SELinux blocking Samba share mounting?

[Steven Stromer]

Hi,

I'm starting to migrate a few Fedora boxes over to the latest version of CentOS 5 running the latest version of samba:

[~]# smbstatus
Samba version 3.0.28-1.el5_2.1 


However, I am having a hard time getting SELinux to permit the mounting of shares on the first CentOS box. Disabling SELinux permits the shares to mount without problem:

[~]# setenforce 1
[~]# mount -t cifs //192.168.10.3/PHFiles /mnt/samba -o username=****,password=****,rw
retrying with upper case share name
mount error 6 = No such device or address
[~]# setenforce 0
[~]# mount -t cifs //192.168.10.3/PHFiles /mnt/samba -o username=****,password=****,rw
[~]# ls -la /mnt/samba/
total 8
d---rws---+ 6 samba       samba          0 Feb 10 11:17 .
drwxr-xr-x  3 root        root        4096 Feb 12 11:13 ..
d---rws---+ 2 technology  technology     0 Feb 10 11:14 Computing
d---rws---+ 2 development development    0 Feb 10 11:17 Development
d---rws---+ 2 root        public         0 Feb 10 11:16 Marketing & Design
d---rws---+ 2 root        public         0 Feb 10 11:14 Public Computing
[~]# umount /mnt/samba/
[~]# setenforce 1


Installed policy version is:
selinux-policy.noarch              2.4.6-137.1.el5       
selinux-policy-targeted.noarch     2.4.6-137.1.el5


The two shared directories are:

[~]# ls -laZ /home/server1/PHFiles/
d---rws---+ samba       samba       system_u:object_r:samba_share_t  .
drwxr-xr-x  root        root        root:object_r:user_home_dir_t    ..
d---rws---+ technology  technology  root:object_r:samba_share_t      Computing
d---rws---+ development development root:object_r:samba_share_t      Development
d---rws---+ root        public      root:object_r:samba_share_t      Marketing & Design
d---rws---+ root        public      root:object_r:samba_share_t      Public Computing

and

[~]# ls -laZ /var/www/html
d---rwsr-x+ development development system_u:object_r:public_content_rw_t .
drwxr-xr-x  root        root        system_u:object_r:httpd_sys_content_t ..
----rwxr-x+ development development root:object_r:public_content_rw_t .DS_Store
d---rwsr-x+ development development root:object_r:public_content_rw_t private
d---rwsr-x+ development development root:object_r:public_content_rw_t public

(I am aware that my permissions seem a bit untraditional. I am running an experiment with extended ACL configuration on samba shares. However, I do not believe this to have any bearing on my present problems, as I have numerous other production servers running with these permissions under SELinux, and, again, turning SELinux off resolves my problems instantly.)


The following has been executed with no apparent effect:
setsebool -P allow_smbd_anon_write=1


The following have been executed with no apparent effect (so these have been turned back off):
setsebool -P smbd_disable_trans=1
setsebool -P nmbd_disable_trans=1


I've added the new contexts to file_contexts, and executed 'restorecon -R' to the two shared directories:
/home/server1/PHFiles(/.*)? -- system_u:object_r:samba_share_t
/var/www/html(/.*)? -- system_u:object_r:public_content_rw_t


setroubleshoot-server is installed, but no AVC denials are reported to /var/log/messages. Instead, when SELinux is enforcing, I get the error:
smbd[11852]:   '/home/server1/PHFiles' does not exist or permission denied when connecting to [PHFiles] Error was Permission denied


And, finally, I've rebooted. All to no avail. Any assistance would be much appreciated!