linux-kernel - Re: [PATCH] [v4.14.y] infiniband: fix race condition between infiniband mlx4, mlx5 driver and core dumping

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Message-ID: <20190610160521.GJ18446@mellanox.com>
Date:   Mon, 10 Jun 2019 16:05:27 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Ajay Kaher <akaher@...are.com>
CC:     "aarcange@...hat.com" <aarcange@...hat.com>,
        "jannh@...gle.com" <jannh@...gle.com>,
        "oleg@...hat.com" <oleg@...hat.com>,
        "peterx@...hat.com" <peterx@...hat.com>,
        "rppt@...ux.ibm.com" <rppt@...ux.ibm.com>,
        "mhocko@...e.com" <mhocko@...e.com>,
        Yishai Hadas <yishaih@...lanox.com>,
        "dledford@...hat.com" <dledford@...hat.com>,
        "sean.hefty@...el.com" <sean.hefty@...el.com>,
        "hal.rosenstock@...il.com" <hal.rosenstock@...il.com>,
        Matan Barak <matanb@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "srivatsab@...are.com" <srivatsab@...are.com>,
        "amakhalov@...are.com" <amakhalov@...are.com>
Subject: Re: [PATCH] [v4.14.y] infiniband: fix race condition between
 infiniband mlx4, mlx5  driver and core dumping

On Tue, Jun 11, 2019 at 02:22:17AM +0530, Ajay Kaher wrote:
> This patch is the extension of following upstream commit to fix
> the race condition between get_task_mm() and core dumping
> for IB->mlx4 and IB->mlx5 drivers:
> 
> commit 04f5866e41fb ("coredump: fix race condition between
> mmget_not_zero()/get_task_mm() and core dumping")'
> 
> Thanks to Jason for pointing this.
> 
> Signed-off-by: Ajay Kaher <akaher@...are.com>
> ---
>  drivers/infiniband/hw/mlx4/main.c | 4 +++-
>  drivers/infiniband/hw/mlx5/main.c | 3 +++
>  2 files changed, 6 insertions(+), 1 deletion(-)

Acked-by: Jason Gunthorpe <jgg@...lanox.com>

Jason