Description

In the Linux kernel, the following vulnerability has been resolved: iommufd: Make sure to zero vfio_iommu_type1_info before copying to user Missed a zero initialization here. Most of the struct is filled with a copy_from_user(), however minsz for that copy is smaller than the actual struct by 8 bytes, thus we don't fill the padding.

References 2

• git.kernel.org https://git.kernel.org/stable/c/7adcec686e4d699c169d34c722132b2bce5232cb
• git.kernel.org https://git.kernel.org/stable/c/b3551ead616318ea155558cdbe7e91495b8d9b33

Remediation