mirror of https://gitee.com/openkylin/linux.git
s390/crypto: xts-aes-s390 fix extra run-time crypto self tests finding
With 'extra run-time crypto self tests' enabled, the selftest for s390-xts fails with alg: skcipher: xts-aes-s390 encryption unexpectedly succeeded on test vector "random: len=0 klen=64"; expected_error=-22, cfg="random: inplace use_digest nosimd src_divs=[2.61%@+4006, 84.44%@+21, 1.55%@+13, 4.50%@+344, 4.26%@+21, 2.64%@+27]" This special case with nbytes=0 is not handled correctly and this fix now makes sure that -EINVAL is returned when there is en/decrypt called with 0 bytes to en/decrypt. Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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@ -586,6 +586,9 @@ static int xts_aes_encrypt(struct blkcipher_desc *desc,
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struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (!nbytes)
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return -EINVAL;
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if (unlikely(!xts_ctx->fc))
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return xts_fallback_encrypt(desc, dst, src, nbytes);
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@ -600,6 +603,9 @@ static int xts_aes_decrypt(struct blkcipher_desc *desc,
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struct s390_xts_ctx *xts_ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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if (!nbytes)
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return -EINVAL;
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if (unlikely(!xts_ctx->fc))
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return xts_fallback_decrypt(desc, dst, src, nbytes);
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