diff options
| author | Suren Baghdasaryan <surenb@google.com> | 2023-02-27 18:36:17 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-06 05:02:59 +0200 |
| commit | 73046fd00b069ffd198eda099dae966e152fae39 (patch) | |
| tree | 91ca3bca6083ae6ba8762095e11c66072b345886 /mm/mmap.c | |
| parent | mm/mremap: write-lock VMA while remapping it to a new address range (diff) | |
| download | linux-73046fd00b069ffd198eda099dae966e152fae39.tar.xz linux-73046fd00b069ffd198eda099dae966e152fae39.zip | |
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.
[surenb@google.com: mm/nommu: remove unnecessary VMA locking]
Link: https://lkml.kernel.org/r/20230301190457.1498985-1-surenb@google.com
Link: https://lore.kernel.org/all/Y%2F8CJQGNuMUTdLwP@localhost/
Link: https://lkml.kernel.org/r/20230227173632.3292573-19-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
| -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; |