linux-kernel - Re: [PATCH 3/3] selftest/arm64/ptrace: add tests for PTRACE_O_ARM64_RAW

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Date:   Wed, 10 Feb 2021 12:54:57 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Will Deacon <will@...nel.org>
Cc:     Andrei Vagin <avagin@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Oleg Nesterov <oleg@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-api@...r.kernel.org,
        Anthony Steinhauser <asteinhauser@...gle.com>,
        Dave Martin <Dave.Martin@....com>,
        Keno Fischer <keno@...iacomputing.com>
Subject: Re: [PATCH 3/3] selftest/arm64/ptrace: add tests for
 PTRACE_O_ARM64_RAW_REGS

On Thu, Feb 04, 2021 at 03:40:39PM +0000, Will Deacon wrote:
> [+Kees]
> 
> On Mon, Feb 01, 2021 at 11:40:12AM -0800, Andrei Vagin wrote:
> > Test output:
> >  TAP version 13
> >  1..2
> >  # selftests: arm64/ptrace: ptrace_syscall_raw_regs_test
> >  # 1..2
> >  # ok 1 x7: 686920776f726c64
> >  # ok 2 The child exited with code 0.
> >  # # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0
> >  ok 1 selftests: arm64/ptrace: ptrace_syscall_raw_regs_test
> >  # selftests: arm64/ptrace: ptrace_syscall_regs_test
> >  # 1..3
> >  # ok 1 x7: 0
> >  # ok 2 x7: 1
> >  # ok 3 The child exited with code 0.
> >  # # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0
> >  ok 2 selftests: arm64/ptrace: ptrace_syscall_regs_test
> > 
> > Signed-off-by: Andrei Vagin <avagin@...il.com>
> > ---
> >  tools/testing/selftests/arm64/Makefile        |   2 +-
> >  tools/testing/selftests/arm64/ptrace/Makefile |   6 +
> >  .../ptrace/ptrace_syscall_raw_regs_test.c     | 142 +++++++++++++++++
> >  .../arm64/ptrace/ptrace_syscall_regs_test.c   | 150 ++++++++++++++++++
> >  4 files changed, 299 insertions(+), 1 deletion(-)
> >  create mode 100644 tools/testing/selftests/arm64/ptrace/Makefile
> >  create mode 100644 tools/testing/selftests/arm64/ptrace/ptrace_syscall_raw_regs_test.c
> >  create mode 100644 tools/testing/selftests/arm64/ptrace/ptrace_syscall_regs_test.c
> 
> Thanks for the tests!
> 
> We already have a pretty extensive set of syscall entry tests in
> tools/testing/selftests/seccomp, so perhaps this would be better off as part
> of that? Maybe worth a look.

I'm happy with this living in either place -- I can make an argument
either way. If it's arm64-specific, maybe better to live outside of
seccomp?

-- 
Kees Cook