From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5DD7DC31E57 for ; Mon, 17 Jun 2019 12:51:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E76A2182B for ; Mon, 17 Jun 2019 12:51:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="q/VQwMJ7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728007AbfFQMvU (ORCPT ); Mon, 17 Jun 2019 08:51:20 -0400 Received: from mail-wm1-f68.google.com ([209.85.128.68]:38671 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727912AbfFQMvO (ORCPT ); Mon, 17 Jun 2019 08:51:14 -0400 Received: by mail-wm1-f68.google.com with SMTP id s15so8978517wmj.3 for ; Mon, 17 Jun 2019 05:51:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Yh8KWN22mWMhTl8rcvEzBYBWJNOHxR/ZVbPRRDE/D+g=; b=q/VQwMJ7CaCCS2TpiY40tB9SR/0BGYUD9cg5QmvyZlgN0oSe9DGo/a+8W3tFnih/es f/TGbxw2+NhrkghexAa4OElVuqj6adr3zChACFmOr55PBTOD/M1NIEdtp5/IEy9qU/kC fX2Qrs7PhDGqUidNClIWZ04Lwg4RW4iXSfsUN/mQ3Fz6ReP9i0AdV914a9optyVwxJ9W Xy6Y1mSeoVn1NeqGDQGLUT+gzK0PwP6QYlI5aEiS1G795pxPRN55vGKPX1Kr7l+p8xwx 9xxVx3Oo0mrnM/HpISh/Sd3kMq4WHV1BoTnn1nr+LgaU5NktIDT5p1PPAhig5lYx1wqZ dRuw== 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; bh=Yh8KWN22mWMhTl8rcvEzBYBWJNOHxR/ZVbPRRDE/D+g=; b=tFRt4z3cu9g+V4A3Eu6ORVuWjzQn7x9nEVeJCoIOzhxRB7NjKqor2GZ75KDb06dJ27 iqVqCydBQi64yu+ewkErAdahsZW38YFOu4ApRWyDv4d5aqMXyWep/a4h6FQkahHkaQO6 0WnIIQDbqO5WlJIHgoSWpZBJqcfJARIBD5TjqJExdTbf/ga9mTrkK5pQj2HPP8AfF1JW 5+vftI2jIsOiLj3UB0SUcwQ20wrz4KYvMdYWan34tjZDqZun9OFK6GsOj0EB+6oA3ld/ SwTk3oPdhlIt4LY7LrTRK1Ew0xOW3IHP7tsvLmWmXRLWw5LfQMZgRDKOFd6gJRx0BZV5 l4Fw== X-Gm-Message-State: APjAAAVCSTpss/pWRcx0pXTa2Zs1mNeRuTI0/mFn+LjOGYJYT4Le48uB fVq6L12L1u7LFhMb+kBnzCsoxw== X-Google-Smtp-Source: APXvYqyQ7uC0yXE6+rCbtoO1nXI3vuubKGuLiHCQLeIEVsa7DW/HvoU6icIxjcUwUpeyeJFFHJ6L2g== X-Received: by 2002:a1c:63c4:: with SMTP id x187mr17953607wmb.4.1560775872645; Mon, 17 Jun 2019 05:51:12 -0700 (PDT) Received: from dell.watershed.co.uk ([2.27.35.243]) by smtp.gmail.com with ESMTPSA id o11sm10477852wmh.37.2019.06.17.05.51.11 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Jun 2019 05:51:12 -0700 (PDT) From: Lee Jones To: alokc@codeaurora.org, agross@kernel.org, david.brown@linaro.org, bjorn.andersson@linaro.org, balbi@kernel.org, gregkh@linuxfoundation.org, ard.biesheuvel@linaro.org, jlhugo@gmail.com, linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, felipe.balbi@linux.intel.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Lee Jones Subject: [RESEND v4 4/4] usb: dwc3: qcom: Improve error handling Date: Mon, 17 Jun 2019 13:51:05 +0100 Message-Id: <20190617125105.6186-5-lee.jones@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190617125105.6186-1-lee.jones@linaro.org> References: <20190617125105.6186-1-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org dwc3_qcom_clk_init() is called with of_count_phandle_with_args() as an argument. If of_count_phandle_with_args() returns an error, the number of clocks will be a negative value and will lead to undefined behaviour. Ensure we check for an error before attempting to blindly use the value. Signed-off-by: Lee Jones Reviewed-by: Bjorn Andersson --- drivers/usb/dwc3/dwc3-qcom.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 2d050303d564..c59e9d8e8609 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -409,6 +409,9 @@ static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) if (!np || !count) return 0; + if (count < 0) + return count; + qcom->num_clocks = count; qcom->clks = devm_kcalloc(dev, qcom->num_clocks, -- 2.17.1