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    Subject[PATCH 04/22] crypto: arm64/aes-neonbs - add check for xts input length equal to zero
    Date
    From: Andrei Botila <andrei.botila@nxp.com>

    Standardize the way input lengths equal to 0 are handled in all skcipher
    algorithms. All the algorithms return 0 for input lengths equal to zero.

    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will@kernel.org>
    Signed-off-by: Andrei Botila <andrei.botila@nxp.com>
    ---
    arch/arm64/crypto/aes-neonbs-glue.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
    index fb507d569922..197bf24e7dae 100644
    --- a/arch/arm64/crypto/aes-neonbs-glue.c
    +++ b/arch/arm64/crypto/aes-neonbs-glue.c
    @@ -330,6 +330,9 @@ static int __xts_crypt(struct skcipher_request *req, bool encrypt,
    int first = 1;
    u8 *out, *in;

    + if (!req->cryptlen)
    + return 0;
    +
    if (req->cryptlen < AES_BLOCK_SIZE)
    return -EINVAL;

    --
    2.17.1
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