From this webpage screenshot, the following key information about the vulnerability can be obtained: - **Vulnerability Type**: Potential null pointer dereference (null-ptr-deref). - **Affected File**: `drivers/reset/reset-uniphier-glue.c`. - **Fix Description**: When calling `resource_size(res)`, if `platform_get_resource()` returns NULL, it leads to a null pointer dereference. - **Related Commit**: - Fixes the previous commit `499fef0a323 ("reset: uniphier: add USB3 core reset control")`. - Committer: Hui Tang (). - Reviewer: Kunihiko Hayashi (). - **Code Changes**: ```diff @@ -47,7 +47,6 @@ static int uniphier_glue_reset_probe(struct platform_device *pdev) { struct uniphier_glue_reset_priv *priv; struct resource *res; - resource_size_t size; int i, ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); @@ -60,7 +59,6 @@ static int uniphier_glue_reset_probe(struct platform_device *pdev) return -EINVAL; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - size = resource_size(res); priv->rdata.membase = devm_ioremap_resource(dev, res); if (IS_ERR(priv->rdata.membase)) return PTR_ERR(priv->rdata.membase); @@ -96,7 +95,7 @@ static int uniphier_glue_reset_probe(struct platform_device *pdev) spin_lock_init(&priv->rdata.lock); priv->rdata.rcdev.owner = THIS_MODULE; - priv->rdata.rcdev.nr_resets = size * BITS_PER_BYTE; + priv->rdata.rcdev.nr_resets = resource_size(res) * BITS_PER_BYTE; priv->rdata.rcdev.ops = &reset_simple_ops; priv->rdata.rcdev.of_node = dev->of_node; priv->rdata.active_low = true; ``` This information indicates that the vulnerability was caused by not properly checking whether the return value of `platform_get_resource()` is NULL before using it to compute resource size, and it has been fixed by modifying the code to avoid direct use of potentially null variables.