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iommufd/selftest: Cover domain unmap with huge pages and access

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Inspired by the syzkaller reproducer check the batch carry path with a
simple test.

Link: https://lore.kernel.org/r/4-v1-ceab6a4d7d7a+94-iommufd_syz_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe
2023-03-31 12:32:27 -03:00
parent 692d42d411
commit 62e37c86bf
1 changed files with 34 additions and 0 deletions
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34
tools/testing/selftests/iommu/iommufd.c
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@@ -594,6 +594,40 @@ TEST_F(iommufd_ioas, iova_ranges)
EXPECT_EQ(0, ranges[1].last); EXPECT_EQ(0, ranges[1].last);
} }
TEST_F(iommufd_ioas, access_domain_destory)
{
struct iommu_test_cmd access_cmd = {
.size = sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .iova = self->base_iova + PAGE_SIZE,
.length = PAGE_SIZE},
};
size_t buf_size = 2 * HUGEPAGE_SIZE;
uint8_t *buf;
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
test_ioctl_ioas_map_fixed(buf, buf_size, self->base_iova);
test_cmd_create_access(self->ioas_id, &access_cmd.id,
MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
access_cmd.access_pages.uptr = (uintptr_t)buf + PAGE_SIZE;
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
/* Causes a complicated unpin across a huge page boundary */
if (self->stdev_id)
test_ioctl_destroy(self->stdev_id);
test_cmd_destroy_access_pages(
access_cmd.id, access_cmd.access_pages.out_access_pages_id);
test_cmd_destroy_access(access_cmd.id);
ASSERT_EQ(0, munmap(buf, buf_size));
}
TEST_F(iommufd_ioas, access_pin) TEST_F(iommufd_ioas, access_pin)
{ {
struct iommu_test_cmd access_cmd = { struct iommu_test_cmd access_cmd = {