| Summary: | SELinux is preventing /usr/libexec/postfix/smtp from read, write access on the files in directory /var/spool/postfix/deferred. | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | John Griffiths <fedora.jrg01> |
| Component: | selinux-policy | Assignee: | Miroslav Grepl <mgrepl> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 16 | CC: | dominick.grift, dwalsh, mgrepl |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Unspecified | ||
| Whiteboard: | abrt_hash:5a0ab9c83f7c67f320dfb7ecae911e45cfbca575e573892cc0a8bc23abc86c21 | ||
| Fixed In Version: | selinux-policy-3.10.0-74.fc16 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-01-31 22:02:54 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
As a workaround and possible solution, rather than creating a local policy, I changed the context on the directories defer and deferred in /var/spool/postfix from system_u:object_r:postfix_spool_maildrop_t:s0 to system_u:object_r:postfix_spool_t:s0 and the mail was properly delivered. The "postfix_spool_maildrop_t" is the correct label. If you disable your local policy # semodule -d name_your_module and execute # semanage permissive -a postfix_smtp_t what avc are you getting then? I had not made a local policy. I changed the context as stated in comment 1. After executing # semanage permissive -a postfix_smtp_t and then # grep AVC ./audit/audit.log | grep smtp > ~/avc.1 # cp /var/log/maillog ~/maillog.1 # mail me ... # grep AVC ./audit/audit.log | grep smtp > ~/avc.2 # cp /var/log/maillog ~/maillog.2 # diff ~/avc.1 ~/avc.2 There were no differences, so I assume no AVCs. # diff ~/maillog.1 ~/maillog.2 62322a62323,62335 > Dec 22 11:51:28 redacted postfix/pickup[5142]: 38C453C0198: uid=0 from=<root> > Dec 22 11:51:28 redacted postfix/cleanup[6710]: 38C453C0198: message-id=<20111222165128.38C453C0198.redacted2> > Dec 22 11:51:28 redacted postfix/qmgr[2036]: 38C453C0198: from=<root@redacted2>, size=458, nrcpt=1 (queue active) > Dec 22 11:51:28 redacted postfix/smtpd[6715]: connect from localhost[127.0.0.1] > Dec 22 11:51:28 redacted postfix/smtpd[6715]: D4D223C0144: client=localhost[127.0.0.1] > Dec 22 11:51:28 redacted postfix/cleanup[6710]: D4D223C0144: message-id=<20111222165128.38C453C0198.redacted2> > Dec 22 11:51:29 redacted postfix/qmgr[2036]: D4D223C0144: from=<root@redacted2>, size=957, nrcpt=1 (queue active) > Dec 22 11:51:29 redacted postfix/smtpd[6715]: disconnect from localhost[127.0.0.1] > Dec 22 11:51:29 redacted amavis[5771]: (05771-04) Passed CLEAN, <root@redacted2> -> <me>, Message-ID: <20111222165128.38C453C0198.redacted2>, mail_id: 4HibBy5AI0pv, Hits: -10.001, size: 458, queued_as: D4D223C0144, 704 ms > Dec 22 11:51:29 redacted postfix/smtp[6712]: 38C453C0198: to=<me>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.87, delays=0.14/0.01/0.01/0.71, dsn=2.0.0, status=sent (250 2.0.0 from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as D4D223C0144) > Dec 22 11:51:29 redacted postfix/qmgr[2036]: 38C453C0198: removed > Dec 22 11:51:29 redacted postfix/smtp[6717]: D4D223C0144: to=<me>, relay=outbound.mailhop.org[204.13.248.71]:2525, delay=0.58, delays=0.13/0.03/0.21/0.2, dsn=2.0.0, status=sent (250 OK id=1Rdlrd-00047F-DA) > Dec 22 11:51:29 redacted postfix/qmgr[2036]: D4D223C0144: removed So with postfix_smtp_t in permissive mode, there are no AVCs and mail is sent. The question is: Is it safe to have postfix_smtp_t in permissive mode? selinux-policy-3.10.0-74.fc16 has been submitted as an update for Fedora 16. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-74.fc16 Package selinux-policy-3.10.0-74.fc16: * should fix your issue, * was pushed to the Fedora 16 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-74.fc16' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-0983/selinux-policy-3.10.0-74.fc16 then log in and leave karma (feedback). selinux-policy-3.10.0-74.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report. |
libreport version: 2.0.8 executable: /usr/bin/python hashmarkername: setroubleshoot kernel: 3.1.5-6.fc16.i686.PAE reason: SELinux is preventing /usr/libexec/postfix/smtp from read, write access on the file /var/spool/postfix/deferred/5/530EB3C03EE. time: Wed 21 Dec 2011 04:18:53 PM EST description: :SELinux is preventing /usr/libexec/postfix/smtp from read, write access on the file /var/spool/postfix/deferred/5/530EB3C03EE. : :***** Plugin catchall (100. confidence) suggests *************************** : :If you believe that smtp should be allowed read write access on the 530EB3C03EE file 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 smtp /var/log/audit/audit.log | audit2allow -M mypol :# semodule -i mypol.pp : :Additional Information: :Source Context system_u:system_r:postfix_smtp_t:s0 :Target Context system_u:object_r:postfix_spool_maildrop_t:s0 :Target Objects /var/spool/postfix/deferred/5/530EB3C03EE [ file ] :Source smtp :Source Path /usr/libexec/postfix/smtp :Port <Unknown> :Host (removed) :Source RPM Packages postfix-2.8.7-1.fc16 :Target RPM Packages :Policy RPM selinux-policy-3.10.0-64.fc16 :Selinux Enabled True :Policy Type targeted :Enforcing Mode Enforcing :Host Name (removed) :Platform Linux daniel.internal.grifent.com : 3.1.5-6.fc16.i686.PAE #1 SMP Thu Dec 15 16:19:31 : UTC 2011 i686 i686 :Alert Count 2 :First Seen Wed 21 Dec 2011 03:55:28 PM EST :Last Seen Wed 21 Dec 2011 03:55:28 PM EST :Local ID 7906161e-3893-4fee-8aa8-bfb432eaad88 : :Raw Audit Messages :type=AVC msg=audit(1324500928.914:31364): avc: denied { read write } for pid=19056 comm="smtp" name="530EB3C03EE" dev=dm-3 ino=3933166 scontext=system_u:system_r:postfix_smtp_t:s0 tcontext=system_u:object_r:postfix_spool_maildrop_t:s0 tclass=file : : :type=SYSCALL msg=audit(1324500928.914:31364): arch=i386 syscall=open success=no exit=EACCES a0=2219d508 a1=8002 a2=0 a3=2219cc38 items=0 ppid=2033 pid=19056 auid=4294967295 uid=89 gid=89 euid=89 suid=89 fsuid=89 egid=89 sgid=89 fsgid=89 tty=(none) ses=4294967295 comm=smtp exe=/usr/libexec/postfix/smtp subj=system_u:system_r:postfix_smtp_t:s0 key=(null) : :Hash: smtp,postfix_smtp_t,postfix_spool_maildrop_t,file,read,write : :audit2allow : :#============= postfix_smtp_t ============== :allow postfix_smtp_t postfix_spool_maildrop_t:file { read write }; : :audit2allow -R : :#============= postfix_smtp_t ============== :allow postfix_smtp_t postfix_spool_maildrop_t:file { read write }; :