diff options
| author | Kees Cook <keescook@chromium.org> | 2018-09-19 05:10:54 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-09-28 07:46:08 +0300 |
| commit | d1e4ba83b0286b3a0888b2fd361082ecd86fd07a (patch) | |
| tree | 14b1182515070c33e6ee822ab3d8330d498e3b86 | |
| parent | ba70152b60e81270338d86ce7c7b71e756530430 (diff) | |
| download | linux-d1e4ba83b0286b3a0888b2fd361082ecd86fd07a.tar.xz | |
crypto: qce - Remove VLA usage of skcipher
In the quest to remove all stack VLA usage from the kernel[1], this
replaces struct crypto_skcipher and SKCIPHER_REQUEST_ON_STACK() usage
with struct crypto_sync_skcipher and SYNC_SKCIPHER_REQUEST_ON_STACK(),
which uses a fixed stack size.
[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Cc: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/qce/ablkcipher.c | 13 | ||||
| -rw-r--r-- | drivers/crypto/qce/cipher.h | 2 |
2 files changed, 7 insertions, 8 deletions
diff --git a/drivers/crypto/qce/ablkcipher.c b/drivers/crypto/qce/ablkcipher.c index ea4d96bf47e8..585e1cab9ae3 100644 --- a/drivers/crypto/qce/ablkcipher.c +++ b/drivers/crypto/qce/ablkcipher.c @@ -189,7 +189,7 @@ static int qce_ablkcipher_setkey(struct crypto_ablkcipher *ablk, const u8 *key, memcpy(ctx->enc_key, key, keylen); return 0; fallback: - ret = crypto_skcipher_setkey(ctx->fallback, key, keylen); + ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen); if (!ret) ctx->enc_keylen = keylen; return ret; @@ -212,9 +212,9 @@ static int qce_ablkcipher_crypt(struct ablkcipher_request *req, int encrypt) if (IS_AES(rctx->flags) && ctx->enc_keylen != AES_KEYSIZE_128 && ctx->enc_keylen != AES_KEYSIZE_256) { - SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback); + SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->fallback); - skcipher_request_set_tfm(subreq, ctx->fallback); + skcipher_request_set_sync_tfm(subreq, ctx->fallback); skcipher_request_set_callback(subreq, req->base.flags, NULL, NULL); skcipher_request_set_crypt(subreq, req->src, req->dst, @@ -245,9 +245,8 @@ static int qce_ablkcipher_init(struct crypto_tfm *tfm) memset(ctx, 0, sizeof(*ctx)); tfm->crt_ablkcipher.reqsize = sizeof(struct qce_cipher_reqctx); - ctx->fallback = crypto_alloc_skcipher(crypto_tfm_alg_name(tfm), 0, - CRYPTO_ALG_ASYNC | - CRYPTO_ALG_NEED_FALLBACK); + ctx->fallback = crypto_alloc_sync_skcipher(crypto_tfm_alg_name(tfm), + 0, CRYPTO_ALG_NEED_FALLBACK); return PTR_ERR_OR_ZERO(ctx->fallback); } @@ -255,7 +254,7 @@ static void qce_ablkcipher_exit(struct crypto_tfm *tfm) { struct qce_cipher_ctx *ctx = crypto_tfm_ctx(tfm); - crypto_free_skcipher(ctx->fallback); + crypto_free_sync_skcipher(ctx->fallback); } struct qce_ablkcipher_def { diff --git a/drivers/crypto/qce/cipher.h b/drivers/crypto/qce/cipher.h index 2b0278bb6e92..ee055bfe98a0 100644 --- a/drivers/crypto/qce/cipher.h +++ b/drivers/crypto/qce/cipher.h @@ -22,7 +22,7 @@ struct qce_cipher_ctx { u8 enc_key[QCE_MAX_KEY_SIZE]; unsigned int enc_keylen; - struct crypto_skcipher *fallback; + struct crypto_sync_skcipher *fallback; }; /** |