[PATCH 4.14 009/167] selftests: seccomp: fix compile error seccomp_bpf

Greg Kroah-Hartman
2018-02-21T12:47:00Z

From: Anders Roxell <anders.roxell@linaro.org>

commit 912ec316686df352028afb6efec59e47a958a24d upstream.

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.

Fixes: a33b2d0359a0 ("selftests/seccomp: Add tests for basic ptrace actions")
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: stable@vger.kernel.org
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
tools/testing/selftests/seccomp/seccomp_bpf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -1717,7 +1717,7 @@ void tracer_ptrace(struct __test_metadat

if (nr == __NR_getpid)
change_syscall(_metadata, tracee, __NR_getppid);
- if (nr == __NR_open)
+ if (nr == __NR_openat)
change_syscall(_metadata, tracee, -1);
}

@@ -1792,7 +1792,7 @@ TEST_F(TRACE_syscall, ptrace_syscall_dro
true);

/* Tracer should skip the open syscall, resulting in EPERM. */
- EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_open));
+ EXPECT_SYSCALL_RETURN(EPERM, syscall(__NR_openat));
}

TEST_F(TRACE_syscall, syscall_allowed)