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Date:   Sat, 29 Aug 2020 13:09:43 +0200
From:   John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
To:     Rich Felker <dalias@...c.org>
Cc:     Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>,
        linux-sh@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>
Subject: Re: [PATCH 3/4] sh: Add SECCOMP_FILTER

Hi!

On 8/29/20 2:49 AM, Rich Felker wrote:
> This restored my ability to use strace

I can confirm that. However ...

> and I've written and tested a minimal strace-like hack using
> SECCOMP_RET_USER_NOTIF that works as
> expected on both j2 and qemu-system-sh4, so I think the above is
> correct.

The seccomp live testsuite has regressed.

With your patch:

=============== Sat 29 Aug 2020 12:35:52 PM CEST ===============
Regression Test Report ("regression -T live")
 batch name: 01-sim-allow
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 02-sim-basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 03-sim-basic_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 04-sim-multilevel_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 05-sim-long_jumps
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 06-sim-actions
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 07-sim-db_bug_looping
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 08-sim-subtree_checks
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 09-sim-syscall_priority_pre
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 10-sim-syscall_priority_post
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 11-basic-basic_errors
 test mode:  c
 test type:  basic
 batch name: 12-sim-basic_masked_ops
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 13-basic-attrs
 test mode:  c
 test type:  basic
 batch name: 14-sim-reset
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 15-basic-resolver
 test mode:  c
 test type:  basic
 batch name: 16-sim-arch_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 17-sim-arch_merge
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 18-sim-basic_allowlist
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 19-sim-missing_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 20-live-basic_die
 test mode:  c
 test type:  live
Test 20-live-basic_die%%001-00001 result:   SUCCESS
Test 20-live-basic_die%%002-00001 result:   SUCCESS
Test 20-live-basic_die%%003-00001 result:   FAILURE 20-live-basic_die 1 ERRNO rc=38
 batch name: 21-live-basic_allow
 test mode:  c
 test type:  live
Test 21-live-basic_allow%%001-00001 result:   SUCCESS
 batch name: