From 35355b09de2dbcaa06dde900d9578c330a0d6d3d Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Fri, 29 Jan 2021 09:41:00 -0500 Subject: [PATCH] mm/mmap: Validate code fix Signed-off-by: Liam R. Howlett --- mm/mmap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index c1e68091a05c6..7a79a8b5e3ade 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -298,7 +298,6 @@ out: extern void mt_validate(struct maple_tree *mt); extern void mt_dump(const struct maple_tree *mt); -/* Validate the maple tree */ static void validate_mm(struct mm_struct *mm) { int bug = 0; @@ -306,8 +305,10 @@ static void validate_mm(struct mm_struct *mm) struct vm_area_struct *vma; MA_STATE(mas, &mm->mm_mt, 0, 0); - + mt_validate(&mm->mm_mt); mas_for_each(&mas, vma, ULONG_MAX) { + VM_BUG_ON(mas.index != vma->vm_start); + VM_BUG_ON(mas.last != vma->vm_end - 1); #ifdef CONFIG_DEBUG_VM_RB struct anon_vma *anon_vma = vma->anon_vma; struct anon_vma_chain *avc; @@ -326,6 +327,7 @@ static void validate_mm(struct mm_struct *mm) } VM_BUG_ON_MM(bug, mm); } + #else // !CONFIG_DEBUG_MAPLE_TREE #define validate_mm(mm) do { } while (0) #endif // CONFIG_DEBUG_MAPLE_TREE -- 2.50.1