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Bug 1655493 - On an AWS t3.micro instance SELinux gives errors for NVM devices
Summary: On an AWS t3.micro instance SELinux gives errors for NVM devices
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.6
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-12-03 10:07 UTC by Parikshit Khedekar
Modified: 2019-08-06 12:53 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-08-06 12:52:54 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:2127 0 None None None 2019-08-06 12:53:18 UTC

Description Parikshit Khedekar 2018-12-03 10:07:13 UTC 
Description of problem:

On an AWS t3.micro instance system marks following SELinux errors for NVM devices

$ sudo sealert -l ef9fbeb6-358c-4e20-8a3e-e65cd860cba5
SELinux is preventing /usr/sbin/rpc.mountd from read access on the blk_file nvme0n1p2.

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

If you believe that rpc.mountd should be allowed read access on the nvme0n1p2 blk_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 'rpc.mountd' --raw | audit2allow -M my-rpcmountd
# semodule -i my-rpcmountd.pp


Additional Information:
Source Context                system_u:system_r:nfsd_t:s0
Target Context                system_u:object_r:nvme_device_t:s0
Target Objects                nvme0n1p2 [ blk_file ]
Source                        rpc.mountd
Source Path                   /usr/sbin/rpc.mountd
Port                          <Unknown>
Host                          ip-10-215-213-105.eu-west-1.compute.internal
Source RPM Packages           nfs-utils-1.3.0-0.61.el7.x86_64
Target RPM Packages
Policy RPM                    selinux-policy-3.13.1-229.el7_6.5.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     ip-10-215-213-105.eu-west-1.compute.internal
Platform                      Linux ip-10-215-213-105.eu-west-1.compute.internal
                              3.10.0-957.el7.x86_64 #1 SMP Thu Oct 4 20:48:51
                              UTC 2018 x86_64 x86_64
Alert Count                   29
First Seen                    2018-09-17 18:21:14 UTC
Last Seen                     2018-11-14 14:33:20 UTC
Local ID                      ef9fbeb6-358c-4e20-8a3e-e65cd860cba5

Raw Audit Messages
type=AVC msg=audit(1542206000.948:39139): avc:  denied  { read } for  pid=15281 comm="rpc.mountd" name="nvme0n1p2" dev="devtmpfs" ino=10945 scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:object_r:nvme_device_t:s0 tclass=blk_file permissive=0


type=SYSCALL msg=audit(1542206000.948:39139): arch=x86_64 syscall=open success=no exit=EACCES a0=557e2e055b80 a1=80000 a2=0 a3=0 items=0 ppid=1 pid=15281 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=rpc.mountd exe=/usr/sbin/rpc.mountd subj=system_u:system_r:nfsd_t:s0 key=(null)

Hash: rpc.mountd,nfsd_t,nvme_device_t,blk_file,read



Version-Release number of selected component (if applicable):

selinux-policy-3.13.1-229.el7_6.5.noarch

How reproducible:

On Red Hat Enterprise Linux 7.6

Steps to Reproduce:

1. Update to selinux-policy-3.13.1-229.el7_6.5.noarch on AWS t3.micro instances with NVM devices
2. check the sealert
3.

Actual results:


Hash: rpc.mountd,nfsd_t,nvme_device_t,blk_file,read are prevented from read access by Selinux.

Expected results:

It should allow it.

Additional info:
Comment 12 errata-xmlrpc 2019-08-06 12:52:54 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:2127
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