diff mbox series

[v2,1/2] crypto: testmgr - dynamically allocate testvec_config

Message ID 20190618092215.2790800-1-arnd@arndb.de
State New
Headers show
Series [v2,1/2] crypto: testmgr - dynamically allocate testvec_config | expand

Commit Message

Arnd Bergmann June 18, 2019, 9:21 a.m. UTC 
On arm32, we get warnings about high stack usage in some of the functions:

crypto/testmgr.c:2269:12: error: stack frame size of 1032 bytes in function 'alg_test_aead' [-Werror,-Wframe-larger-than=]
static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,
           ^
crypto/testmgr.c:1693:12: error: stack frame size of 1312 bytes in function '__alg_test_hash' [-Werror,-Wframe-larger-than=]
static int __alg_test_hash(const struct hash_testvec *vecs,
           ^

On of the larger objects on the stack here is struct testvec_config, so
change that to dynamic allocation.

Fixes: 40153b10d91c ("crypto: testmgr - fuzz AEADs against their generic implementation")
Fixes: d435e10e67be ("crypto: testmgr - fuzz skciphers against their generic implementation")
Fixes: 9a8a6b3f0950 ("crypto: testmgr - fuzz hashes against their generic implementation")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 crypto/testmgr.c | 43 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 11 deletions(-)

-- 
2.20.0

Comments

Eric Biggers June 18, 2019, 6:06 p.m. UTC | #1 
On Tue, Jun 18, 2019 at 11:21:52AM +0200, Arnd Bergmann wrote:
> On arm32, we get warnings about high stack usage in some of the functions:

> 

> crypto/testmgr.c:2269:12: error: stack frame size of 1032 bytes in function 'alg_test_aead' [-Werror,-Wframe-larger-than=]

> static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,

>            ^

> crypto/testmgr.c:1693:12: error: stack frame size of 1312 bytes in function '__alg_test_hash' [-Werror,-Wframe-larger-than=]

> static int __alg_test_hash(const struct hash_testvec *vecs,

>            ^

> 

> On of the larger objects on the stack here is struct testvec_config, so

> change that to dynamic allocation.

> 

> Fixes: 40153b10d91c ("crypto: testmgr - fuzz AEADs against their generic implementation")

> Fixes: d435e10e67be ("crypto: testmgr - fuzz skciphers against their generic implementation")

> Fixes: 9a8a6b3f0950 ("crypto: testmgr - fuzz hashes against their generic implementation")

> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

> ---


Reviewed-by: Eric Biggers <ebiggers@kernel.org>


- Eric
Herbert Xu June 28, 2019, 4:18 a.m. UTC | #2 
On Tue, Jun 18, 2019 at 11:21:52AM +0200, Arnd Bergmann wrote:
> On arm32, we get warnings about high stack usage in some of the functions:

> 

> crypto/testmgr.c:2269:12: error: stack frame size of 1032 bytes in function 'alg_test_aead' [-Werror,-Wframe-larger-than=]

> static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,

>            ^

> crypto/testmgr.c:1693:12: error: stack frame size of 1312 bytes in function '__alg_test_hash' [-Werror,-Wframe-larger-than=]

> static int __alg_test_hash(const struct hash_testvec *vecs,

>            ^

> 

> On of the larger objects on the stack here is struct testvec_config, so

> change that to dynamic allocation.

> 

> Fixes: 40153b10d91c ("crypto: testmgr - fuzz AEADs against their generic implementation")

> Fixes: d435e10e67be ("crypto: testmgr - fuzz skciphers against their generic implementation")

> Fixes: 9a8a6b3f0950 ("crypto: testmgr - fuzz hashes against their generic implementation")

> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

> ---

>  crypto/testmgr.c | 43 ++++++++++++++++++++++++++++++++-----------

>  1 file changed, 32 insertions(+), 11 deletions(-)


All applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
diff mbox series

Patch

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 6c28055d41ca..0e07f61f1a31 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1565,7 +1565,7 @@  static int test_hash_vs_generic_impl(const char *driver,
 	unsigned int i;
 	struct hash_testvec vec = { 0 };
 	char vec_name[64];
-	struct testvec_config cfg;
+	struct testvec_config *cfg;
 	char cfgname[TESTVEC_CONFIG_NAMELEN];
 	int err;
 
@@ -1595,6 +1595,12 @@  static int test_hash_vs_generic_impl(const char *driver,
 		return err;
 	}
 
