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authorKees Cook <keescook@chromium.org>2018-09-18 19:10:50 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2018-09-28 12:46:08 +0800
commit5c525640ef455b23ce911ac71eb22c7256031b9a (patch)
tree9699c5545c02d69dc1d9f5ba0238223d6088241e /drivers/crypto/vmx
parent7f28615df88a6311e233c2da9279e013ea1ee76b (diff)
crypto: vmx - 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: "Leonidas S. Barbosa" <leosilva@linux.vnet.ibm.com> Cc: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/vmx')
-rw-r--r--drivers/crypto/vmx/aes_cbc.c22
-rw-r--r--drivers/crypto/vmx/aes_ctr.c18
-rw-r--r--drivers/crypto/vmx/aes_xts.c18
3 files changed, 29 insertions, 29 deletions
diff --git a/drivers/crypto/vmx/aes_cbc.c b/drivers/crypto/vmx/aes_cbc.c
index b71895871be3..c5c5ff82b52e 100644
--- a/drivers/crypto/vmx/aes_cbc.c
+++ b/drivers/crypto/vmx/aes_cbc.c
@@ -32,7 +32,7 @@
#include "aesp8-ppc.h"
struct p8_aes_cbc_ctx {
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct aes_key enc_key;
struct aes_key dec_key;
};
@@ -40,11 +40,11 @@ struct p8_aes_cbc_ctx {
static int p8_aes_cbc_init(struct crypto_tfm *tfm)
{
const char *alg = crypto_tfm_alg_name(tfm);
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
- fallback = crypto_alloc_skcipher(alg, 0,
- CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+ fallback = crypto_alloc_sync_skcipher(alg, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
@@ -53,7 +53,7 @@ static int p8_aes_cbc_init(struct crypto_tfm *tfm)
return PTR_ERR(fallback);
}
- crypto_skcipher_set_flags(
+ crypto_sync_skcipher_set_flags(
fallback,
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;
@@ -66,7 +66,7 @@ static void p8_aes_cbc_exit(struct crypto_tfm *tfm)
struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
if (ctx->fallback) {
- crypto_free_skcipher(ctx->fallback);
+ crypto_free_sync_skcipher(ctx->fallback);
ctx->fallback = NULL;
}
}
@@ -86,7 +86,7 @@ static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
pagefault_enable();
preempt_enable();
- ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
+ ret += crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
return ret;
}
@@ -100,8 +100,8 @@ static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
if (in_interrupt()) {
- SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
- skcipher_request_set_tfm(req, ctx->fallback);
+ SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+ skcipher_request_set_sync_tfm(req, ctx->fallback);
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
ret = crypto_skcipher_encrypt(req);
@@ -139,8 +139,8 @@ static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
if (in_interrupt()) {
- SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
- skcipher_request_set_tfm(req, ctx->fallback);
+ SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+ skcipher_request_set_sync_tfm(req, ctx->fallback);
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
ret = crypto_skcipher_decrypt(req);
diff --git a/drivers/crypto/vmx/aes_ctr.c b/drivers/crypto/vmx/aes_ctr.c
index cd777c75291d..8a2fe092cb8e 100644
--- a/drivers/crypto/vmx/aes_ctr.c
+++ b/drivers/crypto/vmx/aes_ctr.c
@@ -32,18 +32,18 @@
#include "aesp8-ppc.h"
struct p8_aes_ctr_ctx {
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct aes_key enc_key;
};
static int p8_aes_ctr_init(struct crypto_tfm *tfm)
{
const char *alg = crypto_tfm_alg_name(tfm);
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
- fallback = crypto_alloc_skcipher(alg, 0,
- CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+ fallback = crypto_alloc_sync_skcipher(alg, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
"Failed to allocate transformation for '%s': %ld\n",
@@ -51,7 +51,7 @@ static int p8_aes_ctr_init(struct crypto_tfm *tfm)
return PTR_ERR(fallback);
}
- crypto_skcipher_set_flags(
+ crypto_sync_skcipher_set_flags(
fallback,
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;
@@ -64,7 +64,7 @@ static void p8_aes_ctr_exit(struct crypto_tfm *tfm)
struct p8_aes_ctr_ctx *ctx = crypto_tfm_ctx(tfm);
if (ctx->fallback) {
- crypto_free_skcipher(ctx->fallback);
+ crypto_free_sync_skcipher(ctx->fallback);
ctx->fallback = NULL;
}
}
@@ -83,7 +83,7 @@ static int p8_aes_ctr_setkey(struct crypto_tfm *tfm, const u8 *key,
pagefault_enable();
preempt_enable();
- ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
+ ret += crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
return ret;
}
@@ -119,8 +119,8 @@ static int p8_aes_ctr_crypt(struct blkcipher_desc *desc,
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
if (in_interrupt()) {
- SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
- skcipher_request_set_tfm(req, ctx->fallback);
+ SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+ skcipher_request_set_sync_tfm(req, ctx->fallback);
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
ret = crypto_skcipher_encrypt(req);
diff --git a/drivers/crypto/vmx/aes_xts.c b/drivers/crypto/vmx/aes_xts.c
index e9954a7d4694..ecd64e5cc5bb 100644
--- a/drivers/crypto/vmx/aes_xts.c
+++ b/drivers/crypto/vmx/aes_xts.c
@@ -33,7 +33,7 @@
#include "aesp8-ppc.h"
struct p8_aes_xts_ctx {
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct aes_key enc_key;
struct aes_key dec_key;
struct aes_key tweak_key;
@@ -42,11 +42,11 @@ struct p8_aes_xts_ctx {
static int p8_aes_xts_init(struct crypto_tfm *tfm)
{
const char *alg = crypto_tfm_alg_name(tfm);
- struct crypto_skcipher *fallback;
+ struct crypto_sync_skcipher *fallback;
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
- fallback = crypto_alloc_skcipher(alg, 0,
- CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
+ fallback = crypto_alloc_sync_skcipher(alg, 0,
+ CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(fallback)) {
printk(KERN_ERR
"Failed to allocate transformation for '%s': %ld\n",
@@ -54,7 +54,7 @@ static int p8_aes_xts_init(struct crypto_tfm *tfm)
return PTR_ERR(fallback);
}
- crypto_skcipher_set_flags(
+ crypto_sync_skcipher_set_flags(
fallback,
crypto_skcipher_get_flags((struct crypto_skcipher *)tfm));
ctx->fallback = fallback;
@@ -67,7 +67,7 @@ static void p8_aes_xts_exit(struct crypto_tfm *tfm)
struct p8_aes_xts_ctx *ctx = crypto_tfm_ctx(tfm);
if (ctx->fallback) {
- crypto_free_skcipher(ctx->fallback);
+ crypto_free_sync_skcipher(ctx->fallback);
ctx->fallback = NULL;
}
}
@@ -92,7 +92,7 @@ static int p8_aes_xts_setkey(struct crypto_tfm *tfm, const u8 *key,
pagefault_enable();
preempt_enable();
- ret += crypto_skcipher_setkey(ctx->fallback, key, keylen);
+ ret += crypto_sync_skcipher_setkey(ctx->fallback, key, keylen);
return ret;
}
@@ -109,8 +109,8 @@ static int p8_aes_xts_crypt(struct blkcipher_desc *desc,
crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
if (in_interrupt()) {
- SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
- skcipher_request_set_tfm(req, ctx->fallback);
+ SYNC_SKCIPHER_REQUEST_ON_STACK(req, ctx->fallback);
+ skcipher_request_set_sync_tfm(req, ctx->fallback);
skcipher_request_set_callback(req, desc->flags, NULL, NULL);
skcipher_request_set_crypt(req, src, dst, nbytes, desc->info);
ret = enc? crypto_skcipher_encrypt(req) : crypto_skcipher_decrypt(req);