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crypto: ccp - Limit the amount of information exported

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Since the exported information can be exposed to user-space, instead of
exporting the entire request context only export the minimum information
needed.

Cc: <stable@vger.kernel.org> # 3.14.x-
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tom Lendacky
2016-01-29 12:45:14 -06:00
committed by Herbert Xu
부모 0529900a01
커밋 d1662165ae
3개의 변경된 파일과 48개의 추가작업 그리고 10개의 파일을 삭제
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20
drivers/crypto/ccp/ccp-crypto-sha.c
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@@ -210,9 +210,14 @@ static int ccp_sha_digest(struct ahash_request *req)
static int ccp_sha_export(struct ahash_request *req, void *out)
{
struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
struct ccp_sha_req_ctx *state = out;
struct ccp_sha_exp_ctx *state = out;
*state = *rctx;
state->type = rctx->type;
state->msg_bits = rctx->msg_bits;
state->first = rctx->first;
memcpy(state->ctx, rctx->ctx, sizeof(state->ctx));
state->buf_count = rctx->buf_count;
memcpy(state->buf, rctx->buf, sizeof(state->buf));
return 0;
}
@@ -220,9 +225,14 @@ static int ccp_sha_export(struct ahash_request *req, void *out)
static int ccp_sha_import(struct ahash_request *req, const void *in)
{
struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
const struct ccp_sha_req_ctx *state = in;
const struct ccp_sha_exp_ctx *state = in;
*rctx = *state;
rctx->type = state->type;
rctx->msg_bits = state->msg_bits;
rctx->first = state->first;
memcpy(rctx->ctx, state->ctx, sizeof(rctx->ctx));
rctx->buf_count = state->buf_count;
memcpy(rctx->buf, state->buf, sizeof(rctx->buf));
return 0;
}
@@ -428,7 +438,7 @@ static int ccp_register_sha_alg(struct list_head *head,
halg = &alg->halg;
halg->digestsize = def->digest_size;
halg->statesize = sizeof(struct ccp_sha_req_ctx);
halg->statesize = sizeof(struct ccp_sha_exp_ctx);
base = &halg->base;
snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);