linux-kernel - Re: [PATCH] selftests: seccomp: fix compile error seccomp

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Date:   Wed, 10 Jan 2018 10:04:59 -0700
From:   Shuah Khan <shuah@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Will Drewry <wad@...omium.org>,
        Andy Lutomirski <luto@...capital.net>,
        Shuah Khan <shuahkh@....samsung.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH] selftests: seccomp: fix compile error seccomp_bpf

On 01/09/2018 04:46 PM, Kees Cook wrote:
> On Tue, Jan 9, 2018 at 3:37 PM, Shuah Khan <shuah@...nel.org> wrote:
>> On 01/09/2018 04:25 PM, Kees Cook wrote:
>>> On Tue, Jan 9, 2018 at 3:24 PM, Kees Cook <keescook@...omium.org> wrote:
>>>> On Tue, Jan 9, 2018 at 3:07 PM, Kees Cook <keescook@...omium.org> wrote:
>>>>> On Fri, Jan 5, 2018 at 6:29 PM, Naresh Kamboju
>>>>> <naresh.kamboju@...aro.org> wrote:
>>>>>> On 5 January 2018 at 22:01, Anders Roxell <anders.roxell@...aro.org> wrote:
>>>>>>> aarch64-linux-gnu-gcc -Wl,-no-as-needed -Wall
>>>>>>>     -lpthread seccomp_bpf.c -o seccomp_bpf
>>>>>>> seccomp_bpf.c: In function 'tracer_ptrace':
>>>>>>> seccomp_bpf.c:1720:12: error: '__NR_open' undeclared
>>>>>>>     (first use in this function)
>>>>>>>   if (nr == __NR_open)
>>>>>>>             ^~~~~~~~~
>>>>>>> seccomp_bpf.c:1720:12: note: each undeclared identifier is reported
>>>>>>>     only once for each function it appears in
>>>>>>> In file included from seccomp_bpf.c:48:0:
>>>>>>> seccomp_bpf.c: In function 'TRACE_syscall_ptrace_syscall_dropped':
>>>>>>> seccomp_bpf.c:1795:39: error: '__NR_open' undeclared
>>>>>>>     (first use in this function)
>>>>>>>   EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_open));
>>>>>>>                                        ^
>>>>>>> open(2) is a legacy syscall, replaced with openat(2) since 2.6.16.
>>>>>>> Thus new architectures in the kernel, such as arm64, don't implement
>>>>>>> these legacy syscalls.
>>>>>>>
>>>>>>> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
>>>>>>
>>>>>> Thanks for the patch Anders.
>>>>>> Tested-by: Naresh Kamboju <naresh.kamboju@...aro.org>
>>>>>
>>>>> Did something change recently? This has built fine on arm64 for a
>>>>> while -- at least since commit 256d0afb11d6 ("selftests/seccomp: build
>>>>> and pass on arm64").
>>>>
>>>> Ah, found it. I broke it in a33b2d0359a0! :) Shuah, can you take this
>>>> please, with this tag added:
>>>>
>>>> Fixes: a33b2d0359a0 ("selftests/seccomp: Add tests for basic ptrace actions")
>>>
>>> And Cc to stable, as this was broken in 4.14...
>>>
>>> Cc: stable@...r.kernel.org
>>>
>>> -Kees
>>>
>>
>> Thanks Kees. Yes I will get this into 4.16-rc1. Okay to add your
>> Acked-by I assume.
> 
> Yes, thanks! Here it is all together:
> 
> Fixes: a33b2d0359a0 ("selftests/seccomp: Add tests for basic ptrace actions")
> Cc: stable@...r.kernel.org
> Acked-by: Kees Cook <keescook@...omium.org>
> 
> 
> -Kees
> 

Applied to linux-kselftest next for 4.16-rc1

thanks,
-- Shuah