Re: [PATCH hotfix] mm/compaction: handle free_pages_prepare() properly in compaction_free()

[Johannes Weiner]

On Mon, Jun 22, 2026 at 11:30:42AM -0400, Zi Yan wrote:
> free_pages_prepare() can fail but compaction_free() does not handle the
> failure case. Failed pages should not be added back to cc->freepages for
> future use, since they can be either PageHWPoison or free_page_is_bad()
> and might cause data corruption.
> 
> Fixes: 733aea0b3a7bb ("mm/compaction: add support for >0 order folio memory compaction.")
> Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>