1216094 – /usr/libexec/sssd/selinux_child crashes and gets avc denial when ssh

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Bug 1216094 - /usr/libexec/sssd/selinux_child crashes and gets avc denial when ssh

Summary: /usr/libexec/sssd/selinux_child crashes and gets avc denial when ssh

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	sssd
Sub Component:
Version:	6.7
Hardware:	Unspecified
OS:	Unspecified
Priority:	medium
Severity:	unspecified
Target Milestone:	rc
Target Release:	---
Assignee:	SSSD Maintainers
QA Contact:	Kaushik Banerjee
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Reported:	2015-04-28 13:28 UTC by Xiyang Dong
Modified:	2020-05-02 18:04 UTC (History)
CC List:	10 users (show)
Fixed In Version:	sssd-1.12.4-40.el6
Doc Type:	Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:	2015-07-22 06:44:22 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)
full abrt email (18.64 KB, text/plain) 2015-04-28 13:28 UTC, Xiyang Dong	no flags	Details
avc log (6.33 KB, text/plain) 2015-04-28 13:29 UTC, Xiyang Dong	no flags	Details
avc log 2 (22.03 KB, text/plain) 2015-06-08 14:05 UTC, Xiyang Dong	no flags	Details
View All

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Github	SSSD sssd issues 3690	0	None	None	None	2020-05-02 18:04:05 UTC
Red Hat Product Errata	RHBA-2015:1448	0	normal	SHIPPED_LIVE	sssd bug fix and enhancement update	2015-07-20 18:43:53 UTC

Description Xiyang Dong 2015-04-28 13:28:00 UTC

Created attachment 1019677 [details]
full abrt email

Description of problem:
/usr/libexec/sssd/selinux_child crashes and gets avc denial when ssh

abrt_version:   2.0.8
backtrace_rating: 0
cgroup:         
cmdline:        /usr/libexec/sssd/selinux_child --debug-microseconds=0 --debug-timestamps=1 --debug-fd=21 --debug-level=0x0010
crash_function: semanage_disconnect
executable:     /usr/libexec/sssd/selinux_child
hostname:       ibm-x3650m4-01-vm-06.testrelm.test
kernel:         2.6.32-504.el6.x86_64
last_occurrence: 1430165842
open_fds:       
pid:            9809
pwd:            /
time:           Mon 27 Apr 2015 04:17:22 PM EDT
uid:            0
username:       root

Version-Release number of selected component (if applicable):
sssd-1.12.4-31.el6

How reproducible:
Always

Steps to Reproduce:
1.Upgrades from 6.6 to 6.7
2.ssh check as I pasted on additional info 

Actual results:
/usr/libexec/sssd/selinux_child crashes and gets avc denial when ssh

Expected results:
no crash and no avc denial

Additional info:

