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Date: Tue, 23 Oct 2012 08:45:24 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Kees Cook <keescook@...omium.org> CC: Lucas De Marchi <lucas.demarchi@...fusion.mobi>, Rusty Russell <rusty@...tcorp.com.au>, mtk.manpages@...il.com, linux-kernel@...r.kernel.org, jonathon@...masters.org Subject: Re: [PATCH 1/4] module: add syscall to load module from fd On 10/23/2012 08:42 AM, Kees Cook wrote: > > Hm, yeah, userspace mangling of a module plus signing would fail. > Seems like mangling and signing aren't compatible. Doing it in > kernel-space (as now written for finit_module) solves that, but it > means that now compression isn't possible if you need both signing and > mangling. > > I'm not a user of signing, compression, or mangling, so I'm probably a > bit unimaginative here. It seems like the case for needing all three > is pretty uncommon. (e.g. if you're doing compression, you're probably > building embedded images, which means you're unlikely to need > --force.) > In particular, mangling and signing aren't compatible... however, signing and compression should be just fine (sign before compression). -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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