| Summary: | /usr/libexec/postfix/tlsmgr can't write/create /var/lib/postfix/prng_exch | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Nils Philippsen <nphilipp> |
| Component: | selinux-policy | Assignee: | Daniel Walsh <dwalsh> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | CC: | mads, rvokal, twoerner |
| Target Milestone: | --- | Keywords: | Regression, SELinux |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2008-11-17 22:04:03 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
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Description
Nils Philippsen
2008-05-19 23:21:45 UTC
After relabeling the system, setroubleshoot speaks to me again: --- 8< --- Summary: SELinux is preventing tlsmgr (postfix_master_t) "write" to ./postfix (var_lib_t). Detailed Description: SELinux is preventing tlsmgr (postfix_master_t) "write" to ./postfix (var_lib_t). The SELinux type var_lib_t, is a generic type for all files in the directory and very few processes (SELinux Domains) are allowed to write to this SELinux type. This type of denial usual indicates a mislabeled file. By default a file created in a directory has the gets the context of the parent directory, but SELinux policy has rules about the creation of directories, that say if a process running in one SELinux Domain (D1) creates a file in a directory with a particular SELinux File Context (F1) the file gets a different File Context (F2). The policy usually allows the SELinux Domain (D1) the ability to write, unlink, and append on (F2). But if for some reason a file (./postfix) was created with the wrong context, this domain will be denied. The usual solution to this problem is to reset the file context on the target file, restorecon -v './postfix'. If the file context does not change from var_lib_t, then this is probably a bug in policy. Please file a bug report (http://bugzilla.redhat.com/bugzilla/enter_bug.cgi) against the selinux-policy package. If it does change, you can try your application again to see if it works. The file context could have been mislabeled by editing the file or moving the file from a different directory, if the file keeps getting mislabeled, check the init scripts to see if they are doing something to mislabel the file. Allowing Access: You can attempt to fix file context by executing restorecon -v './postfix' Fix Command: restorecon './postfix' Additional Information: Source Context unconfined_u:system_r:postfix_master_t:s0 Target Context system_u:object_r:var_lib_t:s0 Target Objects ./postfix [ dir ] Source tlsmgr Source Path /usr/libexec/postfix/tlsmgr Port <Unknown> Host wombat Source RPM Packages postfix-2.5.1-2.fc9 Target RPM Packages Policy RPM selinux-policy-3.3.1-51.fc9 Selinux Enabled True Policy Type targeted MLS Enabled True Enforcing Mode Enforcing Plugin Name mislabeled_file Host Name wombat Platform Linux wombat 2.6.25.3-18.fc9.x86_64 #1 SMP Tue May 13 04:54:47 EDT 2008 x86_64 x86_64 Alert Count 2 First Seen Tue 20 May 2008 01:44:53 AM CEST Last Seen Tue 20 May 2008 01:46:55 AM CEST Local ID 0838bcc0-c587-4d8f-a130-920c98c45832 Line Numbers Raw Audit Messages host=wombat type=AVC msg=audit(1211240815.811:43): avc: denied { write } for pid=4941 comm="tlsmgr" name="postfix" dev=dm-3 ino=720990 scontext=unconfined_u:system_r:postfix_master_t:s0 tcontext=system_u:object_r:var_lib_t:s0 tclass=dir host=wombat type=SYSCALL msg=audit(1211240815.811:43): arch=c000003e syscall=2 success=no exit=-13 a0=7f535ff6e920 a1=42 a2=180 a3=7fff66e03db0 items=0 ppid=4734 pid=4941 auid=500 uid=0 gid=0 euid=89 suid=0 fsuid=89 egid=89 sgid=0 fsgid=89 tty=(none) ses=1 comm="tlsmgr" exe="/usr/libexec/postfix/tlsmgr" subj=unconfined_u:system_r:postfix_master_t:s0 key=(null) --- >8 --- chcon -R -t postfix_var_lib_t /var/lib/postfix should fix. Fixed in selinux-policy-3.3.1-53.fc9.noarch (In reply to comment #2) > chcon -R -t postfix_var_lib_t /var/lib/postfix > > should fix. Tha seems to do it. Thanks for the quick response! *** Bug 447450 has been marked as a duplicate of this bug. *** I confirm that selinux-policy-3.3.1-53.fc9 fixes the problem for me (Bug 447450). The fix seems not to be mentioned in the package changelog? Closing all bugs that have been in modified for over a month. Please reopen if the bug is not actually fixed. |