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Message-ID: <CAGXu5jKbvXdtOQMVV3Jig-cCd=yfMYTF5gZSReAxkEEfs198ow@mail.gmail.com> Date: Fri, 14 Mar 2014 13:15:02 -0700 From: Kees Cook <keescook@...omium.org> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Dave Jones <davej@...hat.com>, Sasha Levin <sasha.levin@...cle.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [RFC] improve_stack: make stack dump output useful again On Fri, Mar 14, 2014 at 12:41 PM, Linus Torvalds <torvalds@...ux-foundation.org> wrote: > On Fri, Mar 14, 2014 at 12:32 PM, Linus Torvalds > <torvalds@...ux-foundation.org> wrote: >> >> Hmm. Do you have CONFIG_KALLSYMS enabled? > > Just to clarify. KALLSYMS is required to figure out the symbol > addresses on a kaslr system. There's no way to look them up in a > System.map file or the object file, since the addresses aren't going > to match. > > Your symptoms really sound like you might not have KALLSYMS enabled. > > I wonder if we have a "select KALLSYMS" as part of RANDOMIZE_BASE, > since you need it for debug messages too (random hex numbers aren't > too useful ;) My weak preference would be to allow to build without that hard requirement (citing imagined space savings, blah blah). But since everything I normally use has KALLSYMS, I wouldn't object to doing it either. :) -Kees -- Kees Cook Chrome OS Security -- 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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