Bug 2252637

Summary: SELinux is preventing gdk-pixbuf-thum from 'append' accesses on the unix_stream_socket unix_stream_socket.
Product: [Fedora] Fedora Reporter: Sam Tygier <samtygier>
Component: selinux-policyAssignee: Zdenek Pytela <zpytela>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 38CC: dwalsh, lvrabec, mmalik, nknazeko, omosnacek, pkoncity, samtygier, vmojzis, zpytela
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard: abrt_hash:33a4f956789de98501b1fc042804d472f91277f73d4e32ba862f7a37e27bcd94;VARIANT_ID=matecompiz;
Fixed In Version: selinux-policy-38.31-1.fc38 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2024-01-03 02:18:14 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:
Attachments:
Description Flags
File: description
none
File: os_info none

Description Sam Tygier 2023-12-03 09:55:05 UTC
Description of problem:
I think I get this when Caja is generating thumbnails.
SELinux is preventing gdk-pixbuf-thum from 'append' accesses on the unix_stream_socket unix_stream_socket.

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

If you believe that gdk-pixbuf-thum should be allowed append access on the unix_stream_socket unix_stream_socket 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 'gdk-pixbuf-thum' --raw | audit2allow -M my-gdkpixbufthum
# semodule -X 300 -i my-gdkpixbufthum.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023
Target Context                system_u:system_r:init_t:s0
Target Objects                unix_stream_socket [ unix_stream_socket ]
Source                        gdk-pixbuf-thum
Source Path                   gdk-pixbuf-thum
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
SELinux Policy RPM            selinux-policy-targeted-38.30-1.fc38.noarch
Local Policy RPM              selinux-policy-targeted-38.30-1.fc38.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 6.5.10-200.fc38.x86_64 #1 SMP
                              PREEMPT_DYNAMIC Thu Nov 2 19:59:55 UTC 2023 x86_64
Alert Count                   1205
First Seen                    2023-09-03 20:25:04 BST
Last Seen                     2023-12-01 21:33:40 GMT
Local ID                      2526417f-5014-4194-8db3-fb3499a890f1

Raw Audit Messages
type=AVC msg=audit(1701466420.881:575): avc:  denied  { append } for  pid=22070 comm="gdk-pixbuf-thum" path="socket:[25140]" dev="sockfs" ino=25140 scontext=unconfined_u:unconfined_r:thumb_t:s0-s0:c0.c1023 tcontext=system_u:system_r:init_t:s0 tclass=unix_stream_socket permissive=0


Hash: gdk-pixbuf-thum,thumb_t,init_t,unix_stream_socket,append

Version-Release number of selected component:
selinux-policy-targeted-38.30-1.fc38.noarch

Additional info:
reporter:       libreport-2.17.11
package:        selinux-policy-targeted-38.30-1.fc38.noarch
component:      selinux-policy
type:           libreport
comment:        I think I get this when Caja is generating thumbnails.
kernel:         6.6.2-101.fc38.x86_64
reason:         SELinux is preventing gdk-pixbuf-thum from 'append' accesses on the unix_stream_socket unix_stream_socket.
hashmarkername: setroubleshoot
component:      selinux-policy

Comment 1 Sam Tygier 2023-12-03 09:55:08 UTC
Created attachment 2002710 [details]
File: description

Comment 2 Sam Tygier 2023-12-03 09:55:09 UTC
Created attachment 2002711 [details]
File: os_info

Comment 3 Zdenek Pytela 2023-12-04 09:48:01 UTC
Sam,

Can you check if the following module is sufficient ?


# cat local_thumb_init_socket.cil
(allow thumb_t init_t (unix_stream_socket (append)))

# semodule -i local_thumb_init_socket.cil

Comment 4 Sam Tygier 2023-12-04 13:21:37 UTC
Yes that resolves it. I can now rm ~/.cache/thumbnails/, restart caja and I get no alerts while it draws the thumbnails.

Comment 5 Zdenek Pytela 2023-12-04 13:34:37 UTC
Thank you, PR has already been created.

Comment 6 Fedora Update System 2023-12-18 14:01:35 UTC
FEDORA-2023-aeccf7b447 has been submitted as an update to Fedora 38. https://bodhi.fedoraproject.org/updates/FEDORA-2023-aeccf7b447

Comment 7 Fedora Update System 2023-12-19 01:42:17 UTC
FEDORA-2023-aeccf7b447 has been pushed to the Fedora 38 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2023-aeccf7b447`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2023-aeccf7b447

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2024-01-03 02:18:14 UTC
FEDORA-2023-aeccf7b447 has been pushed to the Fedora 38 stable repository.
If problem still persists, please make note of it in this bug report.