diff options
| author | Suren Baghdasaryan <[email protected]> | 2023-02-27 09:36:17 -0800 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-04-05 20:02:59 -0700 |
| commit | 73046fd00b069ffd198eda099dae966e152fae39 (patch) | |
| tree | 91ca3bca6083ae6ba8762095e11c66072b345886 | |
| parent | d6ac235de4ba6dc659eebb5f4e5ba0a8523d8424 (diff) | |
mm: write-lock VMAs before removing them from VMA tree
Write-locking VMAs before isolating them ensures that page fault handlers
don't operate on isolated VMAs.
[[email protected]: mm/nommu: remove unnecessary VMA locking]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lore.kernel.org/all/Y%2F8CJQGNuMUTdLwP@localhost/
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Suren Baghdasaryan <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
| -rw-r--r-- | mm/mmap.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 8ba51e73f626..83adf86fd62b 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2270,6 +2270,7 @@ int split_vma(struct vma_iterator *vmi, struct vm_area_struct *vma, static inline int munmap_sidetree(struct vm_area_struct *vma, struct ma_state *mas_detach) { + vma_start_write(vma); mas_set_range(mas_detach, vma->vm_start, vma->vm_end - 1); if (mas_store_gfp(mas_detach, vma, GFP_KERNEL)) return -ENOMEM; |