diff options
| author | David Stevens <stevensd@chromium.org> | 2023-04-18 17:40:31 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-12-12 17:20:19 -0800 |
| commit | 55ac8bbe358bdd2f3c044c12f249fd22d48fe015 (patch) | |
| tree | 9ce5d9290c1f8159bcf17a608afcc7a392f8082d /mm/workingset.c | |
| parent | 43e8832fed08438e2a27afed9bac21acd0ceffe5 (diff) | |
mm/shmem: fix race in shmem_undo_range w/THP
Split folios during the second loop of shmem_undo_range. It's not
sufficient to only split folios when dealing with partial pages, since
it's possible for a THP to be faulted in after that point. Calling
truncate_inode_folio in that situation can result in throwing away data
outside of the range being targeted.
[akpm@linux-foundation.org: tidy up comment layout]
Link: https://lkml.kernel.org/r/20230418084031.3439795-1-stevensd@google.com
Fixes: b9a8a4195c7d ("truncate,shmem: Handle truncates that split large folios")
Signed-off-by: David Stevens <stevensd@chromium.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/workingset.c')
0 files changed, 0 insertions, 0 deletions