From patchwork Thu Dec 12 09:49:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joe Hattori X-Patchwork-Id: 850746 Received: from mail-pg1-f178.google.com (mail-pg1-f178.google.com [209.85.215.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E6F5B153800 for ; Thu, 12 Dec 2024 09:49:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733996994; cv=none; b=mptPGdcslVcwXy8tsBzlfFr+L+SSOa2w/nizC+rJiYzJ7shx2XPv6Fvf7ag3figeWYtMSDhD3ce20JD/wzZbaodZ2jNvC0n6kloOjFAOp9lZKzs3ZaD7Joz3hp/COx79LJQX48yYG2H0uqprwIhGWupssM0BX/F87xjqHbWZCco= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733996994; c=relaxed/simple; bh=s81qkoUSIoACM58iDiCwAec13spS5htj6r4Sfr88sQc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=RZqVVv6vLqXo4atTRkMgsK3YMNoA1UT0n8yOV1nWtWvxTiw0rZYx+/7L5qHYzJXhtNwoaX1bQ6TJF3RTMMzNwAdh5Ic41RZcdjwWURs8U5nKqvEQ30euaHlZgXSwChXgpiVXmvz6cWr6/B1tjSJwTbhqoLnu2umTz+dsl/HaV/8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=pf.is.s.u-tokyo.ac.jp; spf=none smtp.mailfrom=pf.is.s.u-tokyo.ac.jp; dkim=pass (2048-bit key) header.d=pf-is-s-u-tokyo-ac-jp.20230601.gappssmtp.com header.i=@pf-is-s-u-tokyo-ac-jp.20230601.gappssmtp.com header.b=cztbVQQA; arc=none smtp.client-ip=209.85.215.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=pf.is.s.u-tokyo.ac.jp Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=pf.is.s.u-tokyo.ac.jp Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=pf-is-s-u-tokyo-ac-jp.20230601.gappssmtp.com header.i=@pf-is-s-u-tokyo-ac-jp.20230601.gappssmtp.com header.b="cztbVQQA" Received: by mail-pg1-f178.google.com with SMTP id 41be03b00d2f7-7fbc65f6c72so392168a12.1 for ; Thu, 12 Dec 2024 01:49:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=pf-is-s-u-tokyo-ac-jp.20230601.gappssmtp.com; s=20230601; t=1733996992; x=1734601792; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Yx/0fdgxjKDGAMHYgncy5mU2Vm1CuDbaOYTtTgjXVXI=; b=cztbVQQASad10KpVSGJMC743oj/LrUvDhfLRiGZnMxwt5amIZvkEKT92PO5WSETGdj 7lTJod6zCi1iGBZ6Z6MI0x4RP1So4GBxkdhcwvwPRPmoBp+PJLtzEUwcmmyLESeXO+3A KfgwoVwcXsF/V5YieO8EQhJY+/FsSEzWql5Lyac/m5tLHkeo+dRMzyMiO/KCOGCv67y3 GZN9TGXDw9AgFfqeJbMtn5EOq/39zzyiv/uGKEVy7TXOJEhvEfWHhBYFyk33qNxAu91B U6eHepa990YKIvniuugKSGw0JU+xQYoyv1iqorqXVmMph/MjXM88vMfzf0vbgDCMjjb4 bdJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733996992; x=1734601792; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Yx/0fdgxjKDGAMHYgncy5mU2Vm1CuDbaOYTtTgjXVXI=; b=lcQJO7vLOYldzPD4Jb5c46vaV0bKeoT2lHIv5nEf5KVaKNrS50Vw0edr+aTFwzgtQd 8wKLdi0Y9cl2a3pvfgNwGcP2jKOKQhGxiVSNJcQuc3jL4mEVWyZhijrVksl9SqJPpFxB thIcG3HW7+JvSd3496lueGWhyttQoxGRUGhVbbQjYHAbeke2YxBTnWbDBo5brLyJzPcq J1Dvh6Ba5ojYfNmBBYrYFDH4FpwQjTkL3UmVYlevbLGPjCDu7uzgo5cCaROePs5cvnHy 49sBkQTP48MWu5Canm3eDQTMtFF2BsHRFctUJmSRn21PJS0QJvUawTzhg2sA7U8wRnCv +Hcg== X-Gm-Message-State: AOJu0YzUNsZzLALRPqEp/z+7e2+cBPLI6fbz/dv4aNgahGRIbRUbgnBm TQrqUbCtYbUP9WIqvNLAaO8sroNvmRh6yxeuac2jWevMvkTfxMFEJH9uYOzObDI= X-Gm-Gg: ASbGnctW/Zy76OMULSeTzrOMZHBFVVbkQeASP+eyG+m47rQcX2GK579C+weH8qXcUwO 4b6zqBBEaCvl+jTEmUVPeCcMeEbH1JSNo3+4XNgIR9lpQlXj0iRNrFBYSYJcOSFgdj9yp20BknC FgOxy3mQAVngCjddglxb+Ccy1cv0hrjklTZjey8wPcFjX0/PbV5X25pcKeH1iCnLLCxo9kXjXcI 9LTO4p5pQABwaehA3VLDkwikDzCqGxXprMXT2XUxStYCjPj+x5iP0URxpRuLA1DobJaCWurRZ+9 Dy2ktlYJb7OUo3RpLWhTBeYia1mEejecu/Xlc4HFIkM= X-Google-Smtp-Source: AGHT+IG3Iz5dRJ5sBcw7SXyRAd9ifotl+/tTrmFy4GLzX26DqsnCMCjd/ftOnykjadUym1K0y6Yrlg== X-Received: by 2002:a05:6a21:e92:b0:1db:eff0:6ae7 with SMTP id adf61e73a8af0-1e1cec0abb8mr4140267637.33.1733996992166; Thu, 12 Dec 2024 01:49:52 -0800 (PST) Received: from localhost.localdomain (133-32-227-190.east.xps.vectant.ne.jp. [133.32.227.190]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-725dc0bb650sm8713034b3a.101.2024.12.12.01.49.