From patchwork Fri Oct 8 22:27:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= X-Patchwork-Id: 12546641 X-Patchwork-Delegate: bhelgaas@google.com 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C711C433F5 for ; Fri, 8 Oct 2021 22:27:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 15A3560F51 for ; Fri, 8 Oct 2021 22:27:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243678AbhJHW3e (ORCPT ); Fri, 8 Oct 2021 18:29:34 -0400 Received: from mail-wr1-f52.google.com ([209.85.221.52]:33512 "EHLO mail-wr1-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243668AbhJHW3d (ORCPT ); Fri, 8 Oct 2021 18:29:33 -0400 Received: by mail-wr1-f52.google.com with SMTP id m22so33986901wrb.0; Fri, 08 Oct 2021 15:27:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tRYb2LPqEkxBD8lAFNonDclv6oFLdcwFLdTj/5b6MDk=; b=LyBFFZsf89P0e+LemiwYQniJYmZiCGMYuerx7adwNjIW7loaYFfsV5v5kyrFPRyNHa dejrjOqXbWwgGNUyqRAhJKcJLFcAIIheQmVitqs0EkJFyko0kBQ6iWGHQtiMhebAcSOx C5PTYPpvu6lOQvzbjc0OpsK7NeJXGs7iXl1VcrdU/FDk1duOIdmlReYYS61kZZaxAKjS LslgAAmIMbRHA7MKrglMtkR8MxSPklXfz437MSHj+W0kmTHOd16KkFMnOPK+3NQ5shSH GVX3hozar2lv3jyvDo+txEoI77Wmm5IkSyFrwUM+/2LY2rEPrh9TrkU78winVkSEEElm a3QA== X-Gm-Message-State: AOAM530L0wy56+uGI1cBQavXtGBoUR4l1tU0F+Zl1i4ja2Ud/f08e5PK Avx7hVmdMeBNlWGmCCtunfE= X-Google-Smtp-Source: ABdhPJykfILUWlH/p9qgCZRY8huJyNxoIwFsVOgEfc1eHeJlb/8jzAS/o+YbCbohkm4IdP2ZkhwlNg== X-Received: by 2002:adf:bb49:: with SMTP id x9mr7243973wrg.413.1633732056696; Fri, 08 Oct 2021 15:27:36 -0700 (PDT) Received: from workstation.lan ([95.155.85.46]) by smtp.gmail.com with ESMTPSA id b15sm549577wrr.90.2021.10.08.15.27.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Oct 2021 15:27:36 -0700 (PDT) From: =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Lorenzo Pieralisi , Boqun Feng , Long Li , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 3/3] PCI: Update variable type to match sscanf() format string Date: Fri, 8 Oct 2021 22:27:32 +0000 Message-Id: <20211008222732.2868493-3-kw@linux.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211008222732.2868493-1-kw@linux.com> References: <20211008222732.2868493-1-kw@linux.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org To test whether a string contains a valid PCI device path formatted as the "/." address (see output from "lspci -P" as an example; such format can also be provided as part of kernel command-line parameters), the function called pci_dev_str_match_path() can be used. Internally, pci_dev_str_match_path() function uses sscanf() and the "%x" format string as part of its path matching implementation where it would parse a given value as a unsigned hexadecimal number. This particular format string type requires the argument to be of an unsigned int type. Thus, to match given format string requirements and also safeguard against a potential undefined behaviour, change type of the variables passed to sscanf() to unsigned int accordingly. No change to functionality intended. Signed-off-by: Krzysztof Wilczyński --- drivers/pci/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index ce2ab62b64cf..7998b65e9ae5 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -269,7 +269,7 @@ static int pci_dev_str_match_path(struct pci_dev *dev, const char *path, const char **endptr) { int ret; - int seg, bus, slot, func; + unsigned int seg, bus, slot, func; char *wpath, *p; char end;