diff options
| -rw-r--r-- | mm/rmap.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index 5ebf16fae4b9..e26ae119a131 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -413,8 +413,15 @@ void unlink_anon_vmas(struct vm_area_struct *vma) list_del(&avc->same_vma); anon_vma_chain_free(avc); } - if (vma->anon_vma) + if (vma->anon_vma) { vma->anon_vma->degree--; + + /* + * vma would still be needed after unlink, and anon_vma will be prepared + * when handle fault. + */ + vma->anon_vma = NULL; + } unlock_anon_vma_root(root); /* |