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
Signed-off-by: Horia Geanta <horia.geanta@xxxxxxxxxxxxx>
---
There was a previous cryptodev-2.6 commit with similar updates:
9bac019dad8098a77cce555d929f678e22111783
("crypto: testmgr - Fix DMA-API warning")
This patch addresses only warnings seen in CAAM module.
In other words, warnings might still be encountered in tcrypt, depending on
crypto accelerator being used.
crypto/testmgr.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++--------
crypto/testmgr.h | 2 +-
2 files changed, 50 insertions(+), 9 deletions(-)
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 0f90612a00b9..2d3aa96babff 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -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 = NULL;
+ char *key = NULL;
struct ahash_request *req;
struct tcrypt_result tresult;
void *hash_buff;
char *xbuf[XBUFSIZE];
int ret = -ENOMEM;
+ result = kmalloc(64, 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;
@@ -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,
@@ -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;
}
@@ -410,7 +433,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
unsigned int i, j, k, n, temp;
int ret = -ENOMEM;
char *q;
- char *key;
+ char *key = NULL;
struct aead_request *req;
struct scatterlist *sg;
struct scatterlist *asg;
@@ -421,7 +444,7 @@ static int __test_aead(struct crypto_aead *tfm, int enc,
void *input;
void *output;
void *assoc;
- char *iv;
+ char *iv = NULL;
char *xbuf[XBUFSIZE];
char *xoutbuf[XBUFSIZE];
char *axbuf[XBUFSIZE];
@@ -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;
}
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 4bb607189b8d..46df9e88bbf3 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -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 {
--
1.8.3.1
--
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