crypto: testmgr - dynamically allocate testvec_config

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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 32 insertions, 11 deletions

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 5d163dd2ffac..ace4c260ea5d 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1570,7 +1570,7 @@ 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;
 
@@ -1600,6 +1600,12 @@ 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)) {
@@ -1634,9 +1640,9 @@ 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;
@@ -1644,6 +1650,7 @@ static int test_hash_vs_generic_impl(const char *driver,
         }
         err = 0;
 out:
+        kfree(cfg);
         kfree(vec.key);
         kfree(vec.plaintext);
         kfree(vec.digest);
@@ -2140,7 +2147,7 @@ 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;
 
@@ -2170,6 +2177,12 @@ 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;
@@ -2224,13 +2237,13 @@ 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;
@@ -2238,6 +2251,7 @@ static int test_aead_vs_generic_impl(const char *driver,
         }
         err = 0;
 out:
+        kfree(cfg);
         kfree(vec.key);
         kfree(vec.iv);
         kfree(vec.assoc);
@@ -2687,7 +2701,7 @@ 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;
 
@@ -2721,6 +2735,12 @@ 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;
@@ -2768,20 +2788,21 @@ 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);