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Re: [Suit] draft-ietf-suit-trust-domains: proposal of new command sequence

Hannes Tschofenig <hannes.tschofenig@gmx.net> Fri, 22 December 2023 15:48 UTC

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Date: Fri, 22 Dec 2023 16:13:50 +0100
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To: Michael Richardson <mcr+ietf@sandelman.ca>, Brendan Moran <Brendan.Moran@arm.com>, "suit@ietf.org" <suit@ietf.org>
References: <DU0PR05MB1007598D80C708EF5E31D6C1FF196A@DU0PR05MB10075.eurprd05.prod.outlook.com> <DBAPR08MB5576FEBEC9ADFCEFFA5C9F51EA96A@DBAPR08MB5576.eurprd08.prod.outlook.com> <12426.1703256498@localhost>
From: Hannes Tschofenig <hannes.tschofenig@gmx.net>
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Subject: Re: [Suit] draft-ietf-suit-trust-domains: proposal of new command sequence
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Michael,


I guess this should read s/RADIO ROM/RADIO firmware.


Ciao
Hannes


Am 22.12.2023 um 15:48 schrieb Michael Richardson:
> Brendan Moran <Brendan.Moran@arm.com> wrote:
>      > 7. The system does not have enough slots for a rollback in
>      > case of a broken install. ("update procedure crashes in the middle of
>      > ‘suit-install’ sequence executed on another dependency manifest,
>      > leaving the device in incoherent state.")
>
> I think, but I'm not certain, that it does not matter if it has enough slots
> or not, if it doesn't know it should rollback.
>
> The situation I'm thinking about is Android phones that have a RADIO ROM.
> It used to be that upgrading that ROM without also updating the kernel to
> match results in being offline (at best), or crashes (at worst).
>
> So I think that the problem is that the different trust-domains might succeed
> and fail independantly of each other, and that a failure in one implies a
> need to roll-back the other.
>
>
> --
> Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
>             Sandelman Software Works Inc, Ottawa and Worldwide
>
>
>
>
>
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