diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 875eecc6b95e..abe7ea1c8a2f 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -7770,7 +7770,7 @@ int smb2_ioctl(struct ksmbd_work *work)
 
 		off = le64_to_cpu(zero_data->FileOffset);
 		bfz = le64_to_cpu(zero_data->BeyondFinalZero);
-		if (off > bfz) {
+		if (off < 0 || bfz < 0 || off > bfz) {
 			ret = -EINVAL;
 			goto out;
 		}