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| author | Kirti Wankhede <[email protected]> | 2016-12-06 18:28:12 +0000 |
|---|---|---|
| committer | Alex Williamson <[email protected]> | 2016-12-06 19:35:53 +0000 |
| commit | 2b8bb1d771f736b8b34bf160115aee1b12d29f83 (patch) | |
| tree | 76746b82fb689a2c3c86ce0be03b573f80577359 /drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | |
| parent | vfio iommu type1: Fix size argument to vfio_find_dma() during DMA UNMAP. (diff) | |
| download | kernel-2b8bb1d771f736b8b34bf160115aee1b12d29f83.tar.gz kernel-2b8bb1d771f736b8b34bf160115aee1b12d29f83.zip | |
vfio iommu type1: Fix size argument to vfio_find_dma() in pin_pages/unpin_pages
Passing zero for the size to vfio_find_dma() isn't compatible with
matching the start address of an existing vfio_dma. Doing so triggers a
corner case. In vfio_find_dma(), when the start address is equal to
dma->iova and size is 0, check for the end of search range makes it to
take wrong side of RB-tree. That fails the search even though the address
is present in mapped dma ranges.
In functions pin_pages and unpin_pages, the iova which is being searched
is base address of page to be pinned or unpinned. So here size should be
set to PAGE_SIZE, as argument to vfio_find_dma().
Signed-off-by: Kirti Wankhede <[email protected]>
Signed-off-by: Neo Jia <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c')
0 files changed, 0 insertions, 0 deletions