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Bug 746265

Summary: sssd needs to be allowed to create, delete and read symlinks in /var/lib/sss/pipes/private
Product: Red Hat Enterprise Linux 6 Reporter: Jakub Hrozek <jhrozek>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: high Docs Contact:
Priority: high    
Version: 6.2CC: dwalsh, jbastian, ksrot, mmalik, sgallagh, smizrahi, syeghiay
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-3.7.19-118.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 747608 754121 (view as bug list) Environment:
Last Closed: 2011-12-06 10:20:01 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:
Bug Depends On:    
Bug Blocks: 743841, 748554, 748898, 749255, 754121    

Description Jakub Hrozek 2011-10-14 15:06:20 UTC 
Description of problem:
The fix for https://bugzilla.redhat.com/show_bug.cgi?id=743841 included creating a symlink to a dbus socket in the /var/lib/sss/pipes/private directory. However, the selinux-policy must be tweaked in order to allow SSSD to manage symlinks there.

This BZ is a dependency of https://bugzilla.redhat.com/show_bug.cgi?id=743841

Version-Release number of selected component (if applicable):
selinux-policy-3.7.19-117.el6

How reproducible:
always

Steps to Reproduce:
1. install RHEL6.2 candidate SSSD (sssd-1.5.1-56 or newer)
2. service sssd start
3.
  
Actual results:
AVC denials

Expected results:
no AVC denials

Additional info:
Code-wise, we do:
 * symlink
 * stat
 * readlink
 * unlink

symlink, readlink and unlink on the symlink are only be called from sssd_be now, stat is done from the other sssd processes as well
Comment 1 Jakub Hrozek 2011-10-14 15:12:46 UTC 
type=AVC msg=audit(1318596215.810:92920): avc:  denied  { create } for  pid=19521 comm="sssd_be" name="sbus-dp_AD" scontext=unconfined_u:system_r:sssd_t:s0 tcontext=unconfined_u:object_r:sssd_var_lib_t:s0 tclass=lnk_file

type=AVC msg=audit(1318597994.204:92998): avc:  denied  { read } for  pid=19521 comm="sssd_be" name="sbus-dp_AD" dev=dm-0 ino=1833784 scontext=unconfined_u:system_r:sssd_t:s0 tcontext=unconfined_u:object_r:sssd_var_lib_t:s0 tclass=lnk_file

type=AVC msg=audit(1318597994.204:92999): avc:  denied  { unlink } for  pid=19521 comm="sssd_be" name="sbus-dp_AD" dev=dm-0 ino=1833784 scontext=unconfined_u:system_r:sssd_t:s0 tcontext=unconfined_u:object_r:sssd_var_lib_t:s0 tclass=lnk_file

type=AVC msg=audit(1318596216.167:92921): avc:  denied  { read } for  pid=19522 comm="sssd_nss" name="sbus-dp_AD" dev=dm-0 ino=1833784 scontext=unconfined_u:system_r:sssd_t:s0 tcontext=unconfined_u:object_r:sssd_var_lib_t:s0 tclass=lnk_file
Comment 3 Stephen Gallagher 2011-10-17 13:17:43 UTC 
*** Bug 746665 has been marked as a duplicate of this bug. ***
Comment 4 Miroslav Grepl 2011-10-17 13:31:40 UTC 
Ok, I will fix it in this case.
Comment 9 Miroslav Grepl 2011-10-18 16:51:57 UTC 
Fixed in selinux-policy-3.7.19-118.el6.noarch

# sesearch -A -s sssd_t -t sssd_var_lib_t -c lnk_file
Found 1 semantic av rules:
   allow sssd_t sssd_var_lib_t : lnk_file { ioctl read write create getattr setattr lock append unlink link rename } ;
Comment 14 errata-xmlrpc 2011-12-06 10:20:01 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.

http://rhn.redhat.com/errata/RHBA-2011-1511.html