Re: [PATCH v4 0/3] [v4.9.y] coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping

[Sasha Levin]

On Tue, Jun 25, 2019 at 02:33:06AM +0530, Ajay Kaher wrote:
> coredump: fix race condition between mmget_not_zero()/get_task_mm()
> and core dumping
>
> [PATCH v4 1/3]:
> Backporting of commit 04f5866e41fb70690e28397487d8bd8eea7d712a upstream.
>
> [PATCH v4 2/3]:
> Extension of commit 04f5866e41fb to fix the race condition between
> get_task_mm() and core dumping for IB->mlx4 and IB->mlx5 drivers.
>
> [PATCH v4 3/3]
> Backporting of commit 59ea6d06cfa9247b586a695c21f94afa7183af74 upstream.
>
> [diff from v3]:
> - added [PATCH v4 3/3]

Why do all the patches have the same subject line?

I guess it's correct for the first one, but can you explain what's up
with #2 and #3?

If the second one isn't upstream, please explain in detail why not and
how 4.9 differs from upstream so that it requires a custom backport.

The third one just looks like a different patch altogether with a wrong
subject line?

--
Thanks,
Sasha