Messages in this thread |  | | Date | Wed, 5 Sep 2001 14:50:39 +0200 | From | christophe barbé <> | Subject | Re: Linux 2.4.9-ac6 |
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Would it not be possible with your scheme to package a closed source driver in an open source wrapper driver and then defeat your tainting technique.
Is it legally possible to copyright a kind of magic number with a copyright allowing only it's used in open & public source driver ?
Christophe
Le mer, 05 sep 2001 11:57:17, David Schwartz a écrit : > > > >> I think, perhaps, the logic should be that a module > > >> shouldn't taint the kernel if: > > > >> 1) The user built the module from source on that machine, OR > > > >> 2) The module source is freely available without restriction > > > > I just realized two things. One, there's a strong argument > that this > > > should be an AND, not an OR. > > > And as all distributions would fail (1) in initial form, all > > distributions would result in tainted kernels. Is this the > > intent? > > They wouldn't taint because the kernel signature would match the > module > signatures. I provided more detail on one possible way this scheme would > work and it's not quite as simple as the summary above suggests. > > Basically, when you compile (or install) the kernel, a random > 'signature' > goes in. When you compile a module, the signature goes in too. You can > then > compare the module's signature to the kernel's signature to ensure they > were > compiled as a unit. Unfortunately, this doesn't ensure that the user has > the > source. > > I suppose, if the module source were freely available, then '2' > would > apply. If you keep it as an OR, then distributions wouldn't taint out of > the > box unless they included modules whose source distribution was limited. I > think this is what you want. > > DS > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" > in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > -- Christophe Barbé Software Engineer - christophe.barbe@lineo.fr Lineo France - Lineo High Availability Group 42-46, rue Médéric - 92110 Clichy - France phone (33).1.41.40.02.12 - fax (33).1.41.40.02.01 http://www.lineo.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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