Re: [PATCH 0/2] mm: Two small fixes for recent syzbot reports

Andrew Morton
2020-04-09T00:47:35Z

On Tue, 7 Apr 2020 21:40:08 -0400 Peter Xu <peterx@redhat.com> wrote:

> The two patches should fix below syzbot reports:
>
> BUG: unable to handle kernel paging request in kernel_get_mempolicy
> https://lore.kernel.org/lkml/0000000000002b25f105a2a3434d@google.com/
>
> WARNING: bad unlock balance in __get_user_pages_remote
> https://lore.kernel.org/lkml/00000000000005c65d05a2b90e70@google.com/

(Is there an email address for the syzbot operators?)

sysbot does test linux-next, yet these patches sat in linux-next for a
month without a peep, but all hell broke loose when they hit Linus's
tree. How could this have happened?

Possibly I've been carrying a later patch which fixed all this up, but
I'm not seeing anything like that. Nothing at all against mm/gup.c.