linux-kernel - Re: [PATCH v4 2/3][v4.9.y] coredump: fix race condition between mmget_not_zero()/get_task

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Date:   Mon, 24 Jun 2019 13:12:30 +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>,
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        Yishai Hadas <yishaih@...lanox.com>,
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Subject: Re: [PATCH v4 2/3][v4.9.y] coredump: fix race condition between
 mmget_not_zero()/get_task_mm() and core dumping

On Tue, Jun 25, 2019 at 02:33:04AM +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(-)

Looks OK

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

Thanks
Jason