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SubjectRE: possible deadlock in cma_netdev_callback
-----"Jason Gunthorpe" <> wrote: -----

>To: "Bernard Metzler" <>
>From: "Jason Gunthorpe" <>
>Date: 02/27/2020 04:53PM
>Cc: "syzbot" <>,
>Subject: [EXTERNAL] Re: possible deadlock in cma_netdev_callback
>On Thu, Feb 27, 2020 at 10:11:13AM +0000, Bernard Metzler wrote:
>> Thanks for letting me know! Hmm, we cannot use RCU locks since
>> we potentially sleep. One solution would be to create a list
>> of matching interfaces while under lock, unlock and use that
>> list for calling siw_listen_address() (which may sleep),
>> right...?
>Why do you need to iterate over addresses anyhow? Shouldn't the
>just be done with the address the user gave and a BIND DEVICE to the
>device siw is connected to?

The user may give a wildcard local address, so we'd have
to bind to all addresses of that device...


>Also that loop in siw_create looks wrong to me

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