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authorPatrick McHardy <kaber@trash.net>2008-11-24 22:01:42 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 11:01:54 +1100
commit5df4c0c671bbb425e4a77dde5f51869aeebebd67 (patch)
treea302e5c58642b8c22f0ceafbdfcba100f8c96c79 /drivers/crypto
parent3416158680d5ba6fdb939e5bb52a8eba1ad5c027 (diff)
downloadlinux-linaro-stable-5df4c0c671bbb425e4a77dde5f51869aeebebd67.tar.gz
crypto: hifn_795x - Fix request context corruption
HIFN uses the transform context to store per-request data, which breaks when more than one request is outstanding. Move per request members from struct hifn_context to a new struct hifn_request_context and convert the code to use this. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/hifn_795x.c100
1 files changed, 56 insertions, 44 deletions
diff --git a/drivers/crypto/hifn_795x.c b/drivers/crypto/hifn_795x.c
index 2b4940bc8356..97a77d7baca4 100644
--- a/drivers/crypto/hifn_795x.c
+++ b/drivers/crypto/hifn_795x.c
@@ -657,9 +657,15 @@ struct ablkcipher_walk
struct hifn_context
{
- u8 key[HIFN_MAX_CRYPT_KEY_LENGTH], *iv;
+ u8 key[HIFN_MAX_CRYPT_KEY_LENGTH];
struct hifn_device *dev;
- unsigned int keysize, ivsize;
+ unsigned int keysize;
+};
+
+struct hifn_request_context
+{
+ u8 *iv;
+ unsigned int ivsize;
u8 op, type, mode, unused;
struct ablkcipher_walk walk;
};
@@ -1167,7 +1173,8 @@ static int hifn_setup_crypto_command(struct hifn_device *dev,
}
static int hifn_setup_cmd_desc(struct hifn_device *dev,
- struct hifn_context *ctx, void *priv, unsigned int nbytes)
+ struct hifn_context *ctx, struct hifn_request_context *rctx,
+ void *priv, unsigned int nbytes)
{
struct hifn_dma *dma = (struct hifn_dma *)dev->desc_virt;
int cmd_len, sa_idx;
@@ -1178,7 +1185,7 @@ static int hifn_setup_cmd_desc(struct hifn_device *dev,
buf_pos = buf = dma->command_bufs[dma->cmdi];
mask = 0;
- switch (ctx->op) {
+ switch (rctx->op) {
case ACRYPTO_OP_DECRYPT:
mask = HIFN_BASE_CMD_CRYPT | HIFN_BASE_CMD_DECODE;
break;
@@ -1195,15 +1202,15 @@ static int hifn_setup_cmd_desc(struct hifn_device *dev,
buf_pos += hifn_setup_base_command(dev, buf_pos, nbytes,
nbytes, mask, dev->snum);
- if (ctx->op == ACRYPTO_OP_ENCRYPT || ctx->op == ACRYPTO_OP_DECRYPT) {
+ if (rctx->op == ACRYPTO_OP_ENCRYPT || rctx->op == ACRYPTO_OP_DECRYPT) {
u16 md = 0;
if (ctx->keysize)
md |= HIFN_CRYPT_CMD_NEW_KEY;
- if (ctx->iv && ctx->mode != ACRYPTO_MODE_ECB)
+ if (rctx->iv && rctx->mode != ACRYPTO_MODE_ECB)
md |= HIFN_CRYPT_CMD_NEW_IV;
- switch (ctx->mode) {
+ switch (rctx->mode) {
case ACRYPTO_MODE_ECB:
md |= HIFN_CRYPT_CMD_MODE_ECB;
break;
@@ -1220,7 +1227,7 @@ static int hifn_setup_cmd_desc(struct hifn_device *dev,
goto err_out;
}
- switch (ctx->type) {
+ switch (rctx->type) {
case ACRYPTO_TYPE_AES_128:
if (ctx->keysize != 16)
goto err_out;
@@ -1255,7 +1262,7 @@ static int hifn_setup_cmd_desc(struct hifn_device *dev,
buf_pos += hifn_setup_crypto_command(dev, buf_pos,
nbytes, nbytes, ctx->key, ctx->keysize,
- ctx->iv, ctx->ivsize, md);
+ rctx->iv, rctx->ivsize, md);
}
dev->sa[sa_idx] = priv;
@@ -1265,7 +1272,7 @@ static int hifn_setup_cmd_desc(struct hifn_device *dev,
HIFN_D_LAST | HIFN_D_MASKDONEIRQ);
if (++dma->cmdi == HIFN_D_CMD_RSIZE) {
- dma->cmdr[dma->cmdi].l = __cpu_to_le32(HIFN_MAX_COMMAND |
+ dma->cmdr[dma->cmdi].l = __cpu_to_le32(
