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cacaca
2020 Jul 01
0
[PATCH v3 00/34] iommu: Move iommu_group setup to IOMMU core code
...e:
> Looks like this patchset introduced an use-after-free on arm-smmu-v3.
>
> Reproduced using mlx5,
>
> # echo 1 > /sys/class/net/enp11s0f1np1/device/sriov_numvfs
> # echo 0 > /sys/class/net/enp11s0f1np1/device/sriov_numvfs
>
> The .config,
> https://github.com/cailca/linux-mm/blob/master/arm64.config
>
> Looking at the free stack,
>
> iommu_release_device->iommu_group_remove_device
>
> was introduced in 07/34 ("iommu: Add probe_device() and release_device()
> call-backs").
Right, iommu_group_remove_device can tear down the...