On Wed, Jan 08, 2020 at 04:06:46PM +1100, Daniel Axtens wrote:
> When the kernel XTS implementation was extended to deal with ciphertext
> stealing in commit 8083b1bf8163 ("crypto: xts - add support for ciphertext
> stealing"), a check was added to reject inputs that were too short.
>
> However, in the vmx enablement - commit 239668419349 ("crypto: vmx/xts -
> use fallback for ciphertext stealing"), that check wasn't added to the
> vmx implementation. This disparity leads to errors like the following:
>
> alg: skcipher: p8_aes_xts encryption unexpectedly succeeded on test vector
> "random: len=0 klen=64"; expected_error=-22, cfg="random: inplace may_sleep
> use_finup src_divs=[<flush>66.99%@+10, 33.1%@alignmask+1155]"
>
> Return -EINVAL if asked to operate with a cryptlen smaller than the AES
> block size. This brings vmx in line with the generic implementation.
>
> Reported-by: Erhard Furtner <erhar...@mailbox.org>
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=206049
> Fixes: 239668419349 ("crypto: vmx/xts - use fallback for ciphertext stealing")
> Cc: Ard Biesheuvel <ard.biesheu...@linaro.org>
> Cc: sta...@vger.kernel.org # v5.4+
> Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
> [dja: commit message]
> Signed-off-by: Daniel Axtens <d...@axtens.net>
> ---
> drivers/crypto/vmx/aes_xts.c | 3 +++
> 1 file changed, 3 insertions(+)
Patch applied. Thanks.
--
Email: Herbert Xu <herb...@gondor.apana.org.au>
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