ssh check tests:
:: [ 16:17:18 ] :: {{{{{{{{{{{{{{{{{{{ starting ipa_quicktest_ssh_check ipa_upgrade_master_replica_client_all_1 }}}}}}}}}}}}}}}}}}}
:: [ 16:17:18 ] :: 
:: [ 16:17:18 ] :: 
:: [  BEGIN   ] :: Running 'ssh-keyscan -t dsa ibm-x3650m4-01-vm-06.testrelm.test > /tmp/ssh_host_dsa_key_ibm-x3650m4-01-vm-06.testrelm.test.pub 2>/dev/null'
:: [   PASS   ] :: Command 'ssh-keyscan -t dsa ibm-x3650m4-01-vm-06.testrelm.test > /tmp/ssh_host_dsa_key_ibm-x3650m4-01-vm-06.testrelm.test.pub 2>/dev/null' (Expected 0, got 0)
:: [  BEGIN   ] :: Running 'ssh-keyscan -t rsa ibm-x3650m4-01-vm-06.testrelm.test > /tmp/ssh_host_rsa_key_ibm-x3650m4-01-vm-06.testrelm.test.pub 2>/dev/null'
:: [   PASS   ] :: Command 'ssh-keyscan -t rsa ibm-x3650m4-01-vm-06.testrelm.test > /tmp/ssh_host_rsa_key_ibm-x3650m4-01-vm-06.testrelm.test.pub 2>/dev/null' (Expected 0, got 0)
:: [ 16:17:19 ] :: Checking for User SSH Public Key
:: [  BEGIN   ] :: Running 'ipa user-show sshuser1 | grep 1A:50:63:B9:52:12:50:50:F1:4C:DD:AE:87:DD:F1:27'
  SSH public key fingerprint: 1A:50:63:B9:52:12:50:50:F1:4C:DD:AE:87:DD:F1:27 root.test (ssh-rsa)
:: [   PASS   ] :: Command 'ipa user-show sshuser1 | grep 1A:50:63:B9:52:12:50:50:F1:4C:DD:AE:87:DD:F1:27' (Expected 0, got 0)
:: [ 16:17:20 ] :: Checking for Host SSH Public DSA Key
:: [  BEGIN   ] :: Running 'ipa host-show ibm-x3650m4-01-vm-06.testrelm.test | grep 18:7A:09:11:6E:B2:DA:0C:05:74:54:A3:59:45:AA:67'
  SSH public key fingerprint: 18:7A:09:11:6E:B2:DA:0C:05:74:54:A3:59:45:AA:67 (ssh-dss), E7:7E:D5:03:92:C7:82:84:50:0A:D0:CB:DB:A6:A8:D7 (ssh-rsa)
:: [   PASS   ] :: Command 'ipa host-show ibm-x3650m4-01-vm-06.testrelm.test | grep 18:7A:09:11:6E:B2:DA:0C:05:74:54:A3:59:45:AA:67' (Expected 0, got 0)
:: [ 16:17:21 ] :: Checking for Host SSH Public RSA Key
:: [  BEGIN   ] :: Running 'ipa host-show ibm-x3650m4-01-vm-06.testrelm.test | grep E7:7E:D5:03:92:C7:82:84:50:0A:D0:CB:DB:A6:A8:D7'
  SSH public key fingerprint: 18:7A:09:11:6E:B2:DA:0C:05:74:54:A3:59:45:AA:67 (ssh-dss), E7:7E:D5:03:92:C7:82:84:50:0A:D0:CB:DB:A6:A8:D7 (ssh-rsa)
:: [   PASS   ] :: Command 'ipa host-show ibm-x3650m4-01-vm-06.testrelm.test | grep E7:7E:D5:03:92:C7:82:84:50:0A:D0:CB:DB:A6:A8:D7' (Expected 0, got 0)
:: [  BEGIN   ] :: Running 'ssh -o StrictHostKeyChecking=no -i /tmp/id_rsa_sshuser1 sshuser1.test hostname'
Could not chdir to home directory /home/sshuser1: No such file or directory
ibm-x3650m4-01-vm-06.testrelm.test
:: [   PASS   ] :: Command 'ssh -o StrictHostKeyChecking=no -i /tmp/id_rsa_sshuser1 sshuser1.test hostname' (Expected 0, got 0)
:: [ 16:17:22 ] :: 

I also attached full abrt email and avc log

Comment 1 Xiyang Dong 2015-04-28 13:29:18 UTC

Created attachment 1019678 [details]
avc log

Comment 3 Jakub Hrozek 2015-04-28 13:51:26 UTC

Can I get access to a system that reproduces the crash or at least the full abrt tarball?

Comment 6 Jakub Hrozek 2015-05-06 13:56:14 UTC

Upstream ticket:
https://fedorahosted.org/sssd/ticket/2649

Comment 7 Jakub Hrozek 2015-05-11 08:04:13 UTC

* master: 589a8760b38d9e2dfa278764af12d59e1487fe07
* sssd-1-12: 2ed3ac5190cd8f92d671e00837a360bd92cf150c

Comment 9 Xiyang Dong 2015-06-08 14:04:13 UTC

Crash is gone but still gets avc denial on sssd-1.12.4-45.el6.x86_64

Comment 10 Xiyang Dong 2015-06-08 14:05:15 UTC

Created attachment 1036377 [details]
avc log 2

Comment 11 Jakub Hrozek 2015-06-08 14:11:48 UTC

(In reply to Xiyang Dong from comment #10)
> Created attachment 1036377 [details]
> avc log 2

Are you running the latest 6.7 selinux policy version? If yes, then please open a bug against selinux policy.

Comment 12 Xiyang Dong 2015-06-08 17:06:48 UTC

Thanks, found that selinux didn't get updated to latest in the test.
With newest selinux-policy, the avc denial messages disappear too.

Verified on: 
sssd-1.12.4-45.el6.
selinux-policy-3.7.19-272.el6.

No crash or avc denial found.

Comment 14 errata-xmlrpc 2015-07-22 06:44:22 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://rhn.redhat.com/errata/RHBA-2015-1448.html

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