X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fmemory.c;h=793fe0f9841c09ce87b1d0e0a43f1b416ead6390;hb=72ec94560d7ee1d3a61d5904fd9a5bf68bf3b11a;hp=83be99d9d8a15006e2cb267a3dd46e10e470f66e;hpb=84e39eeb08c0ea7e9ec43ac820bf76a6fe8ecbad;p=cascardo%2Flinux.git

diff --git a/mm/memory.c b/mm/memory.c
index 83be99d9d8a1..793fe0f9841c 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3351,9 +3351,6 @@ static int do_numa_page(struct fault_env *fe, pte_t pte)
 	bool was_writable = pte_write(pte);
 	int flags = 0;
 
-	/* A PROT_NONE fault should not end up here */
-	BUG_ON(!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)));
-
 	/*
 	* The "pte" at this point cannot be used safely without
 	* validation through pte_unmap_same(). It's of NUMA type but
@@ -3458,6 +3455,11 @@ static int wp_huge_pmd(struct fault_env *fe, pmd_t orig_pmd)
 	return VM_FAULT_FALLBACK;
 }
 
+static inline bool vma_is_accessible(struct vm_area_struct *vma)
+{
+	return vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE);
+}
+
 /*
  * These routines also need to handle stuff like marking pages dirty
  * and/or accessed for architectures that don't do it in hardware (most
@@ -3524,7 +3526,7 @@ static int handle_pte_fault(struct fault_env *fe)
 	if (!pte_present(entry))
 		return do_swap_page(fe, entry);
 
-	if (pte_protnone(entry))
+	if (pte_protnone(entry) && vma_is_accessible(fe->vma))
 		return do_numa_page(fe, entry);
 
 	fe->ptl = pte_lockptr(fe->vma->vm_mm, fe->pmd);
@@ -3590,7 +3592,7 @@ static int __handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
 
 		barrier();
 		if (pmd_trans_huge(orig_pmd) || pmd_devmap(orig_pmd)) {
-			if (pmd_protnone(orig_pmd))
+			if (pmd_protnone(orig_pmd) && vma_is_accessible(vma))
 				return do_huge_pmd_numa_page(&fe, orig_pmd);
 
 			if ((fe.flags & FAULT_FLAG_WRITE) &&