iommu：在 iommu_sva_bind_device() 中返回正确的值（CVE-2024-40945）
CVE编号
CVE-2024-40945利用情况
暂无补丁情况
N/A披露时间
2024-07-12漏洞描述
In the Linux kernel, the following vulnerability has been resolved: iommu: Return right value in iommu_sva_bind_device() iommu_sva_bind_device() should return either a sva bond handle or an ERR_PTR value in error cases. Existing drivers (idxd and uacce) only check the return value with IS_ERR(). This could potentially lead to a kernel NULL pointer dereference issue if the function returns NULL instead of an error pointer. In reality, this doesn't cause any problems because iommu_sva_bind_device() only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA. In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will return an error, and the device drivers won't call iommu_sva_bind_device() at all.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。- 攻击路径 N/A
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| CWE-ID | 漏洞类型 |
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