6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhang Shurong <zhang_shurong@xxxxxxxxxxx> [ Upstream commit 3a23b384e7e3d64d5587ad10729a34d4f761517e ] of_match_device() may fail and returns a NULL pointer. In practice there is no known reasonable way to trigger this, but in case one is added in future, harden the code by adding the check Signed-off-by: Zhang Shurong <zhang_shurong@xxxxxxxxxxx> Link: https://lore.kernel.org/r/tencent_994DA85912C937E3B5405BA960B31ED90A08@xxxxxx Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/iio/adc/stm32-adc-core.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c index 2f082006550fd..bbd5bdd732f01 100644 --- a/drivers/iio/adc/stm32-adc-core.c +++ b/drivers/iio/adc/stm32-adc-core.c @@ -708,6 +708,8 @@ static int stm32_adc_probe(struct platform_device *pdev) struct stm32_adc_priv *priv; struct device *dev = &pdev->dev; struct device_node *np = pdev->dev.of_node; + const struct of_device_id *of_id; + struct resource *res; u32 max_rate; int ret; @@ -720,8 +722,11 @@ static int stm32_adc_probe(struct platform_device *pdev) return -ENOMEM; platform_set_drvdata(pdev, &priv->common); - priv->cfg = (const struct stm32_adc_priv_cfg *) - of_match_device(dev->driver->of_match_table, dev)->data; + of_id = of_match_device(dev->driver->of_match_table, dev); + if (!of_id) + return -ENODEV; + + priv->cfg = (const struct stm32_adc_priv_cfg *)of_id->data; priv->nb_adc_max = priv->cfg->num_adcs; spin_lock_init(&priv->common.lock); -- 2.42.0
