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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-01-27 21:39:17 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-01-27 21:39:17 +0300 |
| commit | 1f97d9dcf53649c41c33227b345a36902cbb08ad (patch) | |
| tree | b70ddd97dd8b36fdc146e8c148ff3464bbdb5b66 | |
| parent | fcb70a56f4d81450114034b2c61f48ce7444a0e2 (diff) | |
| parent | 61ceaf236115f20f4fdd7cf60f883ada1063349a (diff) | |
| download | linux-1f97d9dcf53649c41c33227b345a36902cbb08ad.tar.xz | |
Merge tag 'vfio-v6.19-rc8' of https://github.com/awilliam/linux-vfio
Pull VFIO fix from Alex Williamson:
- Fix a gap in the initial VFIO DMABUF implementation where it's
required to explicitly implement a failing pin callback to prevent
pinned importers that cannot properly support move_notify.
(Leon Romanovsky)
* tag 'vfio-v6.19-rc8' of https://github.com/awilliam/linux-vfio:
vfio: Prevent from pinned DMABUF importers to attach to VFIO DMABUF
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_dmabuf.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/vfio/pci/vfio_pci_dmabuf.c b/drivers/vfio/pci/vfio_pci_dmabuf.c index d4d0f7d08c53..4be4a85005cb 100644 --- a/drivers/vfio/pci/vfio_pci_dmabuf.c +++ b/drivers/vfio/pci/vfio_pci_dmabuf.c @@ -20,6 +20,16 @@ struct vfio_pci_dma_buf { u8 revoked : 1; }; +static int vfio_pci_dma_buf_pin(struct dma_buf_attachment *attachment) +{ + return -EOPNOTSUPP; +} + +static void vfio_pci_dma_buf_unpin(struct dma_buf_attachment *attachment) +{ + /* Do nothing */ +} + static int vfio_pci_dma_buf_attach(struct dma_buf *dmabuf, struct dma_buf_attachment *attachment) { @@ -76,6 +86,8 @@ static void vfio_pci_dma_buf_release(struct dma_buf *dmabuf) } static const struct dma_buf_ops vfio_pci_dmabuf_ops = { + .pin = vfio_pci_dma_buf_pin, + .unpin = vfio_pci_dma_buf_unpin, .attach = vfio_pci_dma_buf_attach, .map_dma_buf = vfio_pci_dma_buf_map, .unmap_dma_buf = vfio_pci_dma_buf_unmap, |