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Bug 1151030 - after a crash, SELinux is preventing sosreport to mkdir
Summary: after a crash, SELinux is preventing sosreport to mkdir
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.1
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Martin Žember
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-10-09 12:51 UTC by Martin Žember
Modified: 2015-07-13 04:14 UTC (History)
3 users (show)

Fixed In Version: selinux-policy-3.13.1-5.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-05 10:45:50 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
AVCs caught in enforcing mode (13.28 KB, text/plain)
2014-10-09 19:14 UTC, Milos Malik 		no flags Details
AVCs caught in permissive mode (7.78 KB, text/plain)
2014-10-09 19:14 UTC, Milos Malik 		no flags Details
AVCs caught in permissive mode (original tshark crash) (11.60 KB, text/plain)
2014-10-10 01:27 UTC, Martin Žember 		no flags Details
View All


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:0458 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2015-03-05 15:17:00 UTC

Description Martin Žember 2014-10-09 12:51:08 UTC 
Description of problem:
SELinux is preventing /usr/bin/python2.7 from 'write' accesses on the directory .

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


How reproducible:
Always

Steps to Reproduce:
1. Default installation (ABRT enabled)
2. tshark -nxr <bz1010028 crash reproducing pcap>

Actual results:
SELinux AVC

Expected results:


Additional info:

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

If you believe that python2.7 should be allowed write access on the  directory 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:
# grep yum /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:sosreport_t:s0-s0:c0.c1023
Target Context                system_u:object_r:cert_t:s0
Target Objects                 [ dir ]
Source                        yum
Source Path                   /usr/bin/python2.7
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           python-2.7.5-16.el7.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-2.el7.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 3.10.0-123.el7.x86_64 #1 SMP Mon
                              May 5 11:16:57 EDT 2014 x86_64 x86_64
Alert Count                   12
First Seen                    2014-10-09 14:06:52 CEST
Last Seen                     2014-10-09 14:17:22 CEST
Local ID                      11c27063-6f54-4e31-be65-0847b0f61b75

Raw Audit Messages
type=AVC msg=audit(1412857042.121:23047): avc:  denied  { write } for  pid=13052 comm="rhsm-debug" name="pki" dev="dm-1" ino=2359306 scontext=system_u:system_r:sosreport_t:s0-s0:c0.c1023 tcontext=system_u:object_r:cert_t:s0 tclass=dir


type=SYSCALL msg=audit(1412857042.121:23047): arch=x86_64 syscall=mkdir success=no exit=EACCES a0=29291d0 a1=1ff a2=7f916b0e1f88 a3=7fff9f5f8ad0 items=0 ppid=13051 pid=13052 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=rhsm-debug exe=/usr/bin/python2.7 subj=system_u:system_r:sosreport_t:s0-s0:c0.c1023 key=(null)

Hash: yum,sosreport_t,cert_t,dir,write
Comment 1 Miroslav Grepl 2014-10-09 16:26:04 UTC 
Martin,
are you getting more AVCs in permissive mode? Did it work correctly? I believe we can dontaudit it.
Comment 2 Milos Malik 2014-10-09 18:59:13 UTC 
Here is my reproducer, but it uses a different ABRT addon:

# sleep 120 &
[1] 2315
# kill -6 2315
# 
[1]+  Aborted                 (core dumped) sleep 120
#

Here are suggestions produced by audit2allow (enforcing mode):

allow sosreport_t NetworkManager_t:dbus send_msg;
allow sosreport_t NetworkManager_var_run_t:sock_file write;
allow sosreport_t self:netlink_audit_socket create;
allow sosreport_t semanage_store_t:dir write;
allow sosreport_t var_lib_nfs_t:dir write;

Gathered AVCs will be attached.
Comment 3 Milos Malik 2014-10-09 19:14:30 UTC 
Created attachment 945427 [details]
AVCs caught in enforcing mode
Comment 4 Milos Malik 2014-10-09 19:14:57 UTC 
Created attachment 945428 [details]
AVCs caught in permissive mode
Comment 5 Martin Žember 2014-10-10 01:27:40 UTC 
Created attachment 945457 [details]
AVCs caught in permissive mode (original tshark crash)
Comment 6 Miroslav Grepl 2014-10-10 10:30:12 UTC 
commit a42d8becdd28570605c380d07a940c7284de4730
Author: Miroslav Grepl <mgrepl>
Date:   Fri Oct 10 12:29:56 2014 +0200

    Make sosreport as unconfined domain.
Comment 12 errata-xmlrpc 2015-03-05 10:45:50 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-2015-0458.html
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