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Bug 1427296

Summary:	selinux: modprobe command fails after copying kernel
Product:	Red Hat Enterprise Linux 7	Reporter:	David Arcari <darcari>
Component:	selinux-policy	Assignee:	Lukas Vrabec <lvrabec>
Status:	CLOSED DUPLICATE	QA Contact:	Milos Malik <mmalik>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	darcari, lvrabec, mgrepl, mmalik, plautrba, prarit, pvrabec, ssekidde
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1437012 (view as bug list)		Environment:
Last Closed:	2017-03-30 10:58:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description David Arcari 2017-02-27 20:07:28 UTC

Description of problem:

modprobe is returning EPERM:

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

This was happening with the 2-20-17 RHEL7.4 nightly build, but not the 2-09-17 nightly build.


How reproducible:

100%


Steps to Reproduce:
1.Provisioned system with 2/20 7.4 nightly build
2.copied upstream kernel from a different system
3.reboot
4. modprobe fails

Actual results:

# modprobe atusb
modprobe: ERROR: could not insert 'atusb': Permission denied


Expected results:

Successful load of module.


Additional info:

This problem was not happening on my system which was loaded with RHEL-7.4-20170209.n.0, but is happening on my system which was loaded with RHEL-7.4-20170220.n.1.

I loaded the selinux-policy associated with 20170220 on my system with 20170209 in order to prove that is in fact the issue.

1) Ran this command:

# rpm -Uvh selinux-policy-3.13.1-121.el7.noarch.rpm selinux-policy-targeted-3.13.1-121.el7.noarch.rpm
Preparing...                          ################################# [100%]
Updating / installing...
   1:selinux-policy-3.13.1-121.el7    ################################# [ 25%]
   2:selinux-policy-targeted-3.13.1-12################################# [ 50%]
Re-declaration of type docker_t
Failed to create node
Bad type declaration at /etc/selinux/targeted/tmp/modules/100/docker/cil:1
/usr/sbin/semodule:  Failed!
22k
Cleaning up / removing...
   3:selinux-policy-targeted-3.13.1-11################################# [ 75%]
   4:selinux-policy-3.13.1-117.el7    ################################

2) Console output:

[ 9287.389251] SELinux:  Class sctp_socket not defined in policy.
[ 9287.395102] SELinux:  Class icmp_socket not defined in policy.
[ 9287.400951] SELinux:  Class ax25_socket not defined in policy.
[ 9287.406793] SELinux:  Class ipx_socket not defined in policy.
[ 9287.412531] SELinux:  Class netrom_socket not defined in policy.
[ 9287.418539] SELinux:  Class atmpvc_socket not defined in policy.
[ 9287.424543] SELinux:  Class x25_socket not defined in policy.
[ 9287.430290] SELinux:  Class rose_socket not defined in policy.
[ 9287.436121] SELinux:  Class decnet_socket not defined in policy.
[ 9287.442141] SELinux:  Class atmsvc_socket not defined in policy.
[ 9287.448154] SELinux:  Class rds_socket not defined in policy.
[ 9287.453917] SELinux:  Class irda_socket not defined in policy.
[ 9287.459751] SELinux:  Class pppox_socket not defined in policy.
[ 9287.465681] SELinux:  Class llc_socket not defined in policy.
[ 9287.471442] SELinux:  Class can_socket not defined in policy.
[ 9287.477178] SELinux:  Class tipc_socket not defined in policy.
[ 9287.483035] SELinux:  Class bluetooth_socket not defined in policy.
[ 9287.489319] SELinux:  Class iucv_socket not defined in policy.
[ 9287.495173] SELinux:  Class rxrpc_socket not defined in policy.
[ 9287.501094] SELinux:  Class isdn_socket not defined in policy.
[ 9287.506966] SELinux:  Class phonet_socket not defined in policy.
[ 9287.512968] SELinux:  Class ieee802154_socket not defined in policy.
[ 9287.519312] SELinux:  Class caif_socket not defined in policy.
[ 9287.525143] SELinux:  Class alg_socket not defined in policy.
[ 9287.530882] SELinux:  Class nfc_socket not defined in policy.
[ 9287.536618] SELinux:  Class vsock_socket not defined in policy.
[ 9287.542534] SELinux:  Class kcm_socket not defined in policy.
[ 9287.548289] SELinux:  Class qipcrtr_socket not defined in policy.
[ 9287.554393] SELinux:  Class smc_socket not defined in policy.
[ 9287.560163] SELinux: the above unknown classes and permissions will be allowe


The net result is that the previously working system is now encountering the EPERM issue.

