Bug 2228480

Summary:	[RHEL-9] Anaconda rewrites /var/log/anaconda logs and changes selinux context on files when running in rescue mode
Product:	Red Hat Enterprise Linux 9	Reporter:	Jan Stodola <jstodola>
Component:	anaconda	Assignee:	anaconda-maint
Status:	NEW ---	QA Contact:	Release Test Team <release-test-team>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	9.2	Keywords:	Triaged
Target Milestone:	rc
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:	2228450	Environment:
Last Closed:		Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jan Stodola 2023-08-02 12:38:27 UTC

The problem also exists on RHEL-9.2.

+++ This bug was initially created as a clone of Bug #2228450 +++

Description of problem:
When the installer is executed in rescue mode and the existing system is mounted by anaconda in read-write mode, the logs stored in /mnt/sysroot/var/log/anaconda are rewritten and SELinux context of some files may be changed. This happens right after anaconda mounts the detected system.

In other words, %post scripts from https://github.com/rhinstaller/anaconda/tree/rhel-8/data/post-scripts are executed even in rescue mode, which is not expected.

Version-Release number of selected component (if applicable):
RHEL-8.8 GA

How reproducible:
Always

Steps to Reproduce:
1. Install a RHEL system
2. Create a file in /root with an unexpected SELinux context:
# touch /root/my_file
# chcon -t httpd_sys_content_t /root/my_file
3. Start the installer in rescue mode ("inst.rescue" on the kernel command line)
4. Let anaconda find and mount the existing partitions
5. Check logs in /mnt/sysroot/var/log/anaconda and SELinux context of /mnt/sysroot/root/my_file

Actual results:
/mnt/sysroot/var/log/anaconda contains logs from the current rescue mode
The SELinux context of /mnt/sysroot/root/my_file is reset to the default

Expected results:
No changes made in the system being rescued.

Additional info:
A workaround to avoid rewriting /var/log/anaconda is to append "inst.nosave=all" on the kernel command line when starting rescue mode.