Bug 1391857 - fixfiles -C verify is changing file contexts
Summary: fixfiles -C verify is changing file contexts
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: policycoreutils
Version: 6.9
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Petr Lautrbach
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On: 1360969
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-11-04 09:21 UTC by Dalibor Pospíšil
Modified: 2017-01-26 15:22 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1360969
Environment:
Last Closed: 2017-01-26 15:22:28 UTC
Target Upstream Version:


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Description Dalibor Pospíšil 2016-11-04 09:21:57 UTC
+++ This bug was initially created as a clone of Bug #1360969 +++

Description of problem:
When using the -C option for fixfiles, the verify and check commands (which are supposed to not change any filesystem labels) actually *do* modify labels.

Version-Release number of selected component (if applicable):
policycoreutils-2.0.83-30.1.el6_8.x86_64

How reproducible:
somewhat easily

Steps to Reproduce:
1. Make a fake version of /etc/selinux/targeted/contexts/files/file_contexts with rules for /etc removed, so that when you pass it to fixfiles -C it will try to relabel /etc:
cp /etc/selinux/targeted/contexts/files/file_contexts file_contexts_dummy
sed -i -e '/^\/etc/d' file_contexts_dummy
2. Make a mislabelled file in /etc:
touch /etc/relabelthis
chcon -t admin_home_t /etc/relabelthis
3. Run: fixfiles -C file_contexts_dummy check
or: fixfiles -C file_contexts_dummy verify

Actual results:
Prints:
/sbin/restorecon reset /etc/relabelthis context unconfined_u:object_r:admin_home_t:s0->unconfined_u:object_r:etc_t:s0

and then file context is actually changed:
-rw-r--r--. root root unconfined_u:object_r:etc_t:s0   /etc/relabelthis

Expected results:
Should print but not change file context.

Additional info:
Seems to be because -n is not being passed down to restorecon properly in the code path for -C. This patch fixes it:

Comment 1 Petr Lautrbach 2017-01-05 14:17:30 UTC
Do you consider this bug to be a high severity issue? Otherwise given that RHEL-6 is already in production phase 2, we won't fix it. It's already fixed in RHEL-7.3.

Comment 2 Dalibor Pospíšil 2017-01-26 15:18:48 UTC
As long as there is no customer case I think we can close this bug if you consider this issue as unimportant.


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