Comment 2 Milos Malik 2017-02-28 08:22:21 UTC

Could you collect SELinux denials on your machine and attach them here?

# dmesg | grep type=1400
# ausearch -m avc -m user_avc -m selinux_err -m user_selinux_err -i -ts today

Thank you.

It's very likely that this bug is a duplicate of BZ#1421598.

Comment 3 David Arcari 2017-02-28 13:44:48 UTC

Unfortunately I don't have the setup available at this time.

I guess you can go ahead and close this as a duplicate.  I will reopen it if I experience an issue going forward.

Comment 4 Milos Malik 2017-03-15 10:17:31 UTC

Which kernel version did you use? I don't see the "Class ... not defined in policy" messages.

Comment 5 Prarit Bhargava 2017-03-15 11:44:28 UTC

Milos, I can reproduce this on any recent RHEL7 install by doing the following:

1.  Install a beaker system with RHEL7 latest.  I am using 

baseurl=http://download.eng.bos.redhat.com/nightly/Pegas-7.4-20170313.n.0/compose/Server/x86_64/os

2.  Checkout the upstream git tree git://git.app.eng.bos.redhat.com/linux.git

To get the appropriate config, grab the latest RHEL7 upstream build from

http://hp-dl360pgen8-07.khw.lab.eng.bos.redhat.com/~jwilson/kernels/el7

and install the kernel-upstream RPM.  A config will be in /boot/config-XXX

3.  Build the linux git tree.  (make oldconfig; make -jX; make modules -jX)

4.  Install the linux build (make -jX modules_install; make -jX install)

5.  Boot that new kernel

6.  During the reboot you will see

 SELinux:  Permission validate_trans in class security not defined in policy.
 SELinux:  Permission module_load in class system not defined in policy.
 SELinux:  Class binder not defined in policy.
 SELinux:  Class cap_userns not defined in policy.
 SELinux:  Class cap2_userns not defined in policy.
 SELinux:  Class sctp_socket not defined in policy.
 SELinux:  Class icmp_socket not defined in policy.
 SELinux:  Class ax25_socket not defined in policy.
 SELinux:  Class ipx_socket not defined in policy.
 SELinux:  Class netrom_socket not defined in policy.
 SELinux:  Class atmpvc_socket not defined in policy.
 SELinux:  Class x25_socket not defined in policy.
 SELinux:  Class rose_socket not defined in policy.
 SELinux:  Class decnet_socket not defined in policy.
 SELinux:  Class atmsvc_socket not defined in policy.
 SELinux:  Class rds_socket not defined in policy.
 SELinux:  Class irda_socket not defined in policy.
 SELinux:  Class pppox_socket not defined in policy.
 SELinux:  Class llc_socket not defined in policy.
 SELinux:  Class can_socket not defined in policy.
 SELinux:  Class tipc_socket not defined in policy.
 SELinux:  Class bluetooth_socket not defined in policy.
 SELinux:  Class iucv_socket not defined in policy.
 SELinux:  Class rxrpc_socket not defined in policy.
 SELinux:  Class isdn_socket not defined in policy.
 SELinux:  Class phonet_socket not defined in policy.
 SELinux:  Class ieee802154_socket not defined in policy.
 SELinux:  Class caif_socket not defined in policy.
 SELinux:  Class alg_socket not defined in policy.
 SELinux:  Class nfc_socket not defined in policy.
 SELinux:  Class vsock_socket not defined in policy.
 SELinux:  Class kcm_socket not defined in policy.
 SELinux:  Class qipcrtr_socket not defined in policy.
 SELinux:  Class smc_socket not defined in policy.
 SELinux: the above unknown classes and permissions will be allowed
 audit: type=1403 audit(1489399697.991:3): policy loaded auid=4294967295 ses=4294967295 
 Successfully loaded SELinux policy in 455.140ms.

I will test with the RHEL7 git tree and update this BZ.

P.

Comment 6 Prarit Bhargava 2017-03-15 11:58:29 UTC

This does not occur with the RHEL7 git tree AFAICT.  darcari, can you confirm?

Thanks,

P.

Comment 7 David Arcari 2017-03-15 12:09:34 UTC

(In reply to Milos Malik from comment #4)
> Which kernel version did you use? I don't see the "Class ... not defined in
> policy" messages.

AFAICT the build that I used is no longer available.  I was using the 2.20.17 nightly build.

Prarit - I never saw this issue when I have built my own kernel; however, it appears that it was only present during a brief window.

Comment 11 Lukas Vrabec 2017-03-30 10:58:55 UTC


*** This bug has been marked as a duplicate of bug 1414130 ***