linux-kernel - Re: [PATCH v3 7/7] selftests/exec: Add READ_IMPLIES

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Date:   Tue, 11 Feb 2020 11:25:46 -0800
From:   Kees Cook <keescook@...omium.org>
To:     shuah <shuah@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Hector Marco-Gisbert <hecmargi@....es>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Jann Horn <jannh@...gle.com>,
        Russell King <linux@...linux.org.uk>, x86@...nel.org,
        kernel-hardening@...ts.openwall.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v3 7/7] selftests/exec: Add READ_IMPLIES_EXEC tests

On Tue, Feb 11, 2020 at 11:11:21AM -0700, shuah wrote:
> On 2/10/20 12:30 PM, Kees Cook wrote:
> > In order to check the matrix of possible states for handling
> > READ_IMPLIES_EXEC across native, compat, and the state of PT_GNU_STACK,
> > add tests for these execution conditions.
> > 
> > Signed-off-by: Kees Cook <keescook@...omium.org>
> 
> No issues for this to go through tip.
> 
> A few problems to fix first. This fails to compile when 32-bit libraries
> aren't installed. It should fail the 32-bit part and run other checks.

Do you mean the Makefile should detect the missing compat build deps and
avoid building them? Testing compat is pretty important to this test, so
it seems like missing the build deps causing the build to fail is the
correct action here. This is likely true for the x86/ selftests too.

What would you like this to do?

-- 
Kees Cook