker: This bug violates "Automatic mounting of removable media on insertion must work in release-blocking desktops."

[1] https://meetbot-raw.fedoraproject.org/fedora-blocker-review/2016-09-19/
Comment 6 Fedora Update System 2016-09-21 00:35:53 UTC 
selinux-policy-3.13.1-214.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
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