CWE
476
Advisory Published
CVE Published
Updated

CVE-2024-40945: iommu: Return right value in iommu_sva_bind_device()

First published: Fri Jul 12 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
redhat/kernel<5.4.279
5.4.279
redhat/kernel<5.10.221
5.10.221
redhat/kernel<5.15.162
5.15.162
redhat/kernel<6.6.35
6.6.35
redhat/kernel<6.9.6
6.9.6
redhat/kernel<6.10
6.10
debian/linux<=6.1.115-1<=6.1.119-1
5.10.223-1
5.10.226-1
6.12.6-1

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