diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/memory.c b/mm/memory.c index 4cf7d4b6c950..1c6027adc542 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3043,7 +3043,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf) pte_t entry; VM_BUG_ON(!(vmf->flags & FAULT_FLAG_WRITE)); - VM_BUG_ON(PageAnon(page) && !PageAnonExclusive(page)); + VM_BUG_ON(page && PageAnon(page) && !PageAnonExclusive(page)); /* * Clear the pages cpupid information as the existing @@ -4369,9 +4369,12 @@ vm_fault_t finish_fault(struct vm_fault *vmf) return VM_FAULT_OOM; } - /* See comment in handle_pte_fault() */ + /* + * See comment in handle_pte_fault() for how this scenario happens, we + * need to return NOPAGE so that we drop this page. + */ if (pmd_devmap_trans_unstable(vmf->pmd)) - return 0; + return VM_FAULT_NOPAGE; vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd, vmf->address, &vmf->ptl); |