[CentOS] Help with httpd userdir recovery

m.roth at 5-cent.us m.roth at 5-cent.us
Wed Dec 28 21:24:54 UTC 2016


Robert Moskowitz wrote:
>
>
> On 12/28/2016 03:32 PM, J Martin Rushton wrote:
>>
>> On 28/12/16 20:11, Robert Moskowitz wrote:
>>>
>>> On 12/28/2016 01:53 PM, m.roth at 5-cent.us wrote:
>>>> Robert Moskowitz wrote:
>>>>> On 12/28/2016 05:11 AM, Todor Petkov wrote:
>>>>>> On Wed, Dec 28, 2016 at 5:18 AM, Robert Moskowitz
>>>>>> <rgm at htt-consult.com>
>>>>>> wrote:
>>>>>>> Which is why I wonder if there is some different config for the
>>>>>>> C7.3
>>>>>>> version
>>>>>>> of apache.
>>>>>>>
>>>>>>> Or something with the C7-arm build...
>>>>>> Can you check for SELinux warnings/errors in
>>>>>> /var/log/audit/audit.log?
>>>>> Good advice.  As I suspect the problem is with SELinux.
>>>>>
>>>>> So I tried an access.  What follows is the access_log entry, the
>>>>> error_log entry and the 3 entries in the audit.log:
>>>>>
>>>>> 192.168.160.12 - - [28/Dec/2016:11:59:10 -0500] "GET /~rgm/family/
>>>>> HTTP/1.1" 403 214 "-" "Mozilla/5.0 (X11; Fedora; Linux x86_64;
>>>>> rv:50.0)
>>>>> Gecko/20100101 Firefox/50.0"
>>>>>
>>>>> [Wed Dec 28 11:59:10.294915 2016] [autoindex:error] [pid 2141]
>>>>> (13)Permission denied: [client 192.168.160.12:56456] AH01275: Can't
>>>>> open
>>>>> directory for index: /home/rgm/public_html/family/
>>>>>
>>>>> type=AVC msg=audit(1482944350.289:339): avc:  denied  { read } for
>>>>> pid=2141 comm="httpd" name="family" dev="sda3" ino=262199
>>>>> scontext=system_u:system_r:httpd_t:s0
>>>>> tcontext=unconfined_u:object_r:httpd_user_content_t:s0 tclass=dir
>>>>> permissive=0
>>>>>
>>>>> type=SYSCALL msg=audit(1482944350.289:339): arch=40000028 syscall=322
>>>>> per=800000 success=no exit=-13 a0=ffffff9c a1=80657458 a2=a4800 a3=0
>>>>> items=0 ppid=2135 pid=2141 auid=4294967295 uid=48 gid=48 euid=48
>>>>> suid=48
>>>>> fsuid=48 egid=48 sgid=48 fsgid=48 tty=(none) ses=4294967295
>>>>> comm="httpd"
>>>>> exe="/usr/sbin/httpd" subj=system_u:system_r:httpd_t:s0 key=(null)
>>>>>
>>>>> type=PROCTITLE msg=audit(1482944350.289:339):
>>>>> proctitle=2F7573722F7362696E2F6874747064002D44464F524547524F554E44
>>>>>
>>>>>
>>>>> I will say that after enabling selinux on this image per the
>>>>> instructions of the team doing the Centos7-arm builds, I got the
>>>>> following messages when I did things like 'setsebool -P
>>>>> httpd_enable_homedirs on':
>>>>>
>>>>> [ 2273.047017] SELinux:  Class binder not defined in policy.
>>>>> [ 2273.052531] SELinux: the above unknown classes and permissions
>>>>> will
>>>>> be allowed
>>>>>
>>>>>
>>>>> So something may well not be right with my SELinux.
>>>>>
>>>> Bang. I would suggest, at this point, that you might want to set
>>>> selinux
>>>> into permissive mode, so you'll get the error messages from it, and
>>>> can
>>>> work out fixes, but will let your system operate as you intend.
>>>> setselinux 0
>>>>
>>>> Note that this is *temporary*, and will revert on reboot. To make it
>>>> permanent, you'd need to edit /etc/selinux/config.
>>> Thanks, Mark, I was just getting around to that way of thinking.
>>>
>>> The command, at least on my Centos7-arm system is
>>>
>>> setenforce 0
>>>
>>> A presto it works.  So now to figure out what is wrong with SElinux on
>>> this image.
>>>
>>> _______________________________________________
>>> CentOS mailing list
>>> CentOS at centos.org
>>> https://lists.centos.org/mailman/listinfo/centos
>> Have you got the setroubleshoot-server package installed?  For x86_64 it
>> is part of the base repository, obviously arm may differ.  The package
>> installs a "SELinux Troubleshooter" entry in the Applications/Sundry
>> menu, or it can be launched via:
>
> No GUI in the base image.  And on arm, we tend to use Xfce.
>
>> # /usr/bin/python -Es /usr/bin/sealert -s
>
> no sealert bin file, so it is off to install it.
>
>> It generates suggestions to fix SELinx issues.  Sometimes it is quite
>> useful, on other occasions it just lists vast numbers of possibilities
>> with little or no help.  On balance it is worth trying for when it does
>> help.
>
> I have never had it make useful suggestions to my on my notebook, but we
> will see...
>
> so here is what happens after I install it:
>
> # /usr/bin/python -Es /usr/bin/sealert -s
> Opps, sealert hit an error!
>
> Traceback (most recent call last):
>    File "/usr/bin/sealert", line 651, in <module>
>      import gtk
> ImportError: No module named gtk
>
> If it needs a GUI, then that won't work here.  Headless system.
>
Nahh... you want to instal setroubleshoot.

       mark




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