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-rw-r--r--mm/mprotect.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 8eb7bb4..f7cb3d4 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -160,9 +160,11 @@ static inline unsigned long change_pmd_range(struct vm_area_struct *vma,
}
if (pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) {
- if (next - addr != HPAGE_PMD_SIZE)
+ if (next - addr != HPAGE_PMD_SIZE) {
split_huge_pmd(vma, pmd, addr);
- else {
+ if (pmd_none(*pmd))
+ continue;
+ } else {
int nr_ptes = change_huge_pmd(vma, pmd, addr,
newprot, prot_numa);
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