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Bug 2040015

Summary: restorecon would relabel /etc/named.conf.bak
Product: Red Hat Enterprise Linux 9 Reporter: Jiri Jaburek <jjaburek>
Component: bind-dyndb-ldapAssignee: Rafael Jeffman <rjeffman>
Status: CLOSED WONTFIX QA Contact: ipa-qe <ipa-qe>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 9.0CC: lvrabec, mmalik
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-07-12 07:28:05 UTC 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 Jiri Jaburek 2022-01-12 21:48:14 UTC
Description of problem:

$ dnf install bind     # do this first, separately

$ dnf install bind-dyndb-ldap

$ restorecon -Rvvn /etc/
Would relabel /etc/named.conf.bak from system_u:object_r:named_conf_t:s0 to system_u:object_r:etc_t:s0


Version-Release number of selected component (if applicable):
RHEL-9.0.0-20220108.3
bind-9.16.23-1.el9.x86_64
selinux-policy-34.1.20-1.el9.noarch


Additional information:

This happens because the postinst script of bind-dyndb-ldap seems to back up the config before rewriting it:

$ rpm --scripts -q bind-dyndb-ldap
postinstall scriptlet (using /bin/sh):
[ -f /etc/named.conf ] || exit 0
...
while read -r PATTERN
do
    SEDSCRIPT+="$PATTERN"
done <<EOF
/^\s*dynamic-db/,/};/ {
  ...
}
EOF
sed -i.bak -e "$SEDSCRIPT" /etc/named.conf

This is actually a sed functionality I didn't know about - using the -i argument with a suffix, but the manpage does mention it.

Comment 2 Zdenek Pytela 2022-01-14 11:09:10 UTC
selinux-policy cannot handle all backup file names.
Switching to the bind component to assess if the file can be kept with a label not matching the default file context database or if restorecon should be run.

Comment 4 Petr Menšík 2022-04-12 06:31:16 UTC
Not really sure how to handle this issue. I think having backup with named_conf_t is correct. It would allow user to mv /etc/named.conf{.bak,} if it gone wrong. On the other hand I don't expect  policy would match any common backup suffixes. Moving to bind-dyndb-ldap component to evaluate. Either call also restorecond on backup file or close it with WONTFIX.

Comment 7 RHEL Program Management 2023-07-12 07:28:05 UTC
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.