Bug 1459078 - SELinux is preventing login from using the 'dac_read_search' capabilities.
SELinux is preventing login from using the 'dac_read_search' capabilities.
Status: CLOSED DUPLICATE of bug 1459081
Product: Fedora
Classification: Fedora
Component: selinux-policy (Show other bugs)
x86_64 Unspecified
unspecified Severity unspecified
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Assigned To: Lukas Vrabec
Fedora Extras Quality Assurance
Depends On:
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Reported: 2017-06-06 04:54 EDT by Bruno Javier Blasco Smaranda
Modified: 2017-06-06 07:52 EDT (History)
7 users (show)

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Last Closed: 2017-06-06 07:52:12 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Bruno Javier Blasco Smaranda 2017-06-06 04:54:41 EDT
Description of problem:
This is a fresh rawhide installation upgraded by dnf plugin from a fresh f25 installation.
I was told in IRC the events are due to a kernel change where the order of dac_read_search and dac_override changed to fix check dac_read_search
SELinux is preventing login from using the 'dac_read_search' capabilities.

*****  Plugin dac_override (91.4 confidence) suggests   **********************

If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system
Then turn on full auditing to get path information about the offending file and generate the error again.

Turn on full auditing
# auditctl -w /etc/shadow -p w
Try to recreate AVC. Then execute
# ausearch -m avc -ts recent
If you see PATH record check ownership/permissions on file, and fix it,
otherwise report as a bugzilla.

*****  Plugin catchall (9.59 confidence) suggests   **************************

If you believe that login should have the dac_read_search capability by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
allow this access for now by executing:
# ausearch -c 'login' --raw | audit2allow -M my-login
# semodule -X 300 -i my-login.pp

Additional Information:
Source Context                system_u:system_r:local_login_t:s0-s0:c0.c1023
Target Context                system_u:system_r:local_login_t:s0-s0:c0.c1023
Target Objects                Unknown [ capability ]
Source                        login
Source Path                   login
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-255.fc27.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.12.0-0.rc3.git0.2.fc27.x86_64 #1
                              SMP Tue May 30 19:36:51 UTC 2017 x86_64 x86_64
Alert Count                   1
First Seen                    2017-06-05 21:40:47 CEST
Last Seen                     2017-06-05 21:40:47 CEST
Local ID                      955c23f4-1986-4c56-9856-ecccd299043b

Raw Audit Messages
type=AVC msg=audit(1496691647.830:1515): avc:  denied  { dac_read_search } for  pid=11580 comm="login" capability=2  scontext=system_u:system_r:local_login_t:s0-s0:c0.c1023 tcontext=system_u:system_r:local_login_t:s0-s0:c0.c1023 tclass=capability permissive=0

Hash: login,local_login_t,local_login_t,capability,dac_read_search

Version-Release number of selected component:

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.1
hashmarkername: setroubleshoot
kernel:         4.12.0-0.rc3.git0.2.fc27.x86_64
type:           libreport
Comment 1 Lukas Vrabec 2017-06-06 07:52:12 EDT

*** This bug has been marked as a duplicate of bug 1459081 ***

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