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Date: Mon, 6 May 2013 14:24:17 -0500
From: Kent Yoder <shpedoikal@...il.com>
To: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: Re: [PATCH] drivers/crypto/nx: fixes for multiple issues
Hi Ben, just a friendly reminder to please apply.
Thanks,
Kent
On Fri, Apr 12, 2013 at 12:13:59PM -0500, Kent Yoder wrote:
> Fixes a race on driver init with registering algorithms where the
> driver status flag wasn't being set before self testing started.
>
> Added the cra_alignmask field for CBC and ECB modes.
>
> Fixed a bug in GCM where AES block size was being used instead of
> authsize.
>
> Removed use of blkcipher_walk routines for scatterlist processing.
> Corner cases in the code prevent us from processing an entire
> scatterlist at a time and walking the buffers in block sized chunks
> turns out to be unecessary anyway.
>
> Fixed off-by-one error in saving off extra data in the sha code.
>
> Fixed accounting error for number of bytes processed in the sha code.
>
> Signed-off-by: Kent Yoder <key@...ux.vnet.ibm.com>
> ---
> Patch v3, was: drivers/crypto/nx: fix init race, alignmasks and GCM bug
>
> Applied to:
> git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git#next
>
> drivers/crypto/nx/nx-aes-cbc.c | 1 +
> drivers/crypto/nx/nx-aes-ecb.c | 1 +
> drivers/crypto/nx/nx-aes-gcm.c | 2 +-
> drivers/crypto/nx/nx-sha256.c | 8 +++++---
> drivers/crypto/nx/nx-sha512.c | 7 ++++---
> drivers/crypto/nx/nx.c | 38 +++++++-------------------------------
> 6 files changed, 19 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/crypto/nx/nx-aes-cbc.c b/drivers/crypto/nx/nx-aes-cbc.c
> index a76d4c4..35d483f 100644
> --- a/drivers/crypto/nx/nx-aes-cbc.c
> +++ b/drivers/crypto/nx/nx-aes-cbc.c
> @@ -126,6 +126,7 @@ struct crypto_alg nx_cbc_aes_alg = {
> .cra_blocksize = AES_BLOCK_SIZE,
> .cra_ctxsize = sizeof(struct nx_crypto_ctx),
> .cra_type = &crypto_blkcipher_type,
> + .cra_alignmask = 0xf,
> .cra_module = THIS_MODULE,
> .cra_init = nx_crypto_ctx_aes_cbc_init,
> .cra_exit = nx_crypto_ctx_exit,
> diff --git a/drivers/crypto/nx/nx-aes-ecb.c b/drivers/crypto/nx/nx-aes-ecb.c
> index ba5f161..7bbc9a8 100644
> --- a/drivers/crypto/nx/nx-aes-ecb.c
> +++ b/drivers/crypto/nx/nx-aes-ecb.c
> @@ -123,6 +123,7 @@ struct crypto_alg nx_ecb_aes_alg = {
> .cra_priority = 300,
> .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
> .cra_blocksize = AES_BLOCK_SIZE,
> + .cra_alignmask = 0xf,
> .cra_ctxsize = sizeof(struct nx_crypto_ctx),
> .cra_type = &crypto_blkcipher_type,
> .cra_module = THIS_MODULE,
> diff --git a/drivers/crypto/nx/nx-aes-gcm.c b/drivers/crypto/nx/nx-aes-gcm.c
> index c8109ed..6cca6c3 100644
> --- a/drivers/crypto/nx/nx-aes-gcm.c
> +++ b/drivers/crypto/nx/nx-aes-gcm.c
> @@ -219,7 +219,7 @@ static int gcm_aes_nx_crypt(struct aead_request *req, int enc)
> if (enc)
> NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
> else
> - nbytes -= AES_BLOCK_SIZE;
> + nbytes -= crypto_aead_authsize(crypto_aead_reqtfm(req));
>
> csbcpb->cpb.aes_gcm.bit_length_data = nbytes * 8;
>
> diff --git a/drivers/crypto/nx/nx-sha256.c b/drivers/crypto/nx/nx-sha256.c
> index 9767315..67024f2 100644
> --- a/drivers/crypto/nx/nx-sha256.c
> +++ b/drivers/crypto/nx/nx-sha256.c
> @@ -69,7 +69,7 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
> * 1: <= SHA256_BLOCK_SIZE: copy into state, return 0
> * 2: > SHA256_BLOCK_SIZE: process X blocks, copy in leftover
> */
> - if (len + sctx->count <= SHA256_BLOCK_SIZE) {
> + if (len + sctx->count < SHA256_BLOCK_SIZE) {
> memcpy(sctx->buf + sctx->count, data, len);
> sctx->count += len;
> goto out;
> @@ -110,7 +110,8 @@ static int nx_sha256_update(struct shash_desc *desc, const u8 *data,
> atomic_inc(&(nx_ctx->stats->sha256_ops));
>
> /* copy the leftover back into the state struct */
> - memcpy(sctx->buf, data + len - leftover, leftover);
> + if (leftover)
> + memcpy(sctx->buf, data + len - leftover, leftover);
> sctx->count = leftover;
>
> csbcpb->cpb.sha256.message_bit_length += (u64)
