From nobody Mon Feb 9 13:03:24 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21806C0015E for ; Sat, 15 Jul 2023 15:43:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230092AbjGOPnM (ORCPT ); Sat, 15 Jul 2023 11:43:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229812AbjGOPnK (ORCPT ); Sat, 15 Jul 2023 11:43:10 -0400 Received: from out203-205-221-233.mail.qq.com (out203-205-221-233.mail.qq.com [203.205.221.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 474A22691 for ; Sat, 15 Jul 2023 08:43:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1689435486; bh=tH77A15Ade+v8Xa3lNIHljdaKcKR/DpW3s/OQ9AJ5WE=; h=From:To:Cc:Subject:Date; b=OCJOIkGhJUXxE85RdGXsQO7eWTeR78fLPkeSefJP7G5S5PWPGVl/mEDl/BuFqb95D EU94F0IJpH76umy4U5855TlgWV4MoAtK9qmeycXF9biQTtrS0sh14voRu59RGAg1EX ULOkRJpkqxLu1duQLQ0tgrFR5SahnyA5RKYjx8cw= Received: from KernelDevBox.byted.org ([180.184.103.200]) by newxmesmtplogicsvrszb6-0.qq.com (NewEsmtp) with SMTP id 9841C8C2; Sat, 15 Jul 2023 23:38:04 +0800 X-QQ-mid: xmsmtpt1689435484tpuwmxqwc Message-ID: X-QQ-XMAILINFO: MyIXMys/8kCtqlzyZD5fZ66S5O1yMINElNdDOXiFXViD2bjV6oZcWseDr7zDdv ti9FENQv3bnbvkBoDIVJBYSOOclwxdKiONknmMyiLp7S1PvCnp12i1Olc2XYY3TzJHgYe96+NwI3 g9i1Y2xQmqAYM998dHb7zKTFUuwQb+KQO/XT++pCw7t/5p1ZYaX+mpM6WlyyF7USDMBt7XR3MrZn gui5iU8SIZ+8eOFf7z/ybIMTINEmvmSqXqbE69zMUnBOgTDb+JoGrlvkZytKZx3t9Gv4HryWH99V lkJX6bz4pX8lR4HWV75Ou0i9g4IXfkjAk60LlKl+EPkt88linoGGjCQzcGCK6llhovjVl4REUt8a 8DihDC5Jc/GgA6oA5ZaCcWxf0Nd3ASsUe+n+ZouJdryvip6sqFDdTWOe/85GYuynbSmY+IiInazK VIq2AzrnNRqPwbEuTIEl67qVhOmb/3Ltl/auJb85kbJIcfKkkQV0EkzO+kqOeyVCI9XrKZ5okZN4 LcUooAI9LsPL+cuABBDBPJiJLYW7JgyhXroBJEI4+XLsRI00nZ9L/YjO4hPYEPefPmqdA3sD2y/Y 5crWgbtDPYr3X2aW5ZX+eeK1TFRDQSO1a79PuvpQuyDJc3khcu6oQvJEh2gBHp9O1k5R2frlhYf6 L5cWYrdANU59defCIOLdGzFEu9EibPtATSpY7O5PgifwhP5VZw0XuaWFpdrsMFH8ahmnKD5/lGXk hI6gRYUrPzNuLHN0EBbBziQDKMsBG0XRwBjOFXVgllpPi2xhj+PpW6bzQE0Ju6yYeDWSIKjHQWtq sqZVSTG+950J1xr7qjAiii6rL95biXX2PonFxbhAemlK6pWJJveXWNJh2xBm0EXu+994Qw828MtX IjHpOHWFNJOxyl39x8f7+dIQbVURmlLIZIXRqPuxN2YOCu1epiyldGPrMurHJlhYzW9hlzbPHpic JEg0LOWj4lCUSaE4aZlYGQCy5cAqt2142C6TSPsgNEfgjByksY8P07pQ2qX10fhIcT/Cc3+O4= X-QQ-XMRINFO: NyFYKkN4Ny6FSmKK/uo/jdU= From: Zhang Shurong To: vkoul@kernel.org Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, Zhang Shurong Subject: [PATCH] dmaengine: mv_xor: fix to avoid potential NULL pointer dereference Date: Sat, 15 Jul 2023 23:38:03 +0800 X-OQ-MSGID: <20230715153803.2275585-1-zhang_shurong@foxmail.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" of_match_device() may fail and returns a NULL pointer. Fix this by checking the return value of of_match_device(). Fixes: dd130c652cb7 ("dmaengine: mv_xor: use SoC type instead of directly t= he operation mode") Signed-off-by: Zhang Shurong --- drivers/dma/mv_xor.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 23b232b57518..317815ec1dd6 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -1333,6 +1333,9 @@ static int mv_xor_probe(struct platform_device *pdev) of_match_device(mv_xor_dt_ids, &pdev->dev); =20 + if (!of_id) + return -ENODEV; + xordev->xor_type =3D (uintptr_t)of_id->data; } =20 --=20 2.30.2