Re: [PATCH 00/15] selftests/seccomp: Refactor change_syscall()

Max Filippov
2020-09-15T08:45:47Z

Hello,

On Sat, Sep 12, 2020 at 4:08 AM Kees Cook <keescook@chromium.org> wrote:
> This refactors the seccomp selftest macros used in change_syscall(),
> in an effort to remove special cases for mips, arm, arm64, and xtensa,
> which paves the way for powerpc fixes.
>
> I'm not entirely done testing, but all-arch build tests and x86_64
> selftests pass. I'll be doing arm, arm64, and i386 selftests shortly,
> but I currently don't have an easy way to check xtensa, mips, nor
> powerpc. Any help there would be appreciated!

I've built and tested this series on xtensa. I had to disable two tests:
user_notification_addfd and user_notification_addfd_rlimit because
they use memfd_create and prlimit which are not available in uClibc.
With this change I've got all 86 tests passing with the following log:

./seccomp_bpf
TAP version 13
1..86
# Starting 86 tests from 7 test cases.
# RUN TRAP.dfl ...
# OK TRAP.dfl
ok 1 TRAP.dfl
# RUN TRAP.ign ...
# OK TRAP.ign
ok 2 TRAP.ign
# RUN TRAP.handler ...
# OK TRAP.handler
ok 3 TRAP.handler
# RUN precedence.allow_ok ...
# OK precedence.allow_ok
ok 4 precedence.allow_ok
# RUN precedence.kill_is_highest ...
# OK precedence.kill_is_highest
ok 5 precedence.kill_is_highest
# RUN precedence.kill_is_highest_in_any_order ...
# OK precedence.kill_is_highest_in_any_order
ok 6 precedence.kill_is_highest_in_any_order
# RUN precedence.trap_is_second ...
# OK precedence.trap_is_second
ok 7 precedence.trap_is_second
# RUN precedence.trap_is_second_in_any_order ...
# OK precedence.trap_is_second_in_any_order
ok 8 precedence.trap_is_second_in_any_order
# RUN precedence.errno_is_third ...
# OK precedence.errno_is_third
ok 9 precedence.errno_is_third
# RUN precedence.errno_is_third_in_any_order ...
# OK precedence.errno_is_third_in_any_order
ok 10 precedence.errno_is_third_in_any_order
# RUN precedence.trace_is_fourth ...
# OK precedence.trace_is_fourth
ok 11 precedence.trace_is_fourth
# RUN precedence.trace_is_fourth_in_any_order ...
# OK precedence.trace_is_fourth_in_any_order
ok 12 precedence.trace_is_fourth_in_any_order
# RUN precedence.log_is_fifth ...
# OK precedence.log_is_fifth
ok 13 precedence.log_is_fifth
# RUN precedence.log_is_fifth_in_any_order ...
# OK precedence.log_is_fifth_in_any_order
ok 14 precedence.log_is_fifth_in_any_order
# RUN TRACE_poke.read_has_side_effects ...
# OK TRACE_poke.read_has_side_effects
ok 15 TRACE_poke.read_has_side_effects
# RUN TRACE_poke.getpid_runs_normally ...
# OK TRACE_poke.getpid_runs_normally
ok 16 TRACE_poke.getpid_runs_normally
# RUN TRACE_syscall.ptrace.negative_ENOSYS ...
# OK TRACE_syscall.ptrace.negative_ENOSYS
ok 17 TRACE_syscall.ptrace.negative_ENOSYS
# RUN TRACE_syscall.ptrace.syscall_allowed ...
# OK TRACE_syscall.ptrace.syscall_allowed
ok 18 TRACE_syscall.ptrace.syscall_allowed
# RUN TRACE_syscall.ptrace.syscall_redirected ...
# OK TRACE_syscall.ptrace.syscall_redirected
ok 19 TRACE_syscall.ptrace.syscall_redirected
# RUN TRACE_syscall.ptrace.syscall_errno ...
# OK TRACE_syscall.ptrace.syscall_errno
ok 20 TRACE_syscall.ptrace.syscall_errno
# RUN TRACE_syscall.ptrace.syscall_faked ...
# OK TRACE_syscall.ptrace.syscall_faked
ok 21 TRACE_syscall.ptrace.syscall_faked
# RUN TRACE_syscall.ptrace.skip_after ...
# OK TRACE_syscall.ptrace.skip_after
ok 22 TRACE_syscall.ptrace.skip_after
# RUN TRACE_syscall.ptrace.kill_after ...
# OK TRACE_syscall.ptrace.kill_after
ok 23 TRACE_syscall.ptrace.kill_after
