[PATCH 2/5] crypto: cast6 - use memcpy_and_pad() in __cast6_setkey()

From: Thorsten Blum

Date: Mon Sep 21 2026 - 02:13:26 EST


Use memcpy_and_pad() instead of separate memcpy() and memset() calls to
simplify __cast6_setkey().

Signed-off-by: Thorsten Blum <blum@xxxxxxxxxx>
---
crypto/cast6_generic.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/crypto/cast6_generic.c b/crypto/cast6_generic.c
index 4c08c42646f0..9b6bdd2aa511 100644
--- a/crypto/cast6_generic.c
+++ b/crypto/cast6_generic.c
@@ -112,8 +112,7 @@ int __cast6_setkey(struct cast6_ctx *c, const u8 *in_key, unsigned int key_len)
if (key_len % 4 != 0)
return -EINVAL;

- memset(p_key, 0, 32);
- memcpy(p_key, in_key, key_len);
+ memcpy_and_pad(p_key, sizeof(p_key), in_key, key_len, 0);

key[0] = be32_to_cpu(p_key[0]); /* A */
key[1] = be32_to_cpu(p_key[1]); /* B */