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Description of problem:
 cryptsetup --header parameter and device parameter points to same device corrupts the data, It must not even intialize encryption operation

Version-Release number of selected component (if applicable):
cryptsetup-2.4.3-5.el9.x86_64
5.14.0-202.el9.x86_64

How reproducible:


Steps to Reproduce:
1.  echo 'redhatredhat' |cryptsetup reencrypt  --encrypt /dev/loop0  --header  /dev/loop0  --type luks2  -q
2.
3.

Actual results:
pass

Expected results:
failed

Additional info:



[root@pnate-client-01 ~]# 
[root@pnate-client-01 ~]# echo 'redhatredhat' |cryptsetup reencrypt  --encrypt /dev/loop0  --header  /dev/loop0  --type luks2  -q
[root@pnate-client-01 ~]# $?
-bash: 0: command not found
[root@pnate-client-01 ~]# uname -a
Linux pnate-client-01.sqe.lab.eng.bos.redhat.com 5.14.0-202.el9.x86_64 #1 SMP PREEMPT_DYNAMIC Mon Nov 28 08:49:47 EST 2022 x86_64 x86_64 x86_64 GNU/Linux
[root@pnate-client-01 ~]# 


also reproduce with cryptsetup-2.6.0-1.el9.x86_64

Fixed in upstream with: https://gitlab.com/cryptsetup/cryptsetup/-/merge_requests/463

Hi,

[root@storageqe-104 ~]# echo 'redhatredhat' |cryptsetup reencrypt  --encrypt /dev/loop0  --header  /dev/loop0  --type luks2  -q
Encryption without detached header (--header) is not possible without data device size reduction (--reduce-device-size).
[root@storageqe-104 ~]# $?
-bash: 1: command not found
[root@storageqe-104 ~]# 

test pass with fixed package,

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 (cryptsetup 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-2023:2534