[PATCH v2 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.

Cc: stable at vger.kernel.org # v6.10+
Fixes: 2e8a0f40a39c ("KEYS: trusted: Introduce NXP DCP-backed trusted keys")
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/
Signed-off-by: David Gstir <david at sigma-star.at>
Signed-off-by: Jarkko Sakkinen <jarkko at kernel.org>
---
v1 -> v2: fix ordering of commit tags, add s-o-b from Jarkko Sakkinen

 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