diff options
| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-06-16 15:58:54 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-24 14:13:54 -0700 |
| commit | f440fa1ac955e2898893f9301568435eb5cdfc4b (patch) | |
| tree | 5acff3435c93fdcb5527124ae4aadfcbd46ab866 /mm/memory.c | |
| parent | 2cd76c50d0b41cec5c87abfcdf25b236a2793fb6 (diff) | |
mm: make find_extend_vma() fail if write lock not held
Make calls to extend_vma() and find_extend_vma() fail if the write lock
is required.
To avoid making this a flag-day event, this still allows the old
read-locking case for the trivial situations, and passes in a flag to
say "is it write-locked". That way write-lockers can say "yes, I'm
being careful", and legacy users will continue to work in all the common
cases until they have been fully converted to the new world order.
Co-Developed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memory.c b/mm/memory.c index 1dff248805bf..a81f5d0997ad 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5368,7 +5368,7 @@ struct vm_area_struct *lock_mm_and_find_vma(struct mm_struct *mm, goto fail; } - if (expand_stack(vma, addr)) + if (expand_stack_locked(vma, addr, true)) goto fail; success: |