diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 7228179ef5b009be2259d14a5e3808070448b7f2..0c684ae4c07163140f4d9009b2d2ccd1f0c86dd2 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -521,7 +521,7 @@ is_valid_oplock_break(struct smb_hdr *buf, struct TCP_Server_Info *srv)
 			(struct smb_com_transaction_change_notify_rsp *)buf;
 		struct file_notify_information *pnotify;
 		__u32 data_offset = 0;
-		if (pSMBr->ByteCount > sizeof(struct file_notify_information)) {
+		if (get_bcc_le(buf) > sizeof(struct file_notify_information)) {
 			data_offset = le32_to_cpu(pSMBr->DataOffset);
 
 			pnotify = (struct file_notify_information *)