From patchwork Mon Jun 21 22:50:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Ryazanov X-Patchwork-Id: 465606 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01F37C4743C for ; Mon, 21 Jun 2021 22:51:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D38086134F for ; Mon, 21 Jun 2021 22:51:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232342AbhFUWx2 (ORCPT ); Mon, 21 Jun 2021 18:53:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232283AbhFUWxY (ORCPT ); Mon, 21 Jun 2021 18:53:24 -0400 Received: from mail-lj1-x22a.google.com (mail-lj1-x22a.google.com [IPv6:2a00:1450:4864:20::22a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2E67C061756 for ; Mon, 21 Jun 2021 15:51:08 -0700 (PDT) Received: by mail-lj1-x22a.google.com with SMTP id a21so2280966ljj.1 for ; Mon, 21 Jun 2021 15:51:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=8YszF+KJknlKGnazgpJVo3N5S+om/qdEPsz9YOytr4g=; b=lDA3R2JGrMcf1sfoSXfEDo9PNFukwoYNwOlM0+I4UlqQGzFyFzUsE0NnLcCEqQ5vgm f8Pe4RX7yhI97ZD6S6ARtKcCeK0BCX6H7FqPSkKVCEnPor/NKGNi/rcN3LR22HRYAJeO JCksutqX6ep1psWW9TS99FFu2k3hICyBanoa/4j2U6XkQ7KKGR9NI1XSfCGmDJf8mdTG MjqzhIaGLZ50bwdDkq2b7e7DB4wslj/4ipuyyCkyXMLftp6VFOIMFhb7u5HgrZptZNY7 w32rPIHEhZrYenQUkwXFguoLjWQsyRHIBELVhBAWXZB3843FQLR7lGt2TsvFEp5FzJz3 MRkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=8YszF+KJknlKGnazgpJVo3N5S+om/qdEPsz9YOytr4g=; b=n9p/balbA8sjmjzsmCGcQ7QU1vSmwvnlh/pDqKtgsW4jLVjwsB3ovGJ6LucxvAewZA hZUEOtvsY1WV7uVKOUxFU2DI8LMZYAjN63zKuBauU1G/4/R0pam0l/6URG2t9D2qaqNJ EsnqpkFuD7SasWl52UNRrZr9qHsy27m9bX78AhTfMNbwEeS1pGa32APTObAxT+22NJEi KIhEfragcXFG455RTULGbgHsncCK3Oxan0Daq7QfXEj27cmtTol4de7gC9pr+fKA8vdH BeUwzLXOobblS0rghNORz0/yLPvgWATpGiK74XhoKptTpUDDDaCLOB1VT/SldR+/4ZkC qTTQ== X-Gm-Message-State: AOAM531xOy0S7X5IhOV3xEEcz9CETXQJOYHeBWfwJIkozbVdOK7M+TB7 eB5Vw2TO83DTRVrp99NtLFc= X-Google-Smtp-Source: ABdhPJwDN4n5ofMk84XSXCOZAfGzGSKu2NXnxhmVYqkW4fWVBoI/q6/4cv2a0wFpQadIdjfRa050lg== X-Received: by 2002:a2e:b618:: with SMTP id r24mr452310ljn.48.1624315867381; Mon, 21 Jun 2021 15:51:07 -0700 (PDT) Received: from rsa-laptop.internal.lan ([217.25.229.52]) by smtp.gmail.com with ESMTPSA id x207sm124826lff.53.2021.06.21.15.51.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Jun 2021 15:51:07 -0700 (PDT) From: Sergey Ryazanov To: Loic Poulain , Johannes Berg , "David S. Miller" , Jakub Kicinski Cc: netdev@vger.kernel.org Subject: [PATCH net-next v2 03/10] wwan: core: require WWAN netdev setup callback existence Date: Tue, 22 Jun 2021 01:50:53 +0300 Message-Id: <20210621225100.21005-4-ryazanov.s.a@gmail.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210621225100.21005-1-ryazanov.s.a@gmail.com> References: <20210621225100.21005-1-ryazanov.s.a@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The setup callback will be unconditionally passed to the alloc_netdev_mqs(), where the NULL pointer dereference will cause the kernel panic. So refuse to register WWAN netdev ops with warning generation if the setup callback is not provided. Signed-off-by: Sergey Ryazanov Reviewed-by: Loic Poulain --- v1 -> v2: * no changes drivers/net/wwan/wwan_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wwan/wwan_core.c b/drivers/net/wwan/wwan_core.c index 688a7278a396..1bd472195813 100644 --- a/drivers/net/wwan/wwan_core.c +++ b/drivers/net/wwan/wwan_core.c @@ -917,7 +917,7 @@ int wwan_register_ops(struct device *parent, const struct wwan_ops *ops, { struct wwan_device *wwandev; - if (WARN_ON(!parent || !ops)) + if (WARN_ON(!parent || !ops || !ops->setup)) return -EINVAL; wwandev = wwan_create_dev(parent);