Re: [PATCH 5.10 0/5] aio poll fixes for 5.10

Greg KH
2021-12-13T08:14:21Z

On Sun, Dec 12, 2021 at 11:46:03AM -0800, Eric Biggers wrote:
> On Sun, Dec 12, 2021 at 02:54:45PM +0100, Greg KH wrote:
> > On Fri, Dec 10, 2021 at 03:48:00PM -0800, Eric Biggers wrote:
> > > Backport the aio poll fixes to 5.10. This resolves a conflict in
> > > aio_poll_wake() in patch 4. It's a "trivial" conflict, but I'm sending
> > > this to make sure it doesn't get dropped.
> > >
> > > Eric Biggers (5):
> > > wait: add wake_up_pollfree()
> > > binder: use wake_up_pollfree()
> > > signalfd: use wake_up_pollfree()
> > > aio: keep poll requests on waitqueue until completed
> > > aio: fix use-after-free due to missing POLLFREE handling
> > >
> > > drivers/android/binder.c | 21 ++--
> > > fs/aio.c | 184 ++++++++++++++++++++++++++------
> > > fs/signalfd.c | 12 +--
> > > include/linux/wait.h | 26 +++++
> > > include/uapi/asm-generic/poll.h | 2 +-
> > > kernel/sched/wait.c | 7 ++
> > > 6 files changed, 195 insertions(+), 57 deletions(-)
> > >
> > > --
> > > 2.34.1
> > >
> >
> > Thanks for all of the backports, much appreciated and now queued up.
> >
> > greg k-h
>
> Thanks! Can you apply the following commit to 5.15-stable too? I missed that
> it's needed in 5.15:
>
> commit 4b3749865374899e115aa8c48681709b086fe6d3
> Author: Xie Yongji <xieyongji@bytedance.com>
> Date: Mon Sep 13 19:19:28 2021 +0800
>
> aio: Fix incorrect usage of eventfd_signal_allowed()

Now queued up, thanks.

greg k-h