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[188.121.15.3]) by smtp.gmail.com with ESMTPSA id i76sm1215134lfi.83.2020.05.05.01.29.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2020 01:29:04 -0700 (PDT) From: Mariusz Skamra To: linux-bluetooth@vger.kernel.org Cc: Mariusz Skamra Subject: [PATCH BlueZ] client: Update write callbacks with invalid offset error handlers Date: Tue, 5 May 2020 10:29:01 +0200 Message-Id: <20200505082901.258762-1-mariusz.skamra@codecoup.pl> X-Mailer: git-send-email 2.25.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org This patch adds invalid offset handlers to write callbacks of attributes. --- client/gatt.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/client/gatt.c b/client/gatt.c index 416eda953..5713f8343 100644 --- a/client/gatt.c +++ b/client/gatt.c @@ -2141,6 +2141,12 @@ static void authorize_write_response(const char *input, void *user_data) goto error; } + if (aad->offset > chrc->value_len) { + err = "org.bluez.Error.InvalidOffset"; + + goto error; + } + /* Authorization check of prepare writes */ if (prep_authorize) { reply = g_dbus_create_reply(pending_message, DBUS_TYPE_INVALID); @@ -2272,6 +2278,11 @@ static DBusMessage *chrc_write_value(DBusConnection *conn, DBusMessage *msg, return NULL; } + if (offset > chrc->value_len) + return g_dbus_create_error(msg, + "org.bluez.Error.InvalidOffset", NULL); + + /* Authorization check of prepare writes */ if (prep_authorize) return g_dbus_create_reply(msg, DBUS_TYPE_INVALID); @@ -2683,6 +2694,10 @@ static DBusMessage *desc_write_value(DBusConnection *conn, DBusMessage *msg, return g_dbus_create_error(msg, "org.bluez.Error.InvalidArguments", NULL); + if (offset > desc->value_len) + return g_dbus_create_error(msg, + "org.bluez.Error.InvalidOffset", NULL); + if (write_value(&desc->value_len, &desc->value, value, value_len, offset, desc->max_val_len)) return g_dbus_create_error(msg, -- 2.25.4