linux-kernel - Re: [PATCH 4/7] arch: Make ARCH_STACKWALK independent of STACKTRACE

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Message-ID: <20211022163604.GD174703@worktop.programming.kicks-ass.net>
Date:   Fri, 22 Oct 2021 18:36:04 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        juri.lelli@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, akpm@...ux-foundation.org,
        mark.rutland@....com, zhengqi.arch@...edance.com,
        linux@...linux.org.uk, catalin.marinas@....com, will@...nel.org,
        mpe@...erman.id.au, paul.walmsley@...ive.com, palmer@...belt.com,
        hca@...ux.ibm.com, gor@...ux.ibm.com, borntraeger@...ibm.com,
        linux-arch@...r.kernel.org, ardb@...nel.org
Subject: Re: [PATCH 4/7] arch: Make ARCH_STACKWALK independent of STACKTRACE

On Fri, Oct 22, 2021 at 09:18:05AM -0700, Kees Cook wrote:
> On Fri, Oct 22, 2021 at 05:09:37PM +0200, Peter Zijlstra wrote:
> > Make arch_stack_walk() available for ARCH_STACKWALK architectures
> > without it being entangled in STACKTRACE.
> 
> Which CONFIG/arch combos did you build test with this? It looks good,
> but I always expect things like this to end up landing in corner cases.
> :)

I had this one through 0day last night. That's no guarantees, but at
least it's had a handfull of builds done on it.