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Descriptionguazhang@redhat.com
2021-06-16 13:45:07 UTC
Description of problem:
cryptsetup regression testing failed and found the error, please have a look if hit a bug
Version-Release number of selected component (if applicable):
integritysetup-2.3.5-4.el9.x86_64
cryptsetup-2.3.5-4.el9.x86_64
How reproducible:
100%
Steps to Reproduce:
1. integritysetup -q format --debug --progress-frequency '5' --integrity 'hmac-sha256' --tag-size '20' --journal-size '4096' --integrity-key-size '20' --integrity-key-file '/home/mykeyfile3n8C' --sector-size '4096' /dev/loop1
2.integritysetup -q open --integrity-recalculate --integrity 'hmac-sha256' --integrity-key-size '20' --integrity-key-file '/home/mykeyfile3n8C' /dev/loop1 devloop1
device-mapper: reload ioctl on devloop1 (253:4) failed: Operation not supported
Kernel refuses to activate insecure recalculate option (see legacy activation options to override).
Jun 16 09:33:41 dell-r430-26 kernel: async_tx: api initialized (async)
Jun 16 09:33:41 dell-r430-26 kernel: xor: automatically using best checksumming function avx
Jun 16 09:37:02 dell-r430-26 kernel: device-mapper: table: 253:4: integrity: Recalculating with HMAC is disabled for security reasons - if you really need it, use the argument "legacy_recalculate"
Jun 16 09:37:02 dell-r430-26 kernel: device-mapper: ioctl: error adding target to table
Actual results:
run cmd failed
Expected results:
run pass
Additional info:
(In reply to guazhang from comment #0)
> Jun 16 09:37:02 dell-r430-26 kernel: device-mapper: table: 253:4: integrity:
> Recalculating with HMAC is disabled for security reasons - if you really
> need it, use the argument "legacy_recalculate"
> Jun 16 09:37:02 dell-r430-26 kernel: device-mapper: ioctl: error adding
> target to table
>
Kernel provides pretty good hint here. Anyway, there was a security bug in dm-integrity with regard to integrity recalculate flag and HMAC. The referenced legacy_recalculate flag can be set with user's discretion in cryptsetup-2.3.6 and later.
Comment 2guazhang@redhat.com
2021-08-19 12:35:07 UTC
Hi,
I tested the fixed package and found the parameter "integrity-recalculate" still don't support.
Is it expected ?
cryptsetup-2.4.0-1.el9.x86_64
# integritysetup -q open --integrity-recalculate --integrity 'hmac-sha256' --integrity-key-size '20' --integrity-key-file '/home/mykeyfile3n8C' /dev/loop0 devloop0
device-mapper: reload ioctl on devloop0 (253:0) failed: Operation not supported
Kernel refuses to activate insecure recalculate option (see legacy activation options to override).
You need to replace --integrity-recalculate with --integrity-legacy-recalculate.
But basically the recalculation with hmac is strongly discouraged for security reasons and you don't have to test recalculate scenario with hmac anymore. The legacy flag is there so that users can re-enable it temporarily if they need to migrate data away.
Comment 4guazhang@redhat.com
2021-08-19 14:32:16 UTC
Hi,
the package cryptsetup-2.4.0-1.el9 has tested pass.
Comment 8guazhang@redhat.com
2021-08-22 10:49:47 UTC