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Dec 2024 01:49:51 -0800 (PST) From: Joe Hattori To: peter.chen@kernel.org, gregkh@linuxfoundation.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com Cc: linux-usb@vger.kernel.org, Joe Hattori , stable@vger.kernel.org Subject: [PATCH] usb: chipidea: ci_hdrc_imx: decrement device's refcount on the error path of .probe() Date: Thu, 12 Dec 2024 18:49:45 +0900 Message-Id: <20241212094945.3784866-1-joe@pf.is.s.u-tokyo.ac.jp> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Current implementation of ci_hdrc_imx_probe() does not decrement the refcount of the device obtained in usbmisc_get_init_data(). Add a put_device() call before returning an error after the call. This bug was found by an experimental static analysis tool that I am developing. Cc: stable@vger.kernel.org Fixes: f40017e0f332 ("chipidea: usbmisc_imx: Add USB support for VF610 SoCs") Signed-off-by: Joe Hattori --- drivers/usb/chipidea/ci_hdrc_imx.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c index f2801700be8e..6418052264f2 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -370,25 +370,29 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) data->pinctrl = devm_pinctrl_get(dev); if (PTR_ERR(data->pinctrl) == -ENODEV) data->pinctrl = NULL; - else if (IS_ERR(data->pinctrl)) - return dev_err_probe(dev, PTR_ERR(data->pinctrl), + else if (IS_ERR(data->pinctrl)) { + ret = dev_err_probe(dev, PTR_ERR(data->pinctrl), "pinctrl get failed\n"); + goto err_put; + } data->hsic_pad_regulator = devm_regulator_get_optional(dev, "hsic"); if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) { /* no pad regulator is needed */ data->hsic_pad_regulator = NULL; - } else if (IS_ERR(data->hsic_pad_regulator)) - return dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator), + } else if (IS_ERR(data->hsic_pad_regulator)) { + ret = dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator), "Get HSIC pad regulator error\n"); + goto err_put; + } if (data->hsic_pad_regulator) { ret = regulator_enable(data->hsic_pad_regulator); if (ret) { dev_err(dev, "Failed to enable HSIC pad regulator\n"); - return ret; + goto err_put; } } } @@ -402,13 +406,14 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) dev_err(dev, "pinctrl_hsic_idle lookup failed, err=%ld\n", PTR_ERR(pinctrl_hsic_idle)); - return PTR_ERR(pinctrl_hsic_idle); + ret = PTR_ERR(pinctrl_hsic_idle); + goto err_put; } ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle); if (ret) { dev_err(dev, "hsic_idle select failed, err=%d\n", ret); - return ret; + goto err_put; } data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl, @@ -417,7 +422,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) dev_err(dev, "pinctrl_hsic_active lookup failed, err=%ld\n", PTR_ERR(data->pinctrl_hsic_active)); - return PTR_ERR(data->pinctrl_hsic_active); + ret = PTR_ERR(data->pinctrl_hsic_active); + goto err_put; } } @@ -527,6 +533,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev) if (pdata.flags & CI_HDRC_PMQOS) cpu_latency_qos_remove_request(&data->pm_qos_req); data->ci_pdev = NULL; +err_put: + put_device(data->usbmisc_data->dev); return ret; }