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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-14 09:10:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-14 09:10:54 -0700 |
| commit | e70b911acc1687100c31e550251715dbdac96a12 (patch) | |
| tree | 9705f1140d063393a06569fb8d99ddaa578bdcf7 /drivers | |
| parent | 2558258d78873998b8cd81ce7661dc68541b8b51 (diff) | |
| parent | 909290786ea335366e21d7f1ed5812b90f2f0a92 (diff) | |
Merge tag 'vfio-v5.12-rc8' of git://github.com/awilliam/linux-vfio
Pull VFIO fix from Alex Williamson:
"Verify mmap region within range (Christian A. Ehrhardt)"
* tag 'vfio-v5.12-rc8' of git://github.com/awilliam/linux-vfio:
vfio/pci: Add missing range check in vfio_pci_mmap
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 65e7e6b44578..5023e23db3bc 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -1656,6 +1656,8 @@ static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); + if (index >= VFIO_PCI_NUM_REGIONS + vdev->num_regions) + return -EINVAL; if (vma->vm_end < vma->vm_start) return -EINVAL; if ((vma->vm_flags & VM_SHARED) == 0) @@ -1664,7 +1666,7 @@ static int vfio_pci_mmap(void *device_data, struct vm_area_struct *vma) int regnum = index - VFIO_PCI_NUM_REGIONS; struct vfio_pci_region *region = vdev->region + regnum; - if (region && region->ops && region->ops->mmap && + if (region->ops && region->ops->mmap && (region->flags & VFIO_REGION_INFO_FLAG_MMAP)) return region->ops->mmap(vdev, region, vma); return -EINVAL; |