| Message ID | 20250401104518.25391-1-bsdhenrymartin@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] backlight: pm8941: Add NULL check in exynos_generic_icc_probe() | expand |
On 01/04/2025 12:45, Henry Martin wrote: > devm_kasprintf() returns NULL when memory allocation fails. Currently, > exynos_generic_icc_probe() does not check for this case, which results > in a NULL pointer dereference. > > Add NULL check after devm_kasprintf() to prevent this issue. > > Fixes: 2f95b9d5cf0b ("interconnect: Add generic interconnect driver for Exynos SoCs") > Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com> > --- Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Best regards, Krzysztof
diff --git a/drivers/interconnect/samsung/exynos.c b/drivers/interconnect/samsung/exynos.c index 9e041365d909..57e779b3e942 100644 --- a/drivers/interconnect/samsung/exynos.c +++ b/drivers/interconnect/samsung/exynos.c @@ -134,6 +134,10 @@ static int exynos_generic_icc_probe(struct platform_device *pdev) priv->node = icc_node; icc_node->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%pOFn", bus_dev->of_node); + if (!icc_node->name) { + ret = -ENOMEM; + goto err_node_del; + } if (of_property_read_u32(bus_dev->of_node, "samsung,data-clock-ratio", &priv->bus_clk_ratio)) priv->bus_clk_ratio = EXYNOS_ICC_DEFAULT_BUS_CLK_RATIO;
devm_kasprintf() returns NULL when memory allocation fails. Currently, exynos_generic_icc_probe() does not check for this case, which results in a NULL pointer dereference. Add NULL check after devm_kasprintf() to prevent this issue. Fixes: 2f95b9d5cf0b ("interconnect: Add generic interconnect driver for Exynos SoCs") Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com> --- V1 -> V2: The fix ensures icc_node cleanup on devm_kasprintf() failure without restructuring the proven error handling workflow. drivers/interconnect/samsung/exynos.c | 4 ++++ 1 file changed, 4 insertions(+)