5.4-stable review patch. If anyone has any objections, please let me know.
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From: Manivannan Sadhasivam mani@kernel.org
[ Upstream commit c9764fd88bc744592b0604ccb6b6fc1a5f76b4e3 ]
drvdata::gpiods is supposed to hold an array of 'gpio_desc' pointers. But the memory is allocated for only one pointer. This will lead to out-of-bounds access later in the code if 'config::ngpios' is > 1. So fix the code to allocate enough memory to hold 'config::ngpios' of GPIO descriptors.
While at it, also move the check for memory allocation failure to be below the allocation to make it more readable.
Cc: stable@vger.kernel.org # 5.0 Fixes: d6cd33ad7102 ("regulator: gpio: Convert to use descriptors") Signed-off-by: Manivannan Sadhasivam mani@kernel.org Link: https://patch.msgid.link/20250703103549.16558-1-mani@kernel.org Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/regulator/gpio-regulator.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c index e84fc9d724486..50fcb5fce11ac 100644 --- a/drivers/regulator/gpio-regulator.c +++ b/drivers/regulator/gpio-regulator.c @@ -253,8 +253,10 @@ static int gpio_regulator_probe(struct platform_device *pdev) return -ENOMEM; }
- drvdata->gpiods = devm_kzalloc(dev, sizeof(struct gpio_desc *), - GFP_KERNEL); + drvdata->gpiods = devm_kcalloc(dev, config->ngpios, + sizeof(struct gpio_desc *), GFP_KERNEL); + if (!drvdata->gpiods) + return -ENOMEM;
if (config->input_supply) { drvdata->desc.supply_name = devm_kstrdup(&pdev->dev, @@ -267,8 +269,6 @@ static int gpio_regulator_probe(struct platform_device *pdev) } }
- if (!drvdata->gpiods) - return -ENOMEM; for (i = 0; i < config->ngpios; i++) { drvdata->gpiods[i] = devm_gpiod_get_index(dev, NULL,