Re: [PATCH 1/2] usb: typec: qcom-pmic: fix use-after-free on late probe errors

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On 18/04/2024 15:57, 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@xxxxxxxxxxxxxxx	# 6.5
Cc: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
---
  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);

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>




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