> @@ -130,6 +131,7 @@ static int nx_sha256_final(struct shash_desc *desc, u8 *out)
> struct nx_sg *in_sg, *out_sg;
> int rc;
>
> +
> if (NX_CPB_FDM(csbcpb) & NX_FDM_CONTINUATION) {
> /* we've hit the nx chip previously, now we're finalizing,
> * so copy over the partial digest */
> @@ -162,7 +164,7 @@ static int nx_sha256_final(struct shash_desc *desc, u8 *out)
>
> atomic_inc(&(nx_ctx->stats->sha256_ops));
>
> - atomic64_add(csbcpb->cpb.sha256.message_bit_length,
> + atomic64_add(csbcpb->cpb.sha256.message_bit_length / 8,
> &(nx_ctx->stats->sha256_bytes));
> memcpy(out, csbcpb->cpb.sha256.message_digest, SHA256_DIGEST_SIZE);
> out:
> diff --git a/drivers/crypto/nx/nx-sha512.c b/drivers/crypto/nx/nx-sha512.c
> index 3177b8c..08eee11 100644
> --- a/drivers/crypto/nx/nx-sha512.c
> +++ b/drivers/crypto/nx/nx-sha512.c
> @@ -69,7 +69,7 @@ static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
> * 1: <= SHA512_BLOCK_SIZE: copy into state, return 0
> * 2: > SHA512_BLOCK_SIZE: process X blocks, copy in leftover
> */
> - if ((u64)len + sctx->count[0] <= SHA512_BLOCK_SIZE) {
> + if ((u64)len + sctx->count[0] < SHA512_BLOCK_SIZE) {
> memcpy(sctx->buf + sctx->count[0], data, len);
> sctx->count[0] += len;
> goto out;
> @@ -110,7 +110,8 @@ static int nx_sha512_update(struct shash_desc *desc, const u8 *data,
> atomic_inc(&(nx_ctx->stats->sha512_ops));
>
> /* copy the leftover back into the state struct */
> - memcpy(sctx->buf, data + len - leftover, leftover);
> + if (leftover)
> + memcpy(sctx->buf, data + len - leftover, leftover);
> sctx->count[0] = leftover;
>
> spbc_bits = csbcpb->cpb.sha512.spbc * 8;
> @@ -168,7 +169,7 @@ static int nx_sha512_final(struct shash_desc *desc, u8 *out)
> goto out;
>
> atomic_inc(&(nx_ctx->stats->sha512_ops));
> - atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo,
> + atomic64_add(csbcpb->cpb.sha512.message_bit_length_lo / 8,
> &(nx_ctx->stats->sha512_bytes));
>
> memcpy(out, csbcpb->cpb.sha512.message_digest, SHA512_DIGEST_SIZE);
> diff --git a/drivers/crypto/nx/nx.c b/drivers/crypto/nx/nx.c
> index c767f23..bbdab6e 100644
> --- a/drivers/crypto/nx/nx.c
> +++ b/drivers/crypto/nx/nx.c
> @@ -211,44 +211,20 @@ int nx_build_sg_lists(struct nx_crypto_ctx *nx_ctx,
> {
> struct nx_sg *nx_insg = nx_ctx->in_sg;
> struct nx_sg *nx_outsg = nx_ctx->out_sg;
> - struct blkcipher_walk walk;
> - int rc;
> -
> - blkcipher_walk_init(&walk, dst, src, nbytes);
> - rc = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
> - if (rc)
> - goto out;
>
> if (iv)
> - memcpy(iv, walk.iv, AES_BLOCK_SIZE);
> + memcpy(iv, desc->info, AES_BLOCK_SIZE);
>
> - while (walk.nbytes) {
> - nx_insg = nx_build_sg_list(nx_insg, walk.src.virt.addr,
> - walk.nbytes, nx_ctx->ap->sglen);
> - nx_outsg = nx_build_sg_list(nx_outsg, walk.dst.virt.addr,
> - walk.nbytes, nx_ctx->ap->sglen);
> -
> - rc = blkcipher_walk_done(desc, &walk, 0);
> - if (rc)
> - break;
> - }
> -
> - if (walk.nbytes) {
> - nx_insg = nx_build_sg_list(nx_insg, walk.src.virt.addr,
> - walk.nbytes, nx_ctx->ap->sglen);
> - nx_outsg = nx_build_sg_list(nx_outsg, walk.dst.virt.addr,
> - walk.nbytes, nx_ctx->ap->sglen);
> -
> - rc = 0;
> - }
> + nx_insg = nx_walk_and_build(nx_insg, nx_ctx->ap->sglen, src, 0, nbytes);
> + nx_outsg = nx_walk_and_build(nx_outsg, nx_ctx->ap->sglen, dst, 0, nbytes);
>
> /* these lengths should be negative, which will indicate to phyp that
> * the input and output parameters are scatterlists, not linear
> * buffers */
> nx_ctx->op.inlen = (nx_ctx->in_sg - nx_insg) * sizeof(struct nx_sg);
> nx_ctx->op.outlen = (nx_ctx->out_sg - nx_outsg) * sizeof(struct nx_sg);
> -out:
> - return rc;
> +
> + return 0;
> }
>
> /**
> @@ -454,6 +430,8 @@ static int nx_register_algs(void)
> if (rc)
> goto out;
>
> + nx_driver.of.status = NX_OKAY;
> +
> rc = crypto_register_alg(&nx_ecb_aes_alg);
> if (rc)
> goto out;
> @@ -498,8 +476,6 @@ static int nx_register_algs(void)
> if (rc)
> goto out_unreg_s512;
>
> - nx_driver.of.status = NX_OKAY;
> -
> goto out;
>
> out_unreg_s512:
> --
> 1.7.11.7
>
> --
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