}
            return new SmbNegotiation(smb2neg, r, negoReqBuffer, negoRespBuffer);
        } finally {
            int grantedCredits = r != null ? r.getGrantedCredits() : 0;
            if (grantedCredits == 0) {
                grantedCredits = 1;
            }
            this.credits.release(grantedCredits);
            Arrays.fill(this.sbuf, (byte) 0);
        }