linux-kernel - Re: [PATCH 1/8] kasan,x86: Frob kasan

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Message-ID: <20190301152305.GJ32494@hirez.programming.kicks-ass.net>
Date:   Fri, 1 Mar 2019 16:23:05 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Julien Thierry <julien.thierry@....com>,
        Will Deacon <will.deacon@....com>,
        Andy Lutomirski <luto@...capital.net>,
        Ingo Molnar <mingo@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        James Morse <james.morse@....com>, valentin.schneider@....com,
        Brian Gerst <brgerst@...il.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Denys Vlasenko <dvlasenk@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: Re: [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception

On Fri, Mar 01, 2019 at 04:06:17PM +0100, Dmitry Vyukov wrote:
> It involves asm, hardware exceptions, UD2 instructions. It also seems
> to use arch-dependent code in arch-independent files: there is no RSI
> on other arches, does this compile on non-x86?

> > +#ifndef kasan_report
> > +#define kasan_report(addr, size, is_write, ip) __kasan_report(addr, size, is_write, ip)
> > +#endif

Should build; but I've not tried yet.

I'll push the lot out to 0day, that'll yell loudly if I messed that up.

But yes, I'll try some annotation, see what that looks like.