From: "Alex Shi (tencent)" <alexs@xxxxxxxxxx> We do vma_set_anonyous in do_mmap(), and then vma_is_anonymous() checking workable, use it as a extra check since ksm only care anonymous pages. Signed-off-by: Alex Shi (tencent) <alexs@xxxxxxxxxx> --- mm/ksm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/ksm.c b/mm/ksm.c index f5138f43f0d2..088bce39cd33 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -742,7 +742,8 @@ static struct vm_area_struct *find_mergeable_vma(struct mm_struct *mm, if (ksm_test_exit(mm)) return NULL; vma = vma_lookup(mm, addr); - if (!vma || !(vma->vm_flags & VM_MERGEABLE) || !vma->anon_vma) + if (!vma || !(vma->vm_flags & VM_MERGEABLE) || !vma->anon_vma || + !vma_is_anonymous(vma)) return NULL; return vma; } -- 2.43.0
