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authorGilad Ben-Yossef <gilad@benyossef.com>2022-04-06 11:11:38 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2022-04-15 16:34:25 +0800
commit476c9ab75976c3aea1f7f05e1ebbd1219a0f11bb (patch)
tree7d58004ed88424db214da90a2305cc1bebb2bd04
parentc79c09ad31e2c0a5ba0166b284f433b95d9c4c18 (diff)
crypto: ccree - rearrange init calls to avoid race
Rearrange init calls to avoid the rare race condition of the cipher algs being registered and used while we still init the hash code which uses the HW without proper lock. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Reported-by: Dung Nguyen <dung.nguyen.zy@renesas.com> Tested-by: Jing Dan <jing.dan.nx@renesas.com> Tested-by: Dung Nguyen <dung.nguyen.zy@renesas.com> Fixes: 63893811b0fc("crypto: ccree - add ahash support") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--drivers/crypto/ccree/cc_driver.c24
1 files changed, 13 insertions, 11 deletions
diff --git a/drivers/crypto/ccree/cc_driver.c b/drivers/crypto/ccree/cc_driver.c
index 790fa9058a36..7d1bee86d581 100644
--- a/drivers/crypto/ccree/cc_driver.c
+++ b/drivers/crypto/ccree/cc_driver.c
@@ -529,24 +529,26 @@ static int init_cc_resources(struct platform_device *plat_dev)
goto post_req_mgr_err;
}
- /* Allocate crypto algs */
- rc = cc_cipher_alloc(new_drvdata);
+ /* hash must be allocated first due to use of send_request_init()
+ * and dependency of AEAD on it
+ */
+ rc = cc_hash_alloc(new_drvdata);
if (rc) {
- dev_err(dev, "cc_cipher_alloc failed\n");
+ dev_err(dev, "cc_hash_alloc failed\n");
goto post_buf_mgr_err;
}
- /* hash must be allocated before aead since hash exports APIs */
- rc = cc_hash_alloc(new_drvdata);
+ /* Allocate crypto algs */
+ rc = cc_cipher_alloc(new_drvdata);
if (rc) {
- dev_err(dev, "cc_hash_alloc failed\n");
- goto post_cipher_err;
+ dev_err(dev, "cc_cipher_alloc failed\n");
+ goto post_hash_err;
}
rc = cc_aead_alloc(new_drvdata);
if (rc) {
dev_err(dev, "cc_aead_alloc failed\n");
- goto post_hash_err;
+ goto post_cipher_err;
}
/* If we got here and FIPS mode is enabled
@@ -558,10 +560,10 @@ static int init_cc_resources(struct platform_device *plat_dev)
pm_runtime_put(dev);
return 0;
-post_hash_err:
- cc_hash_free(new_drvdata);
post_cipher_err:
cc_cipher_free(new_drvdata);
+post_hash_err:
+ cc_hash_free(new_drvdata);
post_buf_mgr_err:
cc_buffer_mgr_fini(new_drvdata);
post_req_mgr_err:
@@ -593,8 +595,8 @@ static void cleanup_cc_resources(struct platform_device *plat_dev)
(struct cc_drvdata *)platform_get_drvdata(plat_dev);
cc_aead_free(drvdata);
- cc_hash_free(drvdata);
cc_cipher_free(drvdata);
+ cc_hash_free(drvdata);
cc_buffer_mgr_fini(drvdata);
cc_req_mgr_fini(drvdata);
cc_fips_fini(drvdata);