diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 67e8e28e3fc3..ff5323d5fb50 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -8500,7 +8500,7 @@ static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
 	struct smb2_hdr *hdr = smb2_get_msg(old_buf);
 	unsigned int orig_len = get_rfc1002_len(old_buf);
 
-	memset(tr_buf, 0, sizeof(struct smb2_transform_hdr) + 4);
+	/* tr_buf must be cleared by the caller */
 	tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
 	tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
 	tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);