[RESEND PATCH 1/2][SRU][DISCO][EOAN] selftests/seccomp: fix build on older kernels

[Kleber Souza]

On 22.10.19 11:36, Christian Brauner wrote:
> From: Tycho Andersen <tycho at tycho.ws>
> 
> BugLink: https://bugs.launchpad.net/bugs/1849281
> 
> [ Upstream commit 88282297fff00796e81f5e67734a6afdfb31fbc4 ]
> 
> The seccomp selftest goes to some length to build against older kernel
> headers, viz. all the #ifdefs at the beginning of the file.
> 
> Commit 201766a20e30 ("ptrace: add PTRACE_GET_SYSCALL_INFO request")
> introduces some additional macros, but doesn't do the #ifdef dance.
> Let's add that dance here to avoid:
> 
> gcc -Wl,-no-as-needed -Wall  seccomp_bpf.c -lpthread -o seccomp_bpf
> In file included from seccomp_bpf.c:51:
> seccomp_bpf.c: In function ‘tracer_ptrace’:
> seccomp_bpf.c:1787:20: error: ‘PTRACE_EVENTMSG_SYSCALL_ENTRY’ undeclared (first use in this function); did you mean ‘PTRACE_EVENT_CLONE’?
>   EXPECT_EQ(entry ? PTRACE_EVENTMSG_SYSCALL_ENTRY
>                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../kselftest_harness.h:608:13: note: in definition of macro ‘__EXPECT’
>   __typeof__(_expected) __exp = (_expected); \
>              ^~~~~~~~~
> seccomp_bpf.c:1787:2: note: in expansion of macro ‘EXPECT_EQ’
>   EXPECT_EQ(entry ? PTRACE_EVENTMSG_SYSCALL_ENTRY
>   ^~~~~~~~~
> seccomp_bpf.c:1787:20: note: each undeclared identifier is reported only once for each function it appears in
>   EXPECT_EQ(entry ? PTRACE_EVENTMSG_SYSCALL_ENTRY
>                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../kselftest_harness.h:608:13: note: in definition of macro ‘__EXPECT’
>   __typeof__(_expected) __exp = (_expected); \
>              ^~~~~~~~~
> seccomp_bpf.c:1787:2: note: in expansion of macro ‘EXPECT_EQ’
>   EXPECT_EQ(entry ? PTRACE_EVENTMSG_SYSCALL_ENTRY
>   ^~~~~~~~~
> seccomp_bpf.c:1788:6: error: ‘PTRACE_EVENTMSG_SYSCALL_EXIT’ undeclared (first use in this function); did you mean ‘PTRACE_EVENT_EXIT’?
>     : PTRACE_EVENTMSG_SYSCALL_EXIT, msg);
>       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../kselftest_harness.h:608:13: note: in definition of macro ‘__EXPECT’
>   __typeof__(_expected) __exp = (_expected); \
>              ^~~~~~~~~
> seccomp_bpf.c:1787:2: note: in expansion of macro ‘EXPECT_EQ’
>   EXPECT_EQ(entry ? PTRACE_EVENTMSG_SYSCALL_ENTRY
>   ^~~~~~~~~
> make: *** [Makefile:12: seccomp_bpf] Error 1
> 
> [skhan at linuxfoundation.org: Fix checkpatch error in commit log]
> Signed-off-by: Tycho Andersen <tycho at tycho.ws>
> Fixes: 201766a20e30 ("ptrace: add PTRACE_GET_SYSCALL_INFO request")
> Acked-by: Kees Cook <keescook at chromium.org>
> Signed-off-by: Shuah Khan <skhan at linuxfoundation.org>
> Signed-off-by: Christian Brauner <christian.brauner at ubuntu.com>

Hi Christian,

It seems this is a cherry-pick or backport of a patch from one of the stable
upstream branches. In that case, we also need to add the provenance of the patch,
the sha1 from where you are cherry-picking/backport (apart from upstream commit
up there ^).

You don't need to resend the patch, please add the additional information
in a reply email.


Thanks,
Kleber

> ---
>  tools/testing/selftests/seccomp/seccomp_bpf.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
> index 7e448d5b608a..6021baecb386 100644
> --- a/tools/testing/selftests/seccomp/seccomp_bpf.c
> +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
> @@ -204,6 +204,11 @@ struct seccomp_notif_sizes {
>  };
>  #endif
>  
> +#ifndef PTRACE_EVENTMSG_SYSCALL_ENTRY
> +#define PTRACE_EVENTMSG_SYSCALL_ENTRY	1
> +#define PTRACE_EVENTMSG_SYSCALL_EXIT	2
> +#endif
> +
>  #ifndef seccomp
>  int seccomp(unsigned int op, unsigned int flags, void *args)
>  {
>