# RUN TRACE_syscall.seccomp.negative_ENOSYS ...
# OK TRACE_syscall.seccomp.negative_ENOSYS
ok 24 TRACE_syscall.seccomp.negative_ENOSYS
# RUN TRACE_syscall.seccomp.syscall_allowed ...
# OK TRACE_syscall.seccomp.syscall_allowed
ok 25 TRACE_syscall.seccomp.syscall_allowed
# RUN TRACE_syscall.seccomp.syscall_redirected ...
# OK TRACE_syscall.seccomp.syscall_redirected
ok 26 TRACE_syscall.seccomp.syscall_redirected
# RUN TRACE_syscall.seccomp.syscall_errno ...
# OK TRACE_syscall.seccomp.syscall_errno
ok 27 TRACE_syscall.seccomp.syscall_errno
# RUN TRACE_syscall.seccomp.syscall_faked ...
# OK TRACE_syscall.seccomp.syscall_faked
ok 28 TRACE_syscall.seccomp.syscall_faked
# RUN TRACE_syscall.seccomp.skip_after ...
# OK TRACE_syscall.seccomp.skip_after
ok 29 TRACE_syscall.seccomp.skip_after
# RUN TRACE_syscall.seccomp.kill_after ...
# OK TRACE_syscall.seccomp.kill_after
ok 30 TRACE_syscall.seccomp.kill_after
# RUN TSYNC.siblings_fail_prctl ...
# OK TSYNC.siblings_fail_prctl
ok 31 TSYNC.siblings_fail_prctl
# RUN TSYNC.two_siblings_with_ancestor ...
# OK TSYNC.two_siblings_with_ancestor
ok 32 TSYNC.two_siblings_with_ancestor
# RUN TSYNC.two_sibling_want_nnp ...
# OK TSYNC.two_sibling_want_nnp
ok 33 TSYNC.two_sibling_want_nnp
# RUN TSYNC.two_siblings_with_no_filter ...
# OK TSYNC.two_siblings_with_no_filter
ok 34 TSYNC.two_siblings_with_no_filter
# RUN TSYNC.two_siblings_with_one_divergence ...
# OK TSYNC.two_siblings_with_one_divergence
ok 35 TSYNC.two_siblings_with_one_divergence
# RUN TSYNC.two_siblings_with_one_divergence_no_tid_in_err ...
# OK TSYNC.two_siblings_with_one_divergence_no_tid_in_err
ok 36 TSYNC.two_siblings_with_one_divergence_no_tid_in_err
# RUN TSYNC.two_siblings_not_under_filter ...
# OK TSYNC.two_siblings_not_under_filter
ok 37 TSYNC.two_siblings_not_under_filter
# RUN global.kcmp ...
# OK global.kcmp
ok 38 global.kcmp
# RUN global.mode_strict_support ...
# OK global.mode_strict_support
ok 39 global.mode_strict_support
# RUN global.mode_strict_cannot_call_prctl ...
# OK global.mode_strict_cannot_call_prctl
ok 40 global.mode_strict_cannot_call_prctl
# RUN global.no_new_privs_support ...
# OK global.no_new_privs_support
ok 41 global.no_new_privs_support
# RUN global.mode_filter_support ...
# OK global.mode_filter_support
ok 42 global.mode_filter_support
# RUN global.mode_filter_without_nnp ...
# OK global.mode_filter_without_nnp
ok 43 global.mode_filter_without_nnp
# RUN global.filter_size_limits ...
# OK global.filter_size_limits
ok 44 global.filter_size_limits
# RUN global.filter_chain_limits ...
# OK global.filter_chain_limits
ok 45 global.filter_chain_limits
# RUN global.mode_filter_cannot_move_to_strict ...
# OK global.mode_filter_cannot_move_to_strict
ok 46 global.mode_filter_cannot_move_to_strict
# RUN global.mode_filter_get_seccomp ...
# OK global.mode_filter_get_seccomp
ok 47 global.mode_filter_get_seccomp
# RUN global.ALLOW_all ...
# OK global.ALLOW_all
ok 48 global.ALLOW_all
# RUN global.empty_prog ...
# OK global.empty_prog
ok 49 global.empty_prog
# RUN global.log_all ...
# OK global.log_all
ok 50 global.log_all
# RUN global.unknown_ret_is_kill_inside ...
# OK global.unknown_ret_is_kill_inside
ok 51 global.unknown_ret_is_kill_inside
# RUN global.unknown_ret_is_kill_above_allow ...
# OK global.unknown_ret_is_kill_above_allow
ok 52 global.unknown_ret_is_kill_above_allow
# RUN global.KILL_all ...
# OK global.KILL_all
ok 53 global.KILL_all
# RUN global.KILL_one ...
# OK global.KILL_one
ok 54 global.KILL_one
# RUN global.KILL_one_arg_one ...
# OK global.KILL_one_arg_one
ok 55 global.KILL_one_arg_one
# RUN global.KILL_one_arg_six ...
# OK global.KILL_one_arg_six
ok 56 global.KILL_one_arg_six
# RUN global.KILL_thread ...
# OK global.KILL_thread
ok 57 global.KILL_thread
# RUN global.KILL_process ...
# OK global.KILL_process
ok 58 global.KILL_process
# RUN global.arg_out_of_range ...
# OK global.arg_out_of_range
ok 59 global.arg_out_of_range
# RUN global.ERRNO_valid ...
# OK global.ERRNO_valid
ok 60 global.ERRNO_valid
# RUN global.ERRNO_zero ...
# OK global.ERRNO_zero
ok 61 global.ERRNO_zero
# RUN global.ERRNO_capped ...
# OK global.ERRNO_capped
ok 62 global.ERRNO_capped
# RUN global.ERRNO_order ...
# OK global.ERRNO_order
ok 63 global.ERRNO_order
# RUN global.negative_ENOSYS ...
# OK global.negative_ENOSYS
ok 64 global.negative_ENOSYS
# RUN global.seccomp_syscall ...
# OK global.seccomp_syscall
ok 65 global.seccomp_syscall
# RUN global.seccomp_syscall_mode_lock ...
# OK global.seccomp_syscall_mode_lock
ok 66 global.seccomp_syscall_mode_lock
# RUN global.detect_seccomp_filter_flags ...
# OK global.detect_seccomp_filter_flags
ok 67 global.detect_seccomp_filter_flags
# RUN global.TSYNC_first ...
# OK global.TSYNC_first
ok 68 global.TSYNC_first
# RUN global.syscall_restart ...
# OK global.syscall_restart
ok 69 global.syscall_restart
# RUN global.filter_flag_log ...
# OK global.filter_flag_log
ok 70 global.filter_flag_log
# RUN global.get_action_avail ...
# OK global.get_action_avail
ok 71 global.get_action_avail
# RUN global.get_metadata ...
# OK global.get_metadata
ok 72 global.get_metadata
# RUN global.user_notification_basic ...
# OK global.user_notification_basic
ok 73 global.user_notification_basic
# RUN global.user_notification_with_tsync ...
# OK global.user_notification_with_tsync
ok 74 global.user_notification_with_tsync
# RUN global.user_notification_kill_in_middle ...
# OK global.user_notification_kill_in_middle
ok 75 global.user_notification_kill_in_middle
# RUN global.user_notification_signal ...
# OK global.user_notification_signal
ok 76 global.user_notification_signal
# RUN global.user_notification_closed_listener ...
# OK global.user_notification_closed_listener
ok 77 global.user_notification_closed_listener
# RUN global.user_notification_child_pid_ns ...
# OK global.user_notification_child_pid_ns
ok 78 global.user_notification_child_pid_ns
# RUN global.user_notification_sibling_pid_ns ...
# OK global.user_notification_sibling_pid_ns
ok 79 global.user_notification_sibling_pid_ns
# RUN global.user_notification_fault_recv ...
# OK global.user_notification_fault_recv
ok 80 global.user_notification_fault_recv
# RUN global.seccomp_get_notif_sizes ...
# OK global.seccomp_get_notif_sizes
ok 81 global.seccomp_get_notif_sizes
# RUN global.user_notification_continue ...
# OK global.user_notification_continue
ok 82 global.user_notification_continue
# RUN global.user_notification_filter_empty ...
# OK global.user_notification_filter_empty
ok 83 global.user_notification_filter_empty
# RUN global.user_notification_filter_empty_threaded ...
# OK global.user_notification_filter_empty_threaded
ok 84 global.user_notification_filter_empty_threaded
# RUN global.user_notification_addfd ...
# OK global.user_notification_addfd
ok 85 global.user_notification_addfd
# RUN global.user_notification_addfd_rlimit ...
# OK global.user_notification_addfd_rlimit
ok 86 global.user_notification_addfd_rlimit
# PASSED: 86 / 86 tests passed.
# Totals: pass:86 fail:0 xfail:0 xpass:0 skip:0 error:0

--
Thanks.
-- Max