In the Linux kernel, the following vulnerability has been resolved: iommu/sprd: Release dma buffer to avoid memory leak When attaching to a domain, the driver would alloc a DMA buffer which is used to store address mapping table, and it need to be released when the IOMMU domain is freed.
https://git.kernel.org/stable/c/d0a917fd5e3b3ed9d9306b4260ba684b982da9f3
https://git.kernel.org/stable/c/9afea57384d4ae7b2034593eac7fa76c7122762a
https://git.kernel.org/stable/c/92c089a931fd3939cd32318cf4f54e69e8f51a19
https://git.kernel.org/stable/c/8745f3592ee4a7b49ede16ddd3f12a41ecaa23c9