Re: [PATCH] mm: migrate: initialize err in do_migrate_pages

2021-01-05 Thread Yang Shi
On Tue, Jan 5, 2021 at 6:14 AM Jan Stancek wrote: > > After commit 236c32eb1096 ("mm: migrate: clean up migrate_prep{_local}")', > do_migrate_pages can return uninitialized variable 'err' (which is > propagated to user-space as error) when 'from' and 'to' nodesets > are identical. This can be repr

Re: [PATCH] mm: migrate: initialize err in do_migrate_pages

2021-01-05 Thread Michal Hocko
On Tue 05-01-21 15:14:20, Jan Stancek wrote: > After commit 236c32eb1096 ("mm: migrate: clean up migrate_prep{_local}")', > do_migrate_pages can return uninitialized variable 'err' (which is > propagated to user-space as error) when 'from' and 'to' nodesets > are identical. This can be reproduced w

[PATCH] mm: migrate: initialize err in do_migrate_pages

2021-01-05 Thread Jan Stancek
After commit 236c32eb1096 ("mm: migrate: clean up migrate_prep{_local}")', do_migrate_pages can return uninitialized variable 'err' (which is propagated to user-space as error) when 'from' and 'to' nodesets are identical. This can be reproduced with LTP migrate_pages01, which calls migrate_pages()