+	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+	if (!cfg) {
+		err = -ENOMEM;
+		goto out;
+	}
+
 	/* Check the algorithm properties for consistency. */
 
 	if (digestsize != crypto_shash_digestsize(generic_tfm)) {
@@ -1629,9 +1635,9 @@  static int test_hash_vs_generic_impl(const char *driver,
 		generate_random_hash_testvec(generic_tfm, &vec,
 					     maxkeysize, maxdatasize,
 					     vec_name, sizeof(vec_name));
-		generate_random_testvec_config(&cfg, cfgname, sizeof(cfgname));
+		generate_random_testvec_config(cfg, cfgname, sizeof(cfgname));
 
-		err = test_hash_vec_cfg(driver, &vec, vec_name, &cfg,
+		err = test_hash_vec_cfg(driver, &vec, vec_name, cfg,
 					req, desc, tsgl, hashstate);
 		if (err)
 			goto out;
@@ -1639,6 +1645,7 @@  static int test_hash_vs_generic_impl(const char *driver,
 	}
 	err = 0;
 out:
+	kfree(cfg);
 	kfree(vec.key);
 	kfree(vec.plaintext);
 	kfree(vec.digest);
@@ -2135,7 +2142,7 @@  static int test_aead_vs_generic_impl(const char *driver,
 	unsigned int i;
 	struct aead_testvec vec = { 0 };
 	char vec_name[64];
-	struct testvec_config cfg;
+	struct testvec_config *cfg;
 	char cfgname[TESTVEC_CONFIG_NAMELEN];
 	int err;
 
@@ -2165,6 +2172,12 @@  static int test_aead_vs_generic_impl(const char *driver,
 		return err;
 	}
 
+	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+	if (!cfg) {
+		err = -ENOMEM;
+		goto out;
+	}
+
 	generic_req = aead_request_alloc(generic_tfm, GFP_KERNEL);
 	if (!generic_req) {
 		err = -ENOMEM;
@@ -2219,13 +2232,13 @@  static int test_aead_vs_generic_impl(const char *driver,
 		generate_random_aead_testvec(generic_req, &vec,
 					     maxkeysize, maxdatasize,
 					     vec_name, sizeof(vec_name));
-		generate_random_testvec_config(&cfg, cfgname, sizeof(cfgname));
+		generate_random_testvec_config(cfg, cfgname, sizeof(cfgname));
 
-		err = test_aead_vec_cfg(driver, ENCRYPT, &vec, vec_name, &cfg,
+		err = test_aead_vec_cfg(driver, ENCRYPT, &vec, vec_name, cfg,
 					req, tsgls);
 		if (err)
 			goto out;
-		err = test_aead_vec_cfg(driver, DECRYPT, &vec, vec_name, &cfg,
+		err = test_aead_vec_cfg(driver, DECRYPT, &vec, vec_name, cfg,
 					req, tsgls);
 		if (err)
 			goto out;
@@ -2233,6 +2246,7 @@  static int test_aead_vs_generic_impl(const char *driver,
 	}
 	err = 0;
 out:
+	kfree(cfg);
 	kfree(vec.key);
 	kfree(vec.iv);
 	kfree(vec.assoc);
@@ -2682,7 +2696,7 @@  static int test_skcipher_vs_generic_impl(const char *driver,
 	unsigned int i;
 	struct cipher_testvec vec = { 0 };
 	char vec_name[64];
-	struct testvec_config cfg;
+	struct testvec_config *cfg;
 	char cfgname[TESTVEC_CONFIG_NAMELEN];
 	int err;
 
@@ -2716,6 +2730,12 @@  static int test_skcipher_vs_generic_impl(const char *driver,
 		return err;
 	}
 
+	cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
+	if (!cfg) {
+		err = -ENOMEM;
+		goto out;
+	}
+
 	generic_req = skcipher_request_alloc(generic_tfm, GFP_KERNEL);
 	if (!generic_req) {
 		err = -ENOMEM;
@@ -2763,20 +2783,21 @@  static int test_skcipher_vs_generic_impl(const char *driver,
 	for (i = 0; i < fuzz_iterations * 8; i++) {
 		generate_random_cipher_testvec(generic_req, &vec, maxdatasize,
 					       vec_name, sizeof(vec_name));
-		generate_random_testvec_config(&cfg, cfgname, sizeof(cfgname));
+		generate_random_testvec_config(cfg, cfgname, sizeof(cfgname));
 
 		err = test_skcipher_vec_cfg(driver, ENCRYPT, &vec, vec_name,
-					    &cfg, req, tsgls);
+					    cfg, req, tsgls);
 		if (err)
 			goto out;
 		err = test_skcipher_vec_cfg(driver, DECRYPT, &vec, vec_name,
-					    &cfg, req, tsgls);
+					    cfg, req, tsgls);
 		if (err)
 			goto out;
 		cond_resched();
 	}
 	err = 0;
 out:
+	kfree(cfg);
 	kfree(vec.key);
 	kfree(vec.iv);
 	kfree(vec.ptext);