linux-kernel - Re: [PATCH] selftests/exec: Remove pipe from TEST_GEN

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Message-ID: <202201270844.660E5394C@keescook>
Date:   Thu, 27 Jan 2022 08:45:40 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc:     Eric Biederman <ebiederm@...ssion.com>,
        Shuah Khan <shuah@...nel.org>, kernel@...labora.com,
        Shuah Khan <skhan@...uxfoundation.org>,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests/exec: Remove pipe from TEST_GEN_FILES

On Thu, Jan 27, 2022 at 09:33:45PM +0500, Muhammad Usama Anjum wrote:
> pipe named FIFO special file is being created in execveat.c to perform
> some tests. Makefile doesn't need to do anything with the pipe. When it
> isn't found, Makefile generates the following build error:
> 
> make: *** No rule to make target '/linux_mainline/tools/testing/selftests/exec/pipe', needed by 'all'.  Stop.

Ah, good catch. However, I think this should be moved to EXTRA_CLEAN instead of
only removed from TEST_GEN_FILES. (i.e. "pipe" is created by
tools/testing/selftests/exec/execveat.c and should be removed.

-Kees

> 
> Fixes: 61016db15b8e ("selftests/exec: Verify execve of non-regular files fail")
> Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
> ---
>  tools/testing/selftests/exec/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile
> index dd61118df66ed..12c5e27d32c16 100644
> --- a/tools/testing/selftests/exec/Makefile
> +++ b/tools/testing/selftests/exec/Makefile
> @@ -5,7 +5,7 @@ CFLAGS += -D_GNU_SOURCE
>  
>  TEST_PROGS := binfmt_script non-regular
>  TEST_GEN_PROGS := execveat load_address_4096 load_address_2097152 load_address_16777216
> -TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir pipe
> +TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir
>  # Makefile is a run-time dependency, since it's accessed by the execveat test
>  TEST_FILES := Makefile
>  
> -- 
> 2.30.2
> 

-- 
Kees Cook