1 files changed, 8 insertions, 0 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 999fb0aef8f1..9cc773483624 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3202,6 +3202,14 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 			continue;
 
 		/*
+		 * Shared VMAs have their own reserves and do not affect
+		 * MAP_PRIVATE accounting but it is possible that a shared
+		 * VMA is using the same page so check and skip such VMAs.
+		 */
+		if (iter_vma->vm_flags & VM_MAYSHARE)
+			continue;
+
+		/*
 		 * Unmap the page from other VMAs without their own reserves.
 		 * They get marked to be SIGKILLed if they fault in these
 		 * areas. This is because a future no-page fault on this VMA