On Sun, Jun 02, 2024 at 12:18:19AM +0800, hailong.liu@xxxxxxxx wrote:
> From: "Hailong.Liu" <hailong.liu@xxxxxxxx>
>
> The function xa_for_each() in _vm_unmap_aliases() loops through all
> vbs. However, since commit 062eacf57ad9 ("mm: vmalloc: remove a global
> vmap_blocks xarray") the vb from xarray may not be on the corresponding
> CPU vmap_block_queue. Consequently, purge_fragmented_block() might
> use the wrong vbq->lock to protect the free list, leading to vbq->free
> breakage.
<snip>
Did you forget to cc: the relevant developers for this change?
stable@xxxxxxxxxxxxxxx is not the proper place to do mm development
work.
thanks,
greg k-h
