[PATCH 1/2] KEYS: trusted: fix DCP blob payload length assignment

[David Gstir]

The DCP trusted key type uses the wrong helper function to store
the blob's payload length which can lead to the wrong byte order
being used in case this would ever run on big endian architectures.

Fix by using correct helper function.

Signed-off-by: David Gstir <david at sigma-star.at>
Suggested-by: Richard Weinberger <richard at nod.at>
Reported-by: kernel test robot <lkp at intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202405240610.fj53EK0q-lkp@intel.com/
Fixes: 2e8a0f40a39c ("KEYS: trusted: Introduce NXP DCP-backed trusted keys")
---
 security/keys/trusted-keys/trusted_dcp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/keys/trusted-keys/trusted_dcp.c b/security/keys/trusted-keys/trusted_dcp.c
index b5f81a05be36..b0947f072a98 100644
--- a/security/keys/trusted-keys/trusted_dcp.c
+++ b/security/keys/trusted-keys/trusted_dcp.c
@@ -222,7 +222,7 @@ static int trusted_dcp_seal(struct trusted_key_payload *p, char *datablob)
 		return ret;
 	}
 
-	b->payload_len = get_unaligned_le32(&p->key_len);
+	put_unaligned_le32(p->key_len, &b->payload_len);
 	p->blob_len = blen;
 	return 0;
 }
-- 
2.35.3