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Bug 2038810 - RFE: backport of --secontext=mismatch functionality
Summary: RFE: backport of --secontext=mismatch functionality
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: strace
Version: 8.5
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Eugene Syromiatnikov
QA Contact: Jesus Checa
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-10 07:44 UTC by Renaud Métrich
Modified: 2022-05-15 07:13 UTC (History)
3 users (show)

Fixed In Version: strace-5.13-3.el8
Doc Type: Enhancement
Doc Text:
.The `strace` utility can now display mismatches between the actual SELinux contexts and the definitions extracted from the SELinux context database An existing `--secontext` option of `strace` has been extended with the `mismatch` parameter. This parameter enables to print the expected context along with the actual one upon mismatch only. The output is separated by double exclamation marks (`!!`), first the actual context, then the expected one. In the examples below, the `full,mismatch` parameters print the expected full context along with the actual one because the user part of the contexts mismatches. However, when using a solitary `mismatch`, it only checks the type part of the context. The expected context is not printed because the type part of the contexts matches. ---- [...] $ strace --secontext=full,mismatch -e statx stat /home/user/file statx(AT_FDCWD, "/home/user/file" [system_u:object_r:user_home_t:s0!!unconfined_u:object_r:user_home_t:s0], ... $ strace --secontext=mismatch -e statx stat /home/user/file statx(AT_FDCWD, "/home/user/file" [user_home_t:s0], ... ---- SELinux context mismatches often cause access control issues associated with SELinux. The mismatches printed in the system call traces can significantly expedite the checks of SELinux context correctness. The system call traces can also explain specific kernel behavior with respect to access control checks.
Clone Of:
: 2038965 2038991 2038992 (view as bug list)
Environment:
Last Closed: 2022-05-10 15:20:52 UTC
Type: Bug
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-107252 0 None None None 2022-01-10 07:47:38 UTC
Red Hat Product Errata RHEA-2022:2026 0 None None None 2022-05-10 15:20:57 UTC

Description Renaud Métrich 2022-01-10 07:44:25 UTC
Description of problem:

Please backport "--secontext=mismatch" functionality to system's strace on RHEL8:
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------
commit ca1aa96f2b00a0dda41506c8eb15bed265066e3a
Author: Renaud Métrich <rmetrich>
Date:   Tue Oct 5 08:36:22 2021 +0200
-------- 8< ---------------- 8< ---------------- 8< ---------------- 8< --------

Having this in system's strace will greatly enhance troubleshooting of SELinux issues, through not requiring to verify the contexts against expected ones.


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

strace-5.7-3


How reproducible:

N/A

Comment 7 errata-xmlrpc 2022-05-10 15:20:52 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (strace bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2022:2026


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