Bug 929103
| Summary: | GDM login with Kerberos account and NFS4 home directory won't work until console login has been made due to SELinux policy | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Carl-Johan Schenström <cjs> |
| 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: | 18 | CC: | bfields, dominick.grift, dwalsh, jlayton, mgrepl, steved |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-04-18 02:50:29 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: | |||
reassigning to selinux-policy 9f4ec9f473e7dced9a702add780fa2bfa51bf84d fixes this in git. Back ported. selinux-policy-3.11.1-90.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/selinux-policy-3.11.1-90.fc18 Package selinux-policy-3.11.1-90.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing selinux-policy-3.11.1-90.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2013-5742/selinux-policy-3.11.1-90.fc18 then log in and leave karma (feedback). selinux-policy-3.11.1-90.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report. |
Description of problem: Fedora 18 client authenticating against Samba 4 KDC, via SSSD, and automounting home directories over NFS4 with sec=krb5. After booting the client, GDM logins are rejected due to SELinux policy. Switching to text console and logging in resolves the problem. Version-Release number of selected component (if applicable): nfs-utils-1.2.7-3.fc18.x86_64 sssd-1.9.4-5.fc18.x86_64 selinux-policy-3.11.1-86.fc18.noarch selinux-policy-targeted-3.11.1-86.fc18.noarch How reproducible: Always? Steps to Reproduce: 1. Install and configure Kerberos client. 2. Reboot. 3. Try to login. Actual results: Not allowed to login. Expected results: My desktop. Additional info: /var/log/messages: [root@portello log]# grep SELinux messages | tail -n 1 Mar 29 09:15:21 portello setroubleshoot: SELinux is preventing /usr/sbin/rpc.gssd from write access on the directory krb5cc_497cd97092d5c83008b5396a51554d91. For complete SELinux messages. run sealert -l 6f4f209e-12b0-4db2-9a97-9ecb52f9f088 [root@portello log]# sealert -l 6f4f209e-12b0-4db2-9a97-9ecb52f9f088 SELinux is preventing /usr/sbin/rpc.gssd from write access on the directory krb5cc_497cd97092d5c83008b5396a51554d91. ***** Plugin catchall (100. confidence) suggests *************************** If you believe that rpc.gssd should be allowed write access on the krb5cc_497cd97092d5c83008b5396a51554d91 directory 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 rpc.gssd /var/log/audit/audit.log | audit2allow -M mypol # semodule -i mypol.pp Additional Information: Source Context system_u:system_r:gssd_t:s0 Target Context system_u:object_r:user_tmp_t:s0 Target Objects krb5cc_497cd97092d5c83008b5396a51554d91 [ dir ] Source rpc.gssd Source Path /usr/sbin/rpc.gssd Port <Unknown> Host portello.bluebox.pp.se Source RPM Packages nfs-utils-1.2.7-3.fc18.x86_64 Target RPM Packages Policy RPM selinux-policy-3.11.1-86.fc18.noarch Selinux Enabled True Policy Type targeted Enforcing Mode Enforcing Host Name portello.bluebox.pp.se Platform Linux portello.bluebox.pp.se 3.8.4-202.fc18.x86_64 #1 SMP Thu Mar 21 17:02:20 UTC 2013 x86_64 x86_64 Alert Count 14 First Seen 2013-03-27 16:34:55 CET Last Seen 2013-03-29 09:15:19 CET Local ID 6f4f209e-12b0-4db2-9a97-9ecb52f9f088 Raw Audit Messages type=AVC msg=audit(1364544919.917:336): avc: denied { write } for pid=605 comm="rpc.gssd" name="krb5cc_497cd97092d5c83008b5396a51554d91" dev="tmpfs" ino=23576 scontext=system_u:system_r:gssd_t:s0 tcontext=system_u:object_r:user_tmp_t:s0 tclass=dir type=SYSCALL msg=audit(1364544919.917:336): arch=x86_64 syscall=open success=no exit=EACCES a0=7f5977c3e890 a1=c2 a2=180 a3=6093b4fd6 items=0 ppid=1 pid=605 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 ses=4294967295 tty=(none) comm=rpc.gssd exe=/usr/sbin/rpc.gssd subj=system_u:system_r:gssd_t:s0 key=(null) Hash: rpc.gssd,gssd_t,user_tmp_t,dir,write audit2allow #============= gssd_t ============== allow gssd_t user_tmp_t:dir write; audit2allow -R require { type gssd_t; } #============= gssd_t ============== userdom_manage_user_tmp_dirs(gssd_t) [root@portello log]# sesearch --allow -s gssd_t -c dir -p write Found 6 semantic av rules: allow gssd_t var_lib_nfs_t : dir { ioctl read write create getattr setattr lock unlink link rename add_name remove_name reparent search rmdir open } ; allow gssd_t krb5_host_rcache_t : dir { ioctl read write getattr lock add_name remove_name search open } ; allow gssd_t gssd_tmp_t : dir { ioctl read write create getattr setattr lock unlink link rename add_name remove_name reparent search rmdir open } ; allow gssd_t tmp_t : dir { ioctl read write getattr lock add_name remove_name search open } ; allow gssd_t auth_cache_t : dir { ioctl read write create getattr setattr lock unlink link rename add_name remove_name reparent search rmdir open } ; allow daemon root_t : dir { ioctl read write getattr lock add_name remove_name search open } ;