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    Subject[PATCH 4.9 145/145] crypto: s5p-sss - Fix kernel Oops in AES-ECB mode
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Kamil Konieczny <k.konieczny@partner.samsung.com>

    commit c927b080c67e3e97193c81fc1d27f4251bf4e036 upstream.

    In AES-ECB mode crypt is done with key only, so any use of IV
    can cause kernel Oops. Use IV only in AES-CBC and AES-CTR.

    Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
    Reported-by: Anand Moon <linux.amoon@gmail.com>
    Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
    Tested-by: Anand Moon <linux.amoon@gmail.com>
    Cc: stable@vger.kernel.org # can be applied after commit 8f9702aad138
    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/crypto/s5p-sss.c | 12 +++++++++---
    1 file changed, 9 insertions(+), 3 deletions(-)

    --- a/drivers/crypto/s5p-sss.c
    +++ b/drivers/crypto/s5p-sss.c
    @@ -542,15 +542,21 @@ static void s5p_aes_crypt_start(struct s
    uint32_t aes_control;
    unsigned long flags;
    int err;
    + u8 *iv;

    aes_control = SSS_AES_KEY_CHANGE_MODE;
    if (mode & FLAGS_AES_DECRYPT)
    aes_control |= SSS_AES_MODE_DECRYPT;

    - if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC)
    + if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) {
    aes_control |= SSS_AES_CHAIN_MODE_CBC;
    - else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR)
    + iv = req->info;
    + } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) {
    aes_control |= SSS_AES_CHAIN_MODE_CTR;
    + iv = req->info;
    + } else {
    + iv = NULL; /* AES_ECB */
    + }

    if (dev->ctx->keylen == AES_KEYSIZE_192)
    aes_control |= SSS_AES_KEY_SIZE_192;
    @@ -581,7 +587,7 @@ static void s5p_aes_crypt_start(struct s
    goto outdata_error;

    SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
    - s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen);
    + s5p_set_aes(dev, dev->ctx->aes_key, iv, dev->ctx->keylen);

    s5p_set_dma_indata(dev, dev->sg_src);
    s5p_set_dma_outdata(dev, dev->sg_dst);

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