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From: Jason Gunthorpe <jgg@nvidia.com>
To: <m.malygin@yadro.com>
Cc: <linux-rdma@vger.kernel.org>, <linux@yadro.com>,
	Sergey Kojushev <s.kojushev@yadro.com>
Subject: Re: [PATCH v2] rdma_rxe: Prevent access to wr->next ptr afrer wr is posted to send queue
Date: Thu, 16 Jul 2020 16:17:12 -0300	[thread overview]
Message-ID: <20200716191712.GA2687753@nvidia.com> (raw)
In-Reply-To: <20200716190340.23453-1-m.malygin@yadro.com>

On Thu, Jul 16, 2020 at 10:03:41PM +0300, m.malygin@yadro.com wrote:
> From: Mikhail Malygin <m.malygin@yadro.com>
> 
> rxe_post_send_kernel() iterates over linked list of wr's, until the wr->next ptr is NULL.
> However it we've got an interrupt after last wr is posted, control may be returned
> to the code after send completion callback is executed and wr memory is freed.
> As a result, wr->next pointer may contain incorrect value leading to panic.
> 
> Signed-off-by: Mikhail Malygin <m.malygin@yadro.com>
> Signed-off-by: Sergey Kojushev <s.kojushev@yadro.com>
> ---
>  drivers/infiniband/sw/rxe/rxe_verbs.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Applied to for-next, thanks

Jason

      reply	other threads:[~2020-07-16 19:17 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-09 12:54 [PATCH] rdma_rxe: Prevent access to wr->next ptr afrer wr is posted to send queue m.malygin
2020-07-14 19:59 ` Jason Gunthorpe
2020-07-16 19:03 ` [PATCH v2] " m.malygin
2020-07-16 19:17   ` Jason Gunthorpe [this message]

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