Bug 495533 - SELinux: text relocation issue with _pysyncml.so
SELinux: text relocation issue with _pysyncml.so
Status: CLOSED DUPLICATE of bug 485980
Product: Fedora
Classification: Fedora
Component: taskcoach (Show other bugs)
10
All Linux
low Severity high
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Assigned To: Rakesh Pandit
Fedora Extras Quality Assurance
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2009-04-13 14:02 EDT by Matthew Farrellee
Modified: 2009-09-23 07:06 EDT (History)
2 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2009-09-23 07:06:07 EDT
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Matthew Farrellee 2009-04-13 14:02:07 EDT
Description of problem:

Whenever I start task coach I get this SELinux alert:

Summary

SELinux is preventing taskcoach from loading /usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so which requires text relocation.

Detailed Description

The taskcoach application attempted to load /usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so which requires text relocation. This is a potential security problem. Most libraries do not need this permission. Libraries are sometimes coded incorrectly and request this permission. The SELinux Memory Protection Tests web page explains how to remove this requirement. You can configure SELinux temporarily to allow /usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so to use relocation as a workaround, until the library is fixed. Please file a bug report against this package.

Allowing Access

If you trust /usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so to run correctly, you can change the file context to textrel_shlib_t. "chcon -t textrel_shlib_t '/usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so'" You must also change the default file context files on the system in order to preserve them even on a full relabel. "semanage fcontext -a -t textrel_shlib_t '/usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so'"

Fix Command

chcon -t textrel_shlib_t '/usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so'

Additional Information
Source Context:  unconfined_u:unconfined_r:unconfined_t:s0
Target Context:  system_u:object_r:lib_t:s0
Target Objects:  /usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so [ file ]
Source:  taskcoachSource 
Path:  /usr/bin/python
Port:  <Unknown>
Host:  robin.local
Source RPM 
Packages:  python-2.5.2-1.fc10
Target RPM Packages:  taskcoach-0.71.5-1.fc10
Policy RPM:  selinux-policy-3.5.13-53.fc10
Selinux Enabled:  True
Policy Type:  targeted
MLS Enabled:  True
Enforcing Mode:  Enforcing
Plugin Name:  allow_execmod

Raw Audit Messages :node=robin.local type=AVC msg=audit(1239642555.571:2304): avc: denied { execmod } for pid=31104 comm="taskcoach" path="/usr/lib/python2.5/site-packages/taskcoachlib/bin.in/linux/_pysyncml.so" dev=dm-0 ino=430772 scontext=unconfined_u:unconfined_r:unconfined_t:s0 tcontext=system_u:object_r:lib_t:s0 tclass=file 

node=robin.local type=SYSCALL msg=audit(1239642555.571:2304): arch=40000003 syscall=125 success=no exit=-13 a0=6d1a000 a1=8b000 a2=5 a3=bff3a0d0 items=0 ppid=1 pid=31104 auid=500 uid=500 gid=501 euid=500 suid=500 fsuid=500 egid=501 sgid=501 fsgid=501 tty=(none) ses=4 comm="taskcoach" exe="/usr/bin/python" subj=unconfined_u:unconfined_r:unconfined_t:s0 key=(null) 

Version-Release number of selected component (if applicable):

$ rpm -q taskcoach
taskcoach-0.71.5-1.fc10.noarch

$ rpm -qa | grep -i selinux
libselinux-debuginfo-2.0.73-1.fc10.i386
selinux-policy-doc-3.5.13-53.fc10.noarch
selinux-policy-3.5.13-53.fc10.noarch
selinux-doc-1.26-1.1.noarch
selinux-policy-targeted-3.5.13-53.fc10.noarch
libselinux-devel-2.0.78-1.fc10.i386
libselinux-2.0.78-1.fc10.i386
libselinux-utils-2.0.78-1.fc10.i386
selinux-policy-minimum-3.5.13-53.fc10.noarch
libselinux-python-2.0.78-1.fc10.i386
Comment 1 Eric Paris 2009-04-13 14:31:52 EDT
http://people.redhat.com/drepper/textrelocs.html

explains what the denial is.  99% of the time the right fix is for the pacakage to fix their build flags to include -fpic.....
Comment 2 Rakesh Pandit 2009-09-23 07:06:07 EDT

*** This bug has been marked as a duplicate of bug 485980 ***

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