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Date: Thu, 6 Dec 2018 19:25:55 +0100
From: David Abdurachmanov <david.abdurachmanov@...il.com>
To: Kees Cook <keescook@...omium.org>
Cc: Palmer Dabbelt <palmer@...ive.com>, aou@...s.berkeley.edu,
luto@...capital.net, Will Drewry <wad@...omium.org>,
Green Hu <green.hu@...il.com>, deanbo422@...il.com,
linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 1/2] riscv: add support for SECCOMP incl. filters
On Thu, Dec 6, 2018 at 5:52 PM Kees Cook <keescook@...omium.org> wrote:
>
> On Thu, Dec 6, 2018 at 7:02 AM David Abdurachmanov
> <david.abdurachmanov@...il.com> wrote:
> > The patch adds support for SECCOMP and SECCOMP_FILTER (BPF).
>
> Can you add support to tools/testing/selftests/seccomp/seccomp_bpf.c
> as well? That selftest finds a lot of weird corner-cases...
I hate it locally and will include in v2.
The results see fine (tested in QEMU).
TAP version 13
selftests: seccomp: seccomp_bpf
========================================
[==========] Running 64 tests from 1 test cases.
[ RUN ] global.mode_strict_support
[ OK ] global.mode_strict_support
[ RUN ] global.mode_strict_cannot_call_prctl
[ OK ] global.mode_strict_cannot_call_prctl
[ RUN ] global.no_new_privs_support
[ OK ] global.no_new_privs_support
[ RUN ] global.mode_filter_support
[ OK ] global.mode_filter_support
[ RUN ] global.mode_filter_without_nnp
[ OK ] global.mode_filter_without_nnp
[ RUN ] global.filter_size_limits
[ OK ] global.filter_size_limits
[ RUN ] global.filter_chain_limits
[ OK ] global.filter_chain_limits
[ RUN ] global.mode_filter_cannot_move_to_strict
[ OK ] global.mode_filter_cannot_move_to_strict
[ RUN ] global.mode_filter_get_seccomp
[ OK ] global.mode_filter_get_seccomp
[ RUN ] global.ALLOW_all
[ OK ] global.ALLOW_all
[ RUN ] global.empty_prog
[ OK ] global.empty_prog
[ RUN ] global.log_all
[ OK ] global.log_all
[ RUN ] global.unknown_ret_is_kill_inside
[ OK ] global.unknown_ret_is_kill_inside
[ RUN ] global.unknown_ret_is_kill_above_allow
[ OK ] global.unknown_ret_is_kill_above_allow
[ RUN ] global.KILL_all
[ OK ] global.KILL_all
[ RUN ] global.KILL_one
[ OK ] global.KILL_one
[ RUN ] global.KILL_one_arg_one
[ OK ] global.KILL_one_arg_one
[ RUN ] global.KILL_one_arg_six
[ OK ] global.KILL_one_arg_six
[ RUN ] global.KILL_thread
[ OK ] global.KILL_thread
[ RUN ] global.KILL_process
[ OK ] global.KILL_process
[ RUN ] global.arg_out_of_range
[ OK ] global.arg_out_of_range
[ RUN ] global.ERRNO_valid
[ OK ] global.ERRNO_valid
[ RUN ] global.ERRNO_zero
[ OK ] global.ERRNO_zero
[ RUN ] global.ERRNO_capped
[ OK ] global.ERRNO_capped
[ RUN ] global.ERRNO_order
[ OK ] global.ERRNO_order
[ RUN ] TRAP.dfl
[ OK ] TRAP.dfl
[ RUN ] TRAP.ign
[ OK ] TRAP.ign
[ RUN ] TRAP.handler
[ OK ] TRAP.handler
[ RUN ] precedence.allow_ok
[ OK ] precedence.allow_ok
[ RUN ] precedence.kill_is_highest
[ OK ] precedence.kill_is_highest
[ RUN ] precedence.kill_is_highest_in_any_order
[ OK ] precedence.kill_is_highest_in_any_order
[ RUN ] precedence.trap_is_second
[ OK ] precedence.trap_is_second
[ RUN ] precedence.trap_is_second_in_any_order
[ OK ] precedence.trap_is_second_in_any_order
[ RUN ] precedence.errno_is_third
[ OK ] precedence.errno_is_third
[ RUN ] precedence.errno_is_third_in_any_order
[ OK ] precedence.errno_is_third_in_any_order
[ RUN ] precedence.trace_is_fourth
[ OK ] precedence.trace_is_fourth
[ RUN ] precedence.trace_is_fourth_in_any_order
[ OK ] precedence.trace_is_fourth_in_any_order
[ RUN ] precedence.log_is_fifth
[ OK ] precedence.log_is_fifth
[ RUN ] precedence.log_is_fifth_in_any_order
[ OK ] precedence.log_is_fifth_in_any_order
[ RUN ] TRACE_poke.read_has_side_effects
[ OK ] TRACE_poke.read_has_side_effects
[ RUN ] TRACE_poke.getpid_runs_normally
[ OK ] TRACE_poke.getpid_runs_normally
