ptrace_syscall_dropped.c:298:TRACE_syscall.ptrace_syscall_dropped:Expected 1 (1) == syscall(286) (4294967295)

Hi,

On Tue, May 8, 2018 at 4:34 PM, Michael Ellerman [off-list ref] wrote:

Mathieu Malaterre [off-list ref] writes:

quoted

Hi there,

Quick question (I have not investigate root cause): is support for
seccomp complete on ppc32 ?

Doesn't look like it does it :)

quoted

$ make KBUILD_OUTPUT=/tmp/kselftest TARGETS=seccomp kselftest
...
seccomp_bpf.c:1804:TRACE_syscall.ptrace_syscall_dropped:Expected 1 (1)
== syscall(286) (4294967295)
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #13
[     FAIL ] TRACE_syscall.ptrace_syscall_dropped
...
[ RUN      ] global.get_metadata
seccomp_bpf.c:2880:global.get_metadata:Expected 0 (0) == seccomp(1, 2,
&prog) (4294967295)
seccomp_bpf.c:2892:global.get_metadata:Expected 1 (1) ==
read(pipefd[0], &buf, 1) (0)
global.get_metadata: Test terminated by assertion
[     FAIL ] global.get_metadata

I'm not sure sorry.

That could be a test case bug, hard to say without looking at the
details.

I've reduced the test case to the attached file. Does that help, or
should I reduce it some more ?

$ gcc -m32 -o ptrace_syscall_dropped ptrace_syscall_dropped.c

running it as root:

# ./ptrace_syscall_dropped
[==========] Running 1 tests from 1 test cases.
[ RUN      ] TRACE_syscall.ptrace_syscall_dropped
ptrace_syscall_dropped.c:298:TRACE_syscall.ptrace_syscall_dropped:Expected
1 (1) == syscall(286) (4294967295)
TRACE_syscall.ptrace_syscall_dropped: Test failed at step #13
[     FAIL ] TRACE_syscall.ptrace_syscall_dropped
[==========] 0 / 1 tests passed.
[  FAILED  ]


Thanks