From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Johan Hovold <johan+linaro@kernel.org>
Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH 1/2] usb: typec: qcom-pmic: fix use-after-free on late probe errors
Date: Mon, 22 Apr 2024 14:13:54 +0300 [thread overview]
Message-ID: <ZiZGciWjmA5SfjUD@kuha.fi.intel.com> (raw)
In-Reply-To: <20240418145730.4605-2-johan+linaro@kernel.org>
On Thu, Apr 18, 2024 at 04:57:29PM +0200, Johan Hovold wrote:
> Make sure to stop and deregister the port in case of late probe errors
> to avoid use-after-free issues when the underlying memory is released by
> devres.
>
> Fixes: a4422ff22142 ("usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
> Cc: stable@vger.kernel.org # 6.5
> Cc: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> ---
> drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
> index e48412cdcb0f..d3958c061a97 100644
> --- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
> +++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c
> @@ -104,14 +104,18 @@ static int qcom_pmic_typec_probe(struct platform_device *pdev)
>
> ret = tcpm->port_start(tcpm, tcpm->tcpm_port);
> if (ret)
> - goto fwnode_remove;
> + goto port_unregister;
>
> ret = tcpm->pdphy_start(tcpm, tcpm->tcpm_port);
> if (ret)
> - goto fwnode_remove;
> + goto port_stop;
>
> return 0;
>
> +port_stop:
> + tcpm->port_stop(tcpm);
> +port_unregister:
> + tcpm_unregister_port(tcpm->tcpm_port);
> fwnode_remove:
> fwnode_remove_software_node(tcpm->tcpc.fwnode);
>
> --
> 2.43.2
--
heikki
next prev parent reply other threads:[~2024-04-22 11:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-18 14:57 [PATCH 0/2] usb: typec: qcom-pmic: fix use-after-free on late probe errors Johan Hovold
2024-04-18 14:57 ` [PATCH 1/2] " Johan Hovold
2024-04-18 17:45 ` Dmitry Baryshkov
2024-04-18 23:41 ` Bryan O'Donoghue
2024-04-22 11:13 ` Heikki Krogerus [this message]
2024-04-18 14:57 ` [PATCH 2/2] usb: typec: qcom-pmic: fix pdphy start() error handling Johan Hovold
2024-04-18 18:00 ` Dmitry Baryshkov
2024-04-18 23:41 ` Bryan O'Donoghue
2024-04-22 11:20 ` Heikki Krogerus
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