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 kglpYnWU 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Explicitly place a prior VMA that would otherwise fail this test if the mode were not enabled (as it would traverse to the previous-previous VMA). Signed-off-by: Lorenzo Stoakes --- tools/testing/vma/vma.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) -- 2.46.2 diff --git a/tools/testing/vma/vma.c b/tools/testing/vma/vma.c index c53f220eb6cc..b33b47342d41 100644 --- a/tools/testing/vma/vma.c +++ b/tools/testing/vma/vma.c @@ -1522,6 +1522,45 @@ static bool test_copy_vma(void) return true; } +static bool test_expand_only_mode(void) +{ + unsigned long flags = VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE; + struct mm_struct mm = {}; + VMA_ITERATOR(vmi, &mm, 0); + struct vm_area_struct *vma_prev, *vma; + VMG_STATE(vmg, &mm, &vmi, 0x5000, 0x9000, flags, 5); + + /* + * Place a VMA prior to the one we're expanding so we assert that we do + * not erroneously try to traverse to the previous VMA even though we + * have, through the use of VMG_FLAG_JUST_EXPAND, indicated we do not + * need to do so. + */ + alloc_and_link_vma(&mm, 0, 0x2000, 0, flags); + + /* + * We will be positioned at the prev VMA, but looking to expand to + * 0x9000. + */ + vma_iter_set(&vmi, 0x3000); + vma_prev = alloc_and_link_vma(&mm, 0x3000, 0x5000, 3, flags); + vmg.prev = vma_prev; + vmg.merge_flags = VMG_FLAG_JUST_EXPAND; + + vma = vma_merge_new_range(&vmg); + ASSERT_NE(vma, NULL); + ASSERT_EQ(vma, vma_prev); + ASSERT_EQ(vmg.state, VMA_MERGE_SUCCESS); + ASSERT_EQ(vma->vm_start, 0x3000); + ASSERT_EQ(vma->vm_end, 0x9000); + ASSERT_EQ(vma->vm_pgoff, 3); + ASSERT_TRUE(vma_write_started(vma)); + ASSERT_EQ(vma_iter_addr(&vmi), 0x3000); + + cleanup_mm(&mm, &vmi); + return true; +} + int main(void) { int num_tests = 0, num_fail = 0; @@ -1553,6 +1592,7 @@ int main(void) TEST(vmi_prealloc_fail); TEST(merge_extend); TEST(copy_vma); + TEST(expand_only_mode); #undef TEST