Bug 839428
| Summary: | SELinux reporting denied pipe read/write for sendmail.postfix | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Scott Shambarger <scott-fedora> |
| 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: | 17 | CC: | dominick.grift, dwalsh, mgrepl |
| Target Milestone: | --- | Keywords: | Reopened |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-08-10 22:35:26 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Added +allow mailserver_delivery mailserver_delivery:fifo_file rw_inherited_fifo_file_ to Rawhide to allow all mail apps to use inherited fifo files. Added to F17. Tested with selinux-policy-3.10.0-140:
type=AVC msg=audit(1343362745.333:30288): avc: denied { write } for pid=1841 comm="sendmail" path="pipe:[1271669]" dev="pipefs" ino=1271669 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 tclass=fifo_file
... still logged.
Try the lastest build from koji http://koji.fedoraproject.org/koji/buildinfo?buildID=343797 selinux-policy-3.10.0-142.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-142.fc17 Installed and tried selinux-policy-3.10.0-142, but still getting the same denial -- audit2why -b:
type=AVC msg=audit(1343412672.784:91): avc: denied { write } for pid=2031 comm="sendmail" path="pipe:[20651]" dev="pipefs" ino=20651 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 tclass=fifo_file
type=AVC msg=audit(1343412672.784:91): avc: denied { read } for pid=2031 comm="sendmail" path="pipe:[20651]" dev="pipefs" ino=20651 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 tclass=fifo_file
Package selinux-policy-3.10.0-142.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-142.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-11215/selinux-policy-3.10.0-142.fc17 then log in and leave karma (feedback). Ah, you are right. I found a bug. Fixed in selinux-policy-3.10.0-143 selinux-policy-3.10.0-142.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report. Re-opening since -142 did not include the fix (In reply to comment #9) > Fixed in selinux-policy-3.10.0-143 Yes, but -143 seems to have a build error related to spamassassin... might want to investigate that. Fixed. Installed -143, still exactly the same errors logged (ref comment#6) Ah, I meant fixed in -144 which is now built. selinux-policy-3.10.0-145.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-145.fc17 Funny, -145 still hasn't shown up in the updates-testing cache (yum reports using mirror.web-ster.com) -- even if I nuke the cache, the package file is still dated Aug 5th... are the mirrors having problems? Package selinux-policy-3.10.0-145.fc17: * should fix your issue, * was pushed to the Fedora 17 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-145.fc17' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-11591/selinux-policy-3.10.0-145.fc17 then log in and leave karma (feedback). selinux-policy-3.10.0-145.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report. Finally had a chance to test this, and yes, it's fixed in -145 :) |
Description of problem: SELinux is reporting denied pipe read/write when executing sendmail.postfix Version-Release number of selected component (if applicable): selinux-policy-3.10.0-134 How reproducible: Always Steps to Reproduce: 1. Setup postfix mailbox_command=/usr/libexec/dovecot/dovecot-lda 2. Setup a .forward (or sieve command) so dovecot-lda calls /usr/sbin/sendmail (which is really sendmail.postfix) 3. When sendmail.postfix is started, it causes AVC denials for fifo_file { read write } Actual results: Audit messages are created: type=AVC msg=audit(1342048249.782:73306): avc: denied { write } for pid=8356 comm="sendmail" path="pipe:[815212\ ]" dev="pipefs" ino=815212 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 \ tclass=fifo_file type=AVC msg=audit(1342048249.782:73306): avc: denied { read } for pid=8356 comm="sendmail" path="pipe:[815212]\ " dev="pipefs" ino=815212 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 t\ class=fifo_file type=AVC msg=audit(1342048249.782:73306): avc: denied { write } for pid=8356 comm="sendmail" path="pipe:[815215\ ]" dev="pipefs" ino=815215 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 \ tclass=fifo_file type=AVC msg=audit(1342048249.782:73306): avc: denied { write } for pid=8356 comm="sendmail" path="pipe:[815215\ ]" dev="pipefs" ino=815215 scontext=system_u:system_r:sendmail_t:s0 tcontext=system_u:system_r:postfix_local_t:s0 \ tclass=fifo_file Expected results: No denials are logged. Additional info: Running strace -f on postfix's master process, it doesn't appear that sendmail.postfix actually reads or writes directly to the pipe. I'm not sure if the pipe:[815212] inos actually correspond to the entries I see in the strace output, but if they do, this are probably just pipes leaking through from the parent [815215] and grandparent [815212] processes, and are probably not intended to remain open (ie leaks). Since sendmail.postfix appears to function as intended without the permissions, it's probably ok to just "dontaudit" the denials, eg: dontaudit sendmail_t postfix_local_t:fifo_file { write read };