Bug 1647493 - bind: denied { map } for named
Summary: bind: denied { map } for named
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 31
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Zdenek Pytela
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-11-07 15:33 UTC by Petr Menšík
Modified: 2020-01-21 01:38 UTC (History)
6 users (show)

Fixed In Version: selinux-policy-3.14.4-44.fc31
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-01-21 01:38:36 UTC
Type: Bug
Embargoed:


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Description Petr Menšík 2018-11-07 15:33:35 UTC
Description of problem:
I was playing with different types of zone files, I found memory mapping is not allowed to bind. Even if it is not default, it should be possible.

Version-Release number of selected component (if applicable):
selinux-policy-3.14.1-40.fc28.noarch
bind-9.11.4-10.P2.fc28.x86_64

How reproducible:
always

Steps to Reproduce:
1. dnf install bind bind-utils
2. named-compilezone -F map -o /var/named/dynamic/named.map test /var/named/named.empty
3. Append into /etc/named.conf:
zone "test" IN {
        type master;
        file "dynamic/named.map";
        masterfile-format map;
};

4. systemctl restart named

Actual results:
failed.
$ ausearch -ts recent -i -sv no
type=AVC msg=audit(7.11.2018 10:17:01.705:372) : avc:  denied  { map } for  pid=2005 comm=named-checkconf path=/var/named/dynamic/named.map dev="vda1" ino=264015 scontext=system_u:system_r:named_t:s0 tcontext=unconfined_u:object_r:named_cache_t:s0 tclass=file permissive=0 

Expected results:
success, no AVC denials

Additional info:
I would like to add support of lmdb into named by default. It is memory-mapped database that is used by default. If it is enabled, service will not even start with default configuration, because it uses memory mapping by default.

both named_zone_t and named_cache_t types should be able to map into memory for faster access.

Comment 1 Nikola Knazekova 2019-07-16 14:42:50 UTC
PR for Fedora: https://github.com/fedora-selinux/selinux-policy-contrib/pull/122

Comment 2 Lukas Vrabec 2019-07-18 13:44:48 UTC
PR merged.

Comment 3 Ben Cotton 2019-08-13 17:06:08 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 31 development cycle.
Changing version to '31'.

Comment 4 Ben Cotton 2019-08-13 19:01:09 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 31 development cycle.
Changing version to 31.

Comment 5 Fedora Update System 2019-09-05 06:50:48 UTC
FEDORA-2019-ebfc4df1ad has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-ebfc4df1ad

Comment 6 Fedora Update System 2019-09-05 10:52:04 UTC
selinux-policy-3.14.4-32.fc31 has been pushed to the Fedora 31 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-ebfc4df1ad

Comment 7 Fedora Update System 2019-09-16 07:05:26 UTC
FEDORA-2019-8169f4e6b7 has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-8169f4e6b7

Comment 8 Fedora Update System 2019-09-17 02:14:12 UTC
selinux-policy-3.14.4-33.fc31 has been pushed to the Fedora 31 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-8169f4e6b7

Comment 9 Göran Uddeborg 2019-12-02 22:12:34 UTC
I see what I believe is the same problem with selinux-policy-3.14.4-39.fc31, a higher release number than the one sent to testing above.  After upgrading to the latest _bind_, I get an error trying to start _named_:

    dec 02 15:27:59 mimmi named[3105457]: mdb_env_open of 'localnet.nzd' failed: Permission denied
    dec 02 15:27:59 mimmi named[3105457]: loading configuration: failure
    dec 02 15:27:59 mimmi named[3105457]: exiting (due to fatal error)

If starting named in permissive mode, I get the same error when trying "rndc reload".

Adding a module with the following allow rule, I don't see any (immediate) issues any more.

allow named_t named_zone_t:file map;

Comment 10 Lukas Vrabec 2019-12-03 11:39:03 UTC
commit 07b21cf3a9fc1f2872a401f94e762ba12e885c48 (HEAD -> rawhide)
Author: Lukas Vrabec <lvrabec>
Date:   Tue Dec 3 12:38:51 2019 +0100

    Allow named_t domain to mmap named_zone_t files BZ(1647493)

Comment 11 Fedora Update System 2020-01-14 01:43:26 UTC
selinux-policy-3.14.4-44.fc31 has been pushed to the Fedora 31 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-397eea28b7

Comment 12 Fedora Update System 2020-01-21 01:38:36 UTC
selinux-policy-3.14.4-44.fc31 has been pushed to the Fedora 31 stable repository. If problems still persist, please make note of it in this bug report.


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