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Bug 1784448

Summary: clevis luks bind writes to inactive slot if wrong password is given (LUKS1)
Product: Red Hat Enterprise Linux 8 Reporter: Sergio Correia <scorreia>
Component: clevisAssignee: Sergio Correia <scorreia>
Status: CLOSED ERRATA QA Contact: Martin Zelený <mzeleny>
Severity: high Docs Contact:
Priority: medium    
Version: 8.2CC: dapospis, mzeleny, scorreia
Target Milestone: rcKeywords: Triaged
Target Release: 8.0Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: clevis-13-1.el8 Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-11-04 03:09:18 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 Sergio Correia 2019-12-17 13:33:01 UTC
Description of problem:
This is similar to BZ#1672371 reported for Fedora.

When binding a pin to a device, we are asked to provide the LUKS password; if the password is given incorrectly and the device is a LUKS1 device, we will end up writing metadata to an inactive LUKSMeta slot.

Afterwards, if we try again to bind and this time provide a correct password, we will still get an error when saving the metadata, which effectively prevents us from adding new bindings.

Version-Release number of selected component (if applicable):
clevis-luks-11-2.el8.x86_64

How reproducible: always


Steps to Reproduce:
1. Bind it with "sudo clevis luks bind -d /dev/luks1-device tpm2 {}" (any pin is OK here; use tang if no TPM2 is available)
2. Give a wrong password when asked for the existing LUKS password.
3. check the LUKSMeta slots

Actual results:
# luksmeta -d /dev/luks1-device show
0   active empty
1 inactive cb6e8904-81ff-40da-a84a-07ab9ab5715e
2 inactive empty
3 inactive empty
4 inactive empty
5 inactive empty
6 inactive empty
7 inactive empty


Expected results:
# luksmeta -d /dev/luks1-device show
0   active empty
1 inactive empty
2 inactive empty
3 inactive empty
4 inactive empty
5 inactive empty
6 inactive empty
7 inactive empty

Comment 1 Martin Zelený 2020-04-24 11:20:06 UTC
AC: After providing wrong password in 'clevis luks bind' operation, the used slot will remain empty.

Comment 9 errata-xmlrpc 2020-11-04 03:09:18 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 (clevis 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/RHBA-2020:4701