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| author | Joao Martins <joao.m.martins@oracle.com> | 2023-10-30 14:34:46 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-10-30 18:03:20 +0300 |
| commit | 2e22aac3ea9cfc0ec3209c96644f60c1806a8117 (patch) | |
| tree | 6eaa4e3592fe393e08d2b2f184e2616f6fc1858e /drivers/iommu/Kconfig | |
| parent | 361d744ddd61de065fbeb042aaed590d32dd92ec (diff) | |
| download | linux-2e22aac3ea9cfc0ec3209c96644f60c1806a8117.tar.xz | |
iommufd/selftest: Fix page-size check in iommufd_test_dirty()
iommufd_test_dirty()/IOMMU_TEST_OP_DIRTY sets the dirty bits in the mock
domain implementation that the userspace side validates against what it
obtains via the UAPI.
However in introducing iommufd_test_dirty() it forgot to validate page_size
being 0 leading to two possible divide-by-zero problems: one at the
beginning when calculating @max and while calculating the IOVA in the
XArray PFN tracking list.
While at it, validate the length to require non-zero value as well, as we
can't be allocating a 0-sized bitmap.
Link: https://lore.kernel.org/r/20231030113446.7056-1-joao.m.martins@oracle.com
Reported-by: syzbot+25dc7383c30ecdc83c38@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-iommu/00000000000005f6aa0608b9220f@google.com/
Fixes: a9af47e382a4 ("iommufd/selftest: Test IOMMU_HWPT_GET_DIRTY_BITMAP")
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/Kconfig')
0 files changed, 0 insertions, 0 deletions