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From:   Shinichiro Kawasaki <shinichiro.kawasaki@wdc.com>
To:     "linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>
CC:     "dm-devel@redhat.com" <dm-devel@redhat.com>,
        Herbert Xu <herbert@gondor.apana.org.au>
Subject: [bug report] dm-crypt setup failure with next-20230929 kernel
Thread-Topic: [bug report] dm-crypt setup failure with next-20230929 kernel
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Date:   Mon, 2 Oct 2023 08:08:23 +0000
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Hello there,

I ran the command below on top of linux-next kernel with the tag next-20230=
929,
and observed dm-crypt setup failed.

  $ sudo cryptsetup open --type=3Dplain --key-file=3D/dev/zero /dev/nullb0 =
test
  device-mapper: reload ioctl on test (253:0) failed: No such file or direc=
tory

Kernel reported an error related to crypto.

  device-mapper: table: 253:0: crypt: Error allocating crypto tfm (-ENOENT)
  device-mapper: ioctl: error adding target to table

The failure was observed with null_blk and SATA HDD. It looks independent o=
f
block device type.

I bisected and found that the commit 31865c4c4db2 ("crypto: skcipher - Add
lskcipher") is the trigger. I reverted the commit from next-20230929 togeth=
er
with other four dependent commits below, and observed the failure disappear=
s.

  705b52fef3c7 ("crypto: cbc - Convert from skcipher to lskcipher")
  32a8dc4afcfb ("crypto: ecb - Convert from skcipher to lskcipher")
  3dfe8786b11a ("crypto: testmgr - Add support for lskcipher algorithms")
  8aee5d4ebd11 ("crypto: lskcipher - Add compatibility wrapper around ECB")

Is this a known issue?=