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crypto: testmgr - avoid DMA mapping from text, rodata, stack

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With DMA_API_DEBUG set, following warnings are emitted
(tested on CAAM accelerator):
DMA-API: device driver maps memory from kernel text or rodata
DMA-API: device driver maps memory from stack
and the culprits are:
-key in __test_aead and __test_hash
-result in __test_hash

MAX_KEYLEN is changed to accommodate maximum key length from
existing test vectors in crypto/testmgr.h (131 bytes) and rounded.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geanta 2014-07-23 11:59:38 +03:00 committed by Herbert Xu
parent 126ae9adc1
commit 29b77e5dd8
2 changed files with 50 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

57
crypto/testmgr.c
View File

@ -198,13 +198,20 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
const char *algo = crypto_tfm_alg_driver_name(crypto_ahash_tfm(tfm));
unsigned int i, j, k, temp;
struct scatterlist sg[8];
char result[64];
char *result;
char *key;
struct ahash_request *req;
struct tcrypt_result tresult;
void *hash_buff;
char *xbuf[XBUFSIZE];
int ret = -ENOMEM;
result = kmalloc(MAX_DIGEST_SIZE, GFP_KERNEL);
if (!result)
return ret;
key = kmalloc(MAX_KEYLEN, GFP_KERNEL);
if (!key)
goto out_nobuf;
if (testmgr_alloc_buf(xbuf))
goto out_nobuf;
@ -229,7 +236,7 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
goto out;
j++;
memset(result, 0, 64);
memset(result, 0, MAX_DIGEST_SIZE);
hash_buff = xbuf[0];
hash_buff += align_offset;
@ -239,8 +246,14 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
if (template[i].ksize) {
crypto_ahash_clear_flags(tfm, ~0);
ret = crypto_ahash_setkey(tfm, template[i].key,
template[i].ksize);
if (template[i].ksize > MAX_KEYLEN) {
pr_err("alg: hash: setkey failed on test %d for %s: key size %d > %d\n",
j, algo, template[i].ksize, MAX_KEYLEN);
ret = -EINVAL;
goto out;
}
memcpy(key, template[i].key, template[i].ksize);
ret = crypto_ahash_setkey(tfm, key, template[i].ksize);
if (ret) {
printk(KERN_ERR "alg: hash: setkey failed on "
"test %d for %s: ret=%d\n", j, algo,
@ -300,7 +313,7 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
if (template[i].np) {
j++;
memset(result, 0, 64);
memset(result, 0, MAX_DIGEST_SIZE);
temp = 0;
sg_init_table(sg, template[i].np);
@ -319,8 +332,16 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
}
if (template[i].ksize) {
if (template[i].ksize > MAX_KEYLEN) {
pr_err("alg: hash: setkey failed on test %d for %s: key size %d > %d\n",
j, algo, template[i].ksize,
MAX_KEYLEN);
ret = -EINVAL;
goto out;
}
crypto_ahash_clear_flags(tfm, ~0);
ret = crypto_ahash_setkey(tfm, template[i].key,
memcpy(key, template[i].key, template[i].ksize);
ret = crypto_ahash_setkey(tfm, key,
template[i].ksize);
if (ret) {
@ -372,6 +393,8 @@ out:
out_noreq:
testmgr_free_buf(xbuf);
out_nobuf:
kfree(key);
kfree(result);
return ret;
}
@ -429,6 +452,9 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
iv = kzalloc(MAX_IVLEN, GFP_KERNEL);
if (!iv)
return ret;
key = kmalloc(MAX_KEYLEN, GFP_KERNEL);
if (!key)
goto out_noxbuf;
if (testmgr_alloc_buf(xbuf))
goto out_noxbuf;
if (testmgr_alloc_buf(axbuf))
@ -493,7 +519,14 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
crypto_aead_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
key = template[i].key;
if (template[i].klen > MAX_KEYLEN) {
pr_err("alg: aead%s: setkey failed on test %d for %s: key size %d > %d\n",
d, j, algo, template[i].klen,
MAX_KEYLEN);
ret = -EINVAL;
goto out;
}
memcpy(key, template[i].key, template[i].klen);
ret = crypto_aead_setkey(tfm, key,
template[i].klen);
@ -594,7 +627,14 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
if (template[i].wk)
crypto_aead_set_flags(
tfm, CRYPTO_TFM_REQ_WEAK_KEY);
key = template[i].key;
if (template[i].klen > MAX_KEYLEN) {
pr_err("alg: aead%s: setkey failed on test %d for %s: key size %d > %d\n",
d, j, algo, template[i].klen,
MAX_KEYLEN);
ret = -EINVAL;
goto out;
}
memcpy(key, template[i].key, template[i].klen);
ret = crypto_aead_setkey(tfm, key, template[i].klen);
if (!ret == template[i].fail) {
@ -776,6 +816,7 @@ out_nooutbuf:
out_noaxbuf:
testmgr_free_buf(xbuf);
out_noxbuf:
kfree(key);
kfree(iv);
return ret;
}

2
crypto/testmgr.h
View File

@ -32,7 +32,7 @@
#define MAX_DIGEST_SIZE 64
#define MAX_TAP 8
#define MAX_KEYLEN 56
#define MAX_KEYLEN 160
#define MAX_IVLEN 32
struct hash_testvec {