ksmbd: fix wrong compression context size

Use smb2_compression_ctx instead of smb2_encryption_neg_context.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/ksmbd/smb2pdu.c

@@ -924,7 +924,7 @@ static int decode_compress_ctxt(struct ksmbd_conn *conn,
 	 * Return compression context size in request.
 	 * So need to plus extra number of CompressionAlgorithms size.
 	 */
-	return sizeof(struct smb2_encryption_neg_context) +
+	return sizeof(struct smb2_compression_ctx) +
 		((algo_cnt - 1) * 2);
 }