linux-kernel - Re: [PATCH v2] RDMA/cma: Rollback source IP address if failing to acquire device

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Date:   Mon, 14 Jan 2019 15:28:52 -0700
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Myungho Jung <mhjungk@...il.com>
Cc:     Doug Ledford <dledford@...hat.com>,
        Parav Pandit <parav@...lanox.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] RDMA/cma: Rollback source IP address if failing to
 acquire device

On Wed, Jan 09, 2019 at 10:27:31PM -0800, Myungho Jung wrote:
> If cma_acquire_dev_by_src_ip() returns error in addr_handler(), the
> device state changes back to RDMA_CM_ADDR_BOUND but the resolved source
> IP address is still left. After that, if rdma_destroy_id() is called
> after rdma_listen(), the device is freed without removed from
> listen_any_list in cma_cancel_operation(). Revert to the previous IP
> address if acquiring device fails.
> 
> Reported-by: syzbot+f3ce716af730c8f96637@...kaller.appspotmail.com
> Signed-off-by: Myungho Jung <mhjungk@...il.com>
> Reviewed-by: Parav Pandit <parav@...lanox.com>
> ---
>  drivers/infiniband/core/cma.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)

Applied to for-next, thanks

Jason