diff options
| author | Kees Cook <keescook@chromium.org> | 2018-09-18 19:10:58 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-09-28 12:46:09 +0800 |
| commit | e87f203ce6202b0380eae31ca524a22f714b740e (patch) | |
| tree | 8dd78f2711de8ba87011b5afd5621debc995f1dd | |
| parent | f805f59d1ea2f599516e183d753e4e0acc2ed721 (diff) | |
crypto: omap-aes - 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
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/omap-aes.c | 17 | ||||
| -rw-r--r-- | drivers/crypto/omap-aes.h | 2 |
2 files changed, 9 insertions, 10 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 9019f6b67986..a553ffddb11b 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -522,9 +522,9 @@ static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode) !!(mode & FLAGS_CBC)); if (req->nbytes < aes_fallback_sz) { - 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, @@ -564,11 +564,11 @@ static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, memcpy(ctx->key, key, keylen); ctx->keylen = keylen; - crypto_skcipher_clear_flags(ctx->fallback, CRYPTO_TFM_REQ_MASK); - crypto_skcipher_set_flags(ctx->fallback, tfm->base.crt_flags & + crypto_sync_skcipher_clear_flags(ctx->fallback, CRYPTO_TFM_REQ_MASK); + crypto_sync_skcipher_set_flags(ctx->fallback, tfm->base.crt_flags & CRYPTO_TFM_REQ_MASK); - ret = crypto_skcipher_setkey(ctx->fallback, key, keylen); + ret = crypto_sync_skcipher_setkey(ctx->fallback, key, keylen); if (!ret) return 0; @@ -613,11 +613,10 @@ static int omap_aes_crypt_req(struct crypto_engine *engine, static int omap_aes_cra_init(struct crypto_tfm *tfm) { const char *name = crypto_tfm_alg_name(tfm); - const u32 flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK; struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); - struct crypto_skcipher *blk; + struct crypto_sync_skcipher *blk; - blk = crypto_alloc_skcipher(name, 0, flags); + blk = crypto_alloc_sync_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK); if (IS_ERR(blk)) return PTR_ERR(blk); @@ -667,7 +666,7 @@ static void omap_aes_cra_exit(struct crypto_tfm *tfm) struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); if (ctx->fallback) - crypto_free_skcipher(ctx->fallback); + crypto_free_sync_skcipher(ctx->fallback); ctx->fallback = NULL; } diff --git a/drivers/crypto/omap-aes.h b/drivers/crypto/omap-aes.h index fc3b46a85809..7e02920ef6f8 100644 --- a/drivers/crypto/omap-aes.h +++ b/drivers/crypto/omap-aes.h @@ -101,7 +101,7 @@ struct omap_aes_ctx { int keylen; u32 key[AES_KEYSIZE_256 / sizeof(u32)]; u8 nonce[4]; - struct crypto_skcipher *fallback; + struct crypto_sync_skcipher *fallback; struct crypto_skcipher *ctr; }; |