On Tue, 7 Apr 2020 21:40:08 -0400 Peter Xu <peterx@xxxxxxxxxx> 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@xxxxxxxxxx/ > > WARNING: bad unlock balance in __get_user_pages_remote > https://lore.kernel.org/lkml/00000000000005c65d05a2b90e70@xxxxxxxxxx/ (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.