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| author | Kees Cook <keescook@chromium.org> | 2020-07-04 22:57:33 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-07-10 16:01:52 -0700 |
| commit | 11eb004ef7ead0c43586adea0340b51da095bdee (patch) | |
| tree | 75b81058740a418c30a274c26bf0f485f1de83dd /tools/testing/selftests | |
| parent | adeeec8472397001901c06aa41d1b2fd1068e222 (diff) | |
| download | lwn-11eb004ef7ead0c43586adea0340b51da095bdee.tar.gz lwn-11eb004ef7ead0c43586adea0340b51da095bdee.zip | |
selftests/seccomp: Check ENOSYS under tracing
There should be no difference between -1 and other negative syscalls
while tracing.
Cc: Keno Fischer <keno@juliacomputing.com>
Tested-by: Will Deacon <will@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/seccomp/seccomp_bpf.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c index 462a30e81ca9..13b88d578db6 100644 --- a/tools/testing/selftests/seccomp/seccomp_bpf.c +++ b/tools/testing/selftests/seccomp/seccomp_bpf.c @@ -1942,6 +1942,26 @@ FIXTURE_TEARDOWN(TRACE_syscall) teardown_trace_fixture(_metadata, self->tracer); } +TEST(negative_ENOSYS) +{ + /* + * There should be no difference between an "internal" skip + * and userspace asking for syscall "-1". + */ + errno = 0; + EXPECT_EQ(-1, syscall(-1)); + EXPECT_EQ(errno, ENOSYS); + /* And no difference for "still not valid but not -1". */ + errno = 0; + EXPECT_EQ(-1, syscall(-101)); + EXPECT_EQ(errno, ENOSYS); +} + +TEST_F(TRACE_syscall, negative_ENOSYS) +{ + negative_ENOSYS(_metadata); +} + TEST_F(TRACE_syscall, syscall_allowed) { /* getppid works as expected (no changes). */ |