HIFN_D_VALID | HIFN_D_LAST |
HIFN_D_MASKDONEIRQ | HIFN_D_JUMP);
dma->cmdi = 0;
@@ -1369,7 +1376,8 @@ static void hifn_setup_dst_desc(struct hifn_device *dev, struct page *page,
}
}
-static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
+static int hifn_setup_dma(struct hifn_device *dev,
+ struct hifn_context *ctx, struct hifn_request_context *rctx,
struct scatterlist *src, struct scatterlist *dst,
unsigned int nbytes, void *priv)
{
@@ -1385,18 +1393,18 @@ static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
len = min(src->length, n);
dprintk("%s: spage: %p, soffset: %u, nbytes: %u, "
- "priv: %p, ctx: %p.\n",
- dev->name, spage, soff, nbytes, priv, ctx);
+ "priv: %p, rctx: %p.\n",
+ dev->name, spage, soff, nbytes, priv, rctx);
hifn_setup_src_desc(dev, spage, soff, len, n - len == 0);
src++;
n -= len;
}
- t = &ctx->walk.cache[0];
+ t = &rctx->walk.cache[0];
n = nbytes;
while (n) {
- if (t->length) {
+ if (t->length && rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
dpage = sg_page(t);
doff = 0;
len = t->length;
@@ -1408,8 +1416,8 @@ static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
len = min(len, n);
dprintk("%s: dpage: %p, doffset: %u, nbytes: %u, "
- "priv: %p, ctx: %p.\n",
- dev->name, dpage, doff, nbytes, priv, ctx);
+ "priv: %p, rctx: %p.\n",
+ dev->name, dpage, doff, nbytes, priv, rctx);
hifn_setup_dst_desc(dev, dpage, doff, len, n - len == 0);
dst++;
@@ -1417,7 +1425,7 @@ static int hifn_setup_dma(struct hifn_device *dev, struct hifn_context *ctx,
n -= len;
}
- hifn_setup_cmd_desc(dev, ctx, priv, nbytes);
+ hifn_setup_cmd_desc(dev, ctx, rctx, priv, nbytes);
hifn_setup_res_desc(dev);
return 0;
}
@@ -1580,16 +1588,17 @@ static int ablkcipher_walk(struct ablkcipher_request *req,
static int hifn_setup_session(struct ablkcipher_request *req)
{
struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
struct hifn_device *dev = ctx->dev;
unsigned long dlen, flags;
unsigned int nbytes = req->nbytes, idx = 0;
int err = -EINVAL, sg_num;
struct scatterlist *dst;
- if (ctx->iv && !ctx->ivsize && ctx->mode != ACRYPTO_MODE_ECB)
+ if (rctx->iv && !rctx->ivsize && rctx->mode != ACRYPTO_MODE_ECB)
goto err_out_exit;
- ctx->walk.flags = 0;
+ rctx->walk.flags = 0;
while (nbytes) {
dst = &req->dst[idx];
@@ -1597,19 +1606,19 @@ static int hifn_setup_session(struct ablkcipher_request *req)
if (!IS_ALIGNED(dst->offset, HIFN_D_DST_DALIGN) ||
!IS_ALIGNED(dlen, HIFN_D_DST_DALIGN))
- ctx->walk.flags |= ASYNC_FLAGS_MISALIGNED;
+ rctx->walk.flags |= ASYNC_FLAGS_MISALIGNED;
nbytes -= dlen;
idx++;
}
- if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
- err = ablkcipher_walk_init(&ctx->walk, idx, GFP_ATOMIC);
+ if (rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
+ err = ablkcipher_walk_init(&rctx->walk, idx, GFP_ATOMIC);
if (err < 0)
return err;
}
- sg_num = ablkcipher_walk(req, &ctx->walk);
+ sg_num = ablkcipher_walk(req, &rctx->walk);
if (sg_num < 0) {
err = sg_num;
goto err_out_exit;
@@ -1624,7 +1633,7 @@ static int hifn_setup_session(struct ablkcipher_request *req)
dev->snum++;
dev->started++;
- err = hifn_setup_dma(dev, ctx, req->src, req->dst, req->nbytes, req);
+ err = hifn_setup_dma(dev, ctx, rctx, req->src, req->dst, req->nbytes, req);
if (err)
goto err_out;
@@ -1639,9 +1648,9 @@ err_out_exit:
if (err)
dprintk("%s: iv: %p [%d], key: %p [%d], mode: %u, op: %u, "
