From nobody Fri Apr 3 02:23:05 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 247B7ECAAA1 for ; Sat, 17 Sep 2022 01:54:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229675AbiIQBya (ORCPT ); Fri, 16 Sep 2022 21:54:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229379AbiIQBy1 (ORCPT ); Fri, 16 Sep 2022 21:54:27 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72BBC14D3D for ; Fri, 16 Sep 2022 18:54:24 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id r23so13315586pgr.6 for ; Fri, 16 Sep 2022 18:54:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=keTdwxKvPiWSHaxWsk/YUDS9Y6Zxt3ItQiWrzrZOVyI=; b=Lr9NP6vv3KGni9Beu4+owg7rEHXKnw+p2SBCamYzVmS36lCX7inSWOfseW9ux90HmV RQRN37phIl/9lfUHQirj56g3mb5lzHm4f9i2KYJULzNLgGOCYWE0b2rG0Y8oPI423A1Y rbmoWanTNaf5LVmxOvNtvAG3m6abWFUSOkfMprfirsCvPVi6jlwg6HbSJCQNeYaZ4rCw Ihge+RGCuIpqLMVsPzuCF3hF8DuP/7MAszty9/9sUEU+cKRrgpYfUoScXjRTQ8oOykxO xSQzsmWv5OuczBobVhW390hiRMdBJ12dE2mSs9RgbrnGjE9agA9clLi+SCFQv+pUXx7o 0ndQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=keTdwxKvPiWSHaxWsk/YUDS9Y6Zxt3ItQiWrzrZOVyI=; b=v2y8DHAC/kQvoTD0mvAvhw+XrWgaLWkozp2vi0Y1f7XE4xqRkq9WHx6eedWbyAqft5 KizvVJCx6/7+wRAGqYoo8F+HCrRkEJvEjeXBfwGL/vcFolSXCpeFjJxuSszq85XQgjYE uab3KHM3kpjlpqHofOVtg8xnmG9DdmvTm5FDD6qYKKUBr+QgR4EIqj6VXKqGNYtWIOxg EmmOhJn0CxNda0jkuq+2e7SZOQ71cxo3SMj6H6zV80aqGD71fD+KMWutGhMPhW/eRqQd cTyujywDNu671snL46bM4WitVTQ05I99sgmjQUyCxoyQ3pfdDEELskBZULNO7v/nJOrw fi6g== X-Gm-Message-State: ACrzQf3T1wBVgbZ3L65kwcAgZ1gUvOhwscWFUSWzmTkZlwXr5BbpKtbS IT2MLHc3Lk1nCveCfLf6T2YWQX8tQxd9ZA== X-Google-Smtp-Source: AMsMyM6Rgczh03NnWGM0gdaT9Ivw4BeI32DD+zo8v3BlDSSwkRTLBOHGfk8uhqbAy3kzI4ayHc+HzA== X-Received: by 2002:a65:5504:0:b0:42a:352d:c79c with SMTP id f4-20020a655504000000b0042a352dc79cmr7298276pgr.58.1663379663474; Fri, 16 Sep 2022 18:54:23 -0700 (PDT) Received: from localhost.localdomain (lily-optiplex-3070.dynamic.ucsd.edu. [2607:f720:1300:3033::1:4dd]) by smtp.googlemail.com with ESMTPSA id 75-20020a62174e000000b0054223a0185asm13822068pfx.161.2022.09.16.18.54.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Sep 2022 18:54:22 -0700 (PDT) From: Li Zhong To: linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, Li Zhong Subject: [PATCH v1] kernel/irq/manage: check return value of irq_data_get_irq_chip() Date: Fri, 16 Sep 2022 18:53:48 -0700 Message-Id: <20220917015348.3831203-1-floridsleeves@gmail.com> X-Mailer: git-send-email 2.25.1 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" Check the return value chip of irq_data_get_irq_chip(), which could be NULL and result in null pointer dereference if unchecked. Signed-off-by: Li Zhong --- kernel/irq/manage.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 40fe7806cc8c..1f967050338b 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -202,6 +202,8 @@ static void irq_validate_effective_affinity(struct irq_= data *data) =20 if (!cpumask_empty(m)) return; + if (!chip) + return; pr_warn_once("irq_chip %s did not update eff. affinity mask of irq %u\n", chip->name, data->irq); } --=20 2.25.1