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authorEric Biggers <ebiggers@google.com>2018-05-19 22:07:37 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2018-05-27 00:12:08 +0800
commitfffe7d9279a48563fe4c19b07b649a583ac91a44 (patch)
tree01f5806dedea2392ba74a63dba0538a8dc63cd7d /crypto/crc32_generic.c
parentf16b613ca8b3e4960cdc5575e9b8e1dbdd7d54d5 (diff)
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crypto: crc32-generic - use unaligned access macros when needed
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> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/crc32_generic.c')
-rw-r--r--crypto/crc32_generic.c7
1 files changed, 4 insertions, 3 deletions
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;
}