"type: %u, err: %d.\n",
- dev->name, ctx->iv, ctx->ivsize,
+ dev->name, rctx->iv, rctx->ivsize,
ctx->key, ctx->keysize,
- ctx->mode, ctx->op, ctx->type, err);
+ rctx->mode, rctx->op, rctx->type, err);
return err;
}
@@ -1651,6 +1660,7 @@ static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
int n, err;
u8 src[16];
struct hifn_context ctx;
+ struct hifn_request_context rctx;
u8 fips_aes_ecb_from_zero[16] = {
0x66, 0xE9, 0x4B, 0xD4,
0xEF, 0x8A, 0x2C, 0x3B,
@@ -1663,16 +1673,16 @@ static int hifn_test(struct hifn_device *dev, int encdec, u8 snum)
ctx.dev = dev;
ctx.keysize = 16;
- ctx.ivsize = 0;
- ctx.iv = NULL;
- ctx.op = (encdec)?ACRYPTO_OP_ENCRYPT:ACRYPTO_OP_DECRYPT;
- ctx.mode = ACRYPTO_MODE_ECB;
- ctx.type = ACRYPTO_TYPE_AES_128;
- ctx.walk.cache[0].length = 0;
+ rctx.ivsize = 0;
+ rctx.iv = NULL;
+ rctx.op = (encdec)?ACRYPTO_OP_ENCRYPT:ACRYPTO_OP_DECRYPT;
+ rctx.mode = ACRYPTO_MODE_ECB;
+ rctx.type = ACRYPTO_TYPE_AES_128;
+ rctx.walk.cache[0].length = 0;
sg_init_one(&sg, &src, sizeof(src));
- err = hifn_setup_dma(dev, &ctx, &sg, &sg, sizeof(src), NULL);
+ err = hifn_setup_dma(dev, &ctx, &rctx, &sg, &sg, sizeof(src), NULL);
if (err)
goto err_out;
@@ -1758,9 +1768,10 @@ static int ablkcipher_get(void *saddr, unsigned int *srestp, unsigned int offset
static void hifn_process_ready(struct ablkcipher_request *req, int error)
{
struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
struct hifn_device *dev;
- dprintk("%s: req: %p, ctx: %p.\n", __func__, req, ctx);
+ dprintk("%s: req: %p, ctx: %p rctx: %p.\n", __func__, req, ctx, rctx);
dev = ctx->dev;
dprintk("%s: req: %p, started: %d.\n", __func__, req, dev->started);
@@ -1768,14 +1779,14 @@ static void hifn_process_ready(struct ablkcipher_request *req, int error)
if (--dev->started < 0)
BUG();
- if (ctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
+ if (rctx->walk.flags & ASYNC_FLAGS_MISALIGNED) {
unsigned int nbytes = req->nbytes;
int idx = 0, err;
struct scatterlist *dst, *t;
void *saddr;
while (nbytes) {
- t = &ctx->walk.cache[idx];
+ t = &rctx->walk.cache[idx];
dst = &req->dst[idx];
dprintk("\n%s: sg_page(t): %p, t->length: %u, "
@@ -1803,7 +1814,7 @@ static void hifn_process_ready(struct ablkcipher_request *req, int error)
kunmap_atomic(saddr, KM_IRQ1);
}
- ablkcipher_walk_exit(&ctx->walk);
+ ablkcipher_walk_exit(&rctx->walk);
}
req->base.complete(&req->base, error);
@@ -2109,6 +2120,7 @@ static int hifn_setup_crypto_req(struct ablkcipher_request *req, u8 op,
u8 type, u8 mode)
{
struct hifn_context *ctx = crypto_tfm_ctx(req->base.tfm);
+ struct hifn_request_context *rctx = ablkcipher_request_ctx(req);
unsigned ivsize;
ivsize = crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(req));
@@ -2129,11 +2141,11 @@ static int hifn_setup_crypto_req(struct ablkcipher_request *req, u8 op,
type = ACRYPTO_TYPE_AES_256;
}
- ctx->op = op;
- ctx->mode = mode;
- ctx->type = type;
- ctx->iv = req->info;
- ctx->ivsize = ivsize;
+ rctx->op = op;
+ rctx->mode = mode;
+ rctx->type = type;
+ rctx->iv = req->info;
+ rctx->ivsize = ivsize;
/*
* HEAVY TODO: needs to kick Herbert XU to write documentation.
@@ -2484,7 +2496,7 @@ static int hifn_cra_init(struct crypto_tfm *tfm)
struct hifn_context *ctx = crypto_tfm_ctx(tfm);
ctx->dev = ha->dev;
-
+ tfm->crt_ablkcipher.reqsize = sizeof(struct hifn_request_context);
return 0;
}