When exit_mmap() removes vmas belonging to an exiting task, it does not mark them as detached since they can't be reached by other tasks and they will be freed shortly. Once we introduce vma reuse, all vmas will have to be in detached state before they are freed to ensure vma when reused is in a consistent state. Add missing vma_mark_detached() before freeing the vma. Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> --- Changes since v9 [1]: - Add Reviewed-by, per Lorenzo Stoakes [1] https://lore.kernel.org/all/20250111042604.3230628-6-surenb@xxxxxxxxxx/ mm/vma.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/mm/vma.c b/mm/vma.c index f72b73f57451..a16a83d0253f 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -427,10 +427,12 @@ void remove_vma(struct vm_area_struct *vma, bool unreachable) if (vma->vm_file) fput(vma->vm_file); mpol_put(vma_policy(vma)); - if (unreachable) + if (unreachable) { + vma_mark_detached(vma); __vm_area_free(vma); - else + } else { vm_area_free(vma); + } } /* -- 2.48.1.601.g30ceb7b040-goog
