On 10/16/24 2:57 PM, Andrew Morton wrote:
On Wed, 16 Oct 2024 13:22:42 -0700 John Hubbard <jhubbard@xxxxxxxxxx> wrote:
...
Fix this by unpinning the pages that __get_user_pages_locked() has
pinned, in such error cases.
Thanks.
Fixes: 24a95998e9ba ("mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes")
I'll add this to the -stable backport pile, although this seems a bit
marginal?
I'm on the fence about that. It is marginal: you have to
exhaust memory. On the other hand, a real user reported
this bug to us.
I guess I'd lean toward "correctness in -stable", and
add it to the pile, in the end.
thanks,
--
John Hubbard
