Bug 702943

Summary: SELinux is preventing /home/tom/sunken/blender-svn/install/linux2/blender from using the 'execmem' accesses on a process.
Product: [Fedora] Fedora Reporter: Tom <thomasbelvin>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED CANTFIX 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:6e0554060e0716e0eaa2b788efac995a05a460706a6d85291918513c9482bac7
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-09 15:44:13 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 Tom 2011-05-08 14:48:16 UTC
SELinux is preventing /home/tom/sunken/blender-svn/install/linux2/blender from using the 'execmem' accesses on a process.

*****  Plugin catchall_boolean (47.5 confidence) suggests  *******************

If you want to allow unconfined executables to make their stack executable.  This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla
Then you must tell SELinux about this by enabling the 'allow_execstack' boolean.
Do
setsebool -P allow_execstack 1

*****  Plugin catchall_boolean (47.5 confidence) suggests  *******************

If you want to allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla
Then you must tell SELinux about this by enabling the 'allow_execmem' boolean.
Do
setsebool -P allow_execmem 1

*****  Plugin catchall (6.38 confidence) suggests  ***************************

If you believe that blender should be allowed execmem access on processes labeled unconfined_t 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 blender /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Context                unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1
                              023
Target Objects                Unknown [ process ]
Source                        blender
Source Path                   /home/tom/sunken/blender-
                              svn/install/linux2/blender
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
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) 2.6.38.5-22.fc15.x86_64 #1 SMP Mon
                              May 2 19:28:55 UTC 2011 x86_64 x86_64
Alert Count                   1
First Seen                    Sun 08 May 2011 10:46:22 AM EDT
Last Seen                     Sun 08 May 2011 10:46:22 AM EDT
Local ID                      6eef23b5-805e-45d2-bb8d-a70fecf68db2

Raw Audit Messages
type=AVC msg=audit(1304865982.392:249): avc:  denied  { execmem } for  pid=5710 comm="blender" scontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 tclass=process


type=SYSCALL msg=audit(1304865982.392:249): arch=x86_64 syscall=mmap success=no exit=EACCES a0=0 a1=80000 a2=7 a3=22 items=0 ppid=5697 pid=5710 auid=500 uid=500 gid=500 euid=500 suid=500 fsuid=500 egid=500 sgid=500 fsgid=500 tty=pts2 ses=5 comm=blender exe=/home/tom/sunken/blender-svn/install/linux2/blender subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 key=(null)

Hash: blender,unconfined_t,unconfined_t,process,execmem

audit2allow

#============= unconfined_t ==============
#!!!! This avc can be allowed using one of the these booleans:
#     allow_execstack, allow_execmem

allow unconfined_t self:process execmem;

audit2allow -R

#============= unconfined_t ==============
#!!!! This avc can be allowed using one of the these booleans:
#     allow_execstack, allow_execmem

allow unconfined_t self:process execmem;

Comment 1 Daniel Walsh 2011-05-09 15:44:13 UTC
If you want to trust apps that you download, turn the check off.

# setsebool -P allow_execmem 1