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crypto: simd - correctly take reqsize of wrapped skcipher into account

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The simd wrapper's skcipher request context structure consists
of a single subrequest whose size is taken from the subordinate
skcipher. However, in simd_skcipher_init(), the reqsize that is
retrieved is not from the subordinate skcipher but from the
cryptd request structure, whose size is completely unrelated to
the actual wrapped skcipher.

Reported-by: Qian Cai <cai@gmx.us>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Qian Cai <cai@gmx.us>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-11-08 23:55:16 +01:00 committed by Herbert Xu
parent 0b0cf6af3f
commit 508a1c4df0
1 changed files with 3 additions and 2 deletions
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5
crypto/simd.c
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@ -124,8 +124,9 @@ static int simd_skcipher_init(struct crypto_skcipher *tfm)
ctx->cryptd_tfm = cryptd_tfm;
reqsize = sizeof(struct skcipher_request);
reqsize += crypto_skcipher_reqsize(&cryptd_tfm->base);
reqsize = crypto_skcipher_reqsize(cryptd_skcipher_child(cryptd_tfm));
reqsize = max(reqsize, crypto_skcipher_reqsize(&cryptd_tfm->base));
reqsize += sizeof(struct skcipher_request);
crypto_skcipher_set_reqsize(tfm, reqsize);