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[1/6] crypto: crc32-generic - use unaligned access macros when needed

Message ID 20180520050742.5008-2-ebiggers3@gmail.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Eric Biggers May 20, 2018, 5:07 a.m. UTC 
From: Eric Biggers <ebiggers@google.com>

crc32-generic doesn't have a cra_alignmask set, which is desired as its
->update() works with any alignment.  However, it incorrectly assumes
4-byte alignment in ->setkey() and when outputting the final digest.

Fix this by using the unaligned access macros in those cases.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 crypto/crc32_generic.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/crypto/crc32_generic.c b/crypto/crc32_generic.c
index 718cbce8d169..20b879881a2d 100644
--- a/crypto/crc32_generic.c
+++ b/crypto/crc32_generic.c
@@ -29,6 +29,7 @@ 
  * This is crypto api shash wrappers to crc32_le.
  */
 
+#include <asm/unaligned.h>
 #include <linux/crc32.h>
 #include <crypto/internal/hash.h>
 #include <linux/init.h>
@@ -69,7 +70,7 @@  static int crc32_setkey(struct crypto_shash *hash, const u8 *key,
 		crypto_shash_set_flags(hash, CRYPTO_TFM_RES_BAD_KEY_LEN);
 		return -EINVAL;
 	}
-	*mctx = le32_to_cpup((__le32 *)key);
+	*mctx = get_unaligned_le32(key);
 	return 0;
 }
 
@@ -96,7 +97,7 @@  static int crc32_update(struct shash_desc *desc, const u8 *data,
 static int __crc32_finup(u32 *crcp, const u8 *data, unsigned int len,
 			 u8 *out)
 {
-	*(__le32 *)out = cpu_to_le32(__crc32_le(*crcp, data, len));
+	put_unaligned_le32(__crc32_le(*crcp, data, len), out);
 	return 0;
 }
 
@@ -110,7 +111,7 @@  static int crc32_final(struct shash_desc *desc, u8 *out)
 {
 	u32 *crcp = shash_desc_ctx(desc);
 
-	*(__le32 *)out = cpu_to_le32p(crcp);
+	put_unaligned_le32(*crcp, out);
 	return 0;
 }