Bug 1581790

Summary: SELinux is preventing gnome-session-c from 'map' accesses on the chr_file /dev/nvidiactl.
Product: [Fedora] Fedora Reporter: Charles Barto <bartoc+fedora_bugs>
Component: selinux-policyAssignee: Lukas Vrabec <lvrabec>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 28CC: chref, dwalsh, jmetias, knutjbj, lvrabec, mgrepl, ncarboni, plautrba, pmoore, sct, wdh, William.Temple
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:856a72d8120a82e02d32d9752879944459d831ec002455af3a1d6dada6f244e8;VARIANT_ID=workstation;
Fixed In Version: selinux-policy-3.14.1-29.fc28 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-05-26 20:45:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Charles Barto 2018-05-23 15:48:33 UTC
Description of problem:
Just updated my system, looks like mabe a policy update or gnome shell update.
SELinux is preventing gnome-session-c from 'map' accesses on the chr_file /dev/nvidiactl.

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

If you believe that gnome-session-c should be allowed map access on the nvidiactl chr_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 'gnome-session-c' --raw | audit2allow -M my-gnomesessionc
# semodule -X 300 -i my-gnomesessionc.pp

Additional Information:
Source Context                system_u:system_r:xdm_t:s0-s0:c0.c1023
Target Context                system_u:object_r:xserver_misc_device_t:s0
Target Objects                /dev/nvidiactl [ chr_file ]
Source                        gnome-session-c
Source Path                   gnome-session-c
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.1-25.fc28.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 4.16.10-300.fc28.x86_64 #1 SMP Mon
                              May 21 14:41:48 UTC 2018 x86_64 x86_64
Alert Count                   31
First Seen                    2018-05-23 11:28:53 EDT
Last Seen                     2018-05-23 11:43:45 EDT
Local ID                      75b88966-a219-4879-80c2-33607bb7315f

Raw Audit Messages
type=AVC msg=audit(1527090225.505:324): avc:  denied  { map } for  pid=8137 comm="gnome-shell" path="/dev/nvidiactl" dev="devtmpfs" ino=31707 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:xserver_misc_device_t:s0 tclass=chr_file permissive=1


Hash: gnome-session-c,xdm_t,xserver_misc_device_t,chr_file,map

Version-Release number of selected component:
selinux-policy-3.14.1-25.fc28.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.16.10-300.fc28.x86_64
type:           libreport

Comment 1 Stephen Tweedie 2018-05-24 10:52:04 UTC
I'm also seeing this on the same selinux policy version (selinux-policy-targeted-3.14.1-25.fc28).  gdm fails to start and I get a boot-to-crash ("something went wrong" splash screen from gdm on boot).

"dnf downgrade selinux-policy-targeted" took me back to selinux-policy-targeted-3.14.1-21.fc28.noarch and I can boot to graphical login again.

Comment 2 Fedora Update System 2018-05-24 14:38:20 UTC
selinux-policy-3.14.1-29.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-a74875b364

Comment 3 William Temple 2018-05-25 15:12:43 UTC
I experienced this issue this morning, updating from Fedora 27 to Fedora 28 on my workstation PC. Same selinux-policy-targeted version.

NVIDIA driver version: nvidia-driver-390.59-1.fc28.x86_64

I'm using the package from negativo17.org, not the one hosted on RPMFusion.

$ getfattr -d -m ".*" /dev/nvidiactl
getfattr: Removing leading '/' from absolute path names
# file: dev/nvidiactl
security.selinux="system_u:object_r:xserver_misc_device_t:s0"

$ dnf repoquery -i nvidia-driver-390.59-1.fc28
Last metadata expiration check: 0:00:36 ago on Fri 25 May 2018 09:04:49 AM MDT.
Name         : nvidia-driver
Epoch        : 3
Version      : 390.59
Release      : 1.fc28
Arch         : x86_64
Size         : 2.5 M
Source       : nvidia-driver-390.59-1.fc28.src.rpm
Repo         : fedora-nvidia
Summary      : NVIDIA's proprietary display driver for NVIDIA graphic cards
URL          : http://www.nvidia.com/object/unix.html
License      : NVIDIA License
Description  : This package provides the most recent NVIDIA display driver which
             : allows for hardware accelerated rendering with recent NVIDIA
             : chipsets.
             : 
             : For the full product support list, please consult the release
             : notes for driver version 390.59.


I've worked around this by putting SELinux into permissive mode for the time being.

Comment 4 Fedora Update System 2018-05-25 18:43:58 UTC
selinux-policy-3.14.1-29.fc28 has been pushed to the Fedora 28 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-2018-a74875b364

Comment 5 Fedora Update System 2018-05-26 20:45:43 UTC
selinux-policy-3.14.1-29.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.