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[82.218.28.181]) by smtp.gmail.com with ESMTPSA id bd21-20020a056402207500b0046bb7503d9asm728424edb.24.2022.12.09.06.53.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Dec 2022 06:53:33 -0800 (PST) From: =?utf-8?q?Christoph_B=C3=B6hmwalder?= To: Jens Axboe Cc: drbd-dev@lists.linbit.com, linux-kernel@vger.kernel.org, Lars Ellenberg , Philipp Reisner , linux-block@vger.kernel.org, Robert Altnoeder , =?utf-8?q?Christoph_B=C3=B6?= =?utf-8?q?hmwalder?= , Joel Colledge Subject: [PATCH 2/8] drbd: fix DRBD_VOLUME_MAX 65535 -> 65534 Date: Fri, 9 Dec 2022 15:53:21 +0100 Message-Id: <20221209145327.2272271-3-christoph.boehmwalder@linbit.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221209145327.2272271-1-christoph.boehmwalder@linbit.com> References: <20221209145327.2272271-1-christoph.boehmwalder@linbit.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1751748603763742853?= X-GMAIL-MSGID: =?utf-8?q?1751748603763742853?= From: Robert Altnoeder The protocol uses -1 as a reserved value for 'no specific volume', and since the protocol field is a 16 bit unsigned value, -1 is converted to 65535. Therefore, limit the range of valid volume numbers to [0, 65534]. Signed-off-by: Robert Altnoeder Signed-off-by: Christoph Böhmwalder Reviewed-by: Joel Colledge --- include/linux/drbd_limits.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index d64271ccece4..058f7600f79c 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -21,7 +21,7 @@ #define DRBD_MINOR_COUNT_DEF 32 #define DRBD_MINOR_COUNT_SCALE '1' -#define DRBD_VOLUME_MAX 65535 +#define DRBD_VOLUME_MAX 65534 #define DRBD_DIALOG_REFRESH_MIN 0 #define DRBD_DIALOG_REFRESH_MAX 600