Bug 705079

Summary: SELinux is preventing /usr/libexec/mysqld from 'unlink' accesses on the sock_file mysql.sock.
Product: [Fedora] Fedora Reporter: William Hickman <williamwhickman>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: rawhideCC: dwalsh, mgrepl
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: setroubleshoot_trace_hash:ea75a134a7d1fadbbf7cb00a0224fbf7d69535c118847462420deba1faa54cf8
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-16 20:02:03 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description William Hickman 2011-05-16 15:09:33 UTC
SELinux is preventing /usr/libexec/mysqld from 'unlink' accesses on the sock_file mysql.sock.

*****  Plugin catchall (100. confidence) suggests  ***************************

If you believe that mysqld should be allowed unlink access on the mysql.sock sock_file 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 mysqld /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                system_u:system_r:mysqld_t:s0
Target Context                system_u:object_r:tmp_t:s0
Target Objects                mysql.sock [ sock_file ]
Source                        mysqld
Source Path                   /usr/libexec/mysqld
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           mysql-server-5.5.10-2.fc15
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.16-23.fc15
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed)
                              2.6.38.6-26.rc1.fc15.x86_64 #1 SMP Mon May 9
                              20:45:15 UTC 2011 x86_64 x86_64
Alert Count                   10
First Seen                    Sun 15 May 2011 09:04:00 PM PDT
Last Seen                     Mon 16 May 2011 08:07:10 AM PDT
Local ID                      2e09f538-b2a6-4ef5-b56e-a80cef51763b

Raw Audit Messages
type=AVC msg=audit(1305558430.153:70): avc:  denied  { unlink } for  pid=2518 comm="mysqld" name="mysql.sock" dev=dm-1 ino=2254 scontext=system_u:system_r:mysqld_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=sock_file


type=SYSCALL msg=audit(1305558430.153:70): arch=x86_64 syscall=unlink success=no exit=EACCES a0=7fff66a3ef71 a1=2 a2=0 a3=7f723c23ed50 items=0 ppid=1146 pid=2518 auid=4294967295 uid=27 gid=27 euid=27 suid=27 fsuid=27 egid=27 sgid=27 fsgid=27 tty=(none) ses=4294967295 comm=mysqld exe=/usr/libexec/mysqld subj=system_u:system_r:mysqld_t:s0 key=(null)

Hash: mysqld,mysqld_t,tmp_t,sock_file,unlink

audit2allow

#============= mysqld_t ==============
allow mysqld_t tmp_t:sock_file unlink;

audit2allow -R

#============= mysqld_t ==============
allow mysqld_t tmp_t:sock_file unlink;

Comment 1 Miroslav Grepl 2011-05-16 20:02:03 UTC
It looks like a local modification. 

Did you change the path for "mysql.sock"?

Comment 2 William Hickman 2011-05-16 23:22:42 UTC
Yes, I had changed it to /tmp/mysql.sock, which I thought shouldn't have permissions issues with SELinux.  Sorry for the false alarm.

Comment 3 Miroslav Grepl 2011-05-17 13:13:29 UTC
We don't want to allow daemons to use /tmp dir. This dir is for users. sock/pid files should be located in the /var/run directory.