[ RUN ] TRACE_syscall.ptrace_syscall_redirected
[ OK ] TRACE_syscall.ptrace_syscall_redirected
[ RUN ] TRACE_syscall.ptrace_syscall_dropped
[ OK ] TRACE_syscall.ptrace_syscall_dropped
[ RUN ] TRACE_syscall.syscall_allowed
[ OK ] TRACE_syscall.syscall_allowed
[ RUN ] TRACE_syscall.syscall_redirected
[ OK ] TRACE_syscall.syscall_redirected
[ RUN ] TRACE_syscall.syscall_dropped
[ OK ] TRACE_syscall.syscall_dropped
[ RUN ] TRACE_syscall.skip_after_RET_TRACE
[ OK ] TRACE_syscall.skip_after_RET_TRACE
[ RUN ] TRACE_syscall.kill_after_RET_TRACE
[ OK ] TRACE_syscall.kill_after_RET_TRACE
[ RUN ] TRACE_syscall.skip_after_ptrace
[ OK ] TRACE_syscall.skip_after_ptrace
[ RUN ] TRACE_syscall.kill_after_ptrace
[ OK ] TRACE_syscall.kill_after_ptrace
[ RUN ] global.seccomp_syscall
[ OK ] global.seccomp_syscall
[ RUN ] global.seccomp_syscall_mode_lock
[ OK ] global.seccomp_syscall_mode_lock
[ RUN ] global.detect_seccomp_filter_flags
[ OK ] global.detect_seccomp_filter_flags
[ RUN ] global.TSYNC_first
[ OK ] global.TSYNC_first
[ RUN ] TSYNC.siblings_fail_prctl
[ OK ] TSYNC.siblings_fail_prctl
[ RUN ] TSYNC.two_siblings_with_ancestor
[ OK ] TSYNC.two_siblings_with_ancestor
[ RUN ] TSYNC.two_sibling_want_nnp
[ OK ] TSYNC.two_sibling_want_nnp
[ RUN ] TSYNC.two_siblings_with_no_filter
[ OK ] TSYNC.two_siblings_with_no_filter
[ RUN ] TSYNC.two_siblings_with_one_divergence
[ OK ] TSYNC.two_siblings_with_one_divergence
[ RUN ] TSYNC.two_siblings_not_under_filter
[ OK ] TSYNC.two_siblings_not_under_filter
[ RUN ] global.syscall_restart
[ OK ] global.syscall_restart
[ RUN ] global.filter_flag_log
[ OK ] global.filter_flag_log
[ RUN ] global.get_action_avail
[ OK ] global.get_action_avail
[ RUN ] global.get_metadata
[ OK ] global.get_metadata
[==========] 64 / 64 tests passed.
[ PASSED ]
ok 1..1 selftests: seccomp: seccomp_bpf [PASS]
selftests: seccomp: seccomp_benchmark
========================================
Calibrating reasonable sample size...
1544120467.383132905 - 1544120467.382814604 = 318301
1544120467.384111505 - 1544120467.383931405 = 180100
1544120467.385728706 - 1544120467.384510905 = 1217801
1544120467.386858006 - 1544120467.386096506 = 761500
1544120467.388563407 - 1544120467.387171006 = 1392401
1544120467.392465908 - 1544120467.390143107 = 2322801
1544120467.397988410 - 1544120467.393666109 = 4322301
1544120467.406494614 - 1544120467.398347511 = 8147103
1544120467.427372522 - 1544120467.406955414 = 20417108
1544120467.467600338 - 1544120467.427772222 = 39828116
1544120467.542484667 - 1544120467.467954738 = 74529929
1544120467.693806026 - 1544120467.543004867 = 150801159
1544120467.970921334 - 1544120467.694244026 = 276677308
1544120468.522149049 - 1544120467.971549534 = 550599515
1544120469.637696984 - 1544120468.522606749 = 1115090235
1544120471.829467338 - 1544120469.638147084 = 2191320254
1544120476.263601568 - 1544120471.829850239 = 4433751329
1544120485.135465027 - 1544120476.263980268 = 8871484759
Benchmarking 4194304 samples...
26.716000000 - 17.812000000 = 8904000000
getpid native: 2122 ns
46.548000000 - 26.716000000 = 19832000000
getpid RET_ALLOW: 4728 ns
Estimated seccomp overhead per syscall: 2606 ns
ok 1..2 selftests: seccomp: seccomp_benchmark [PASS]
>
> > diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h
> > index 1c9cc8389928..1fd6e4130cab 100644
> > --- a/arch/riscv/include/asm/thread_info.h
> > +++ b/arch/riscv/include/asm/thread_info.h
> > @@ -81,6 +81,7 @@ struct thread_info {
> > #define TIF_MEMDIE 5 /* is terminating due to OOM killer */
> > #define TIF_SYSCALL_TRACEPOINT 6 /* syscall tracepoint instrumentation */
> > #define TIF_SYSCALL_AUDIT 7 /* syscall auditing */
> > +#define TIF_SECCOMP 8 /* syscall secure computing */
>
> Nit: extra tab needs to be removed.
>
> --
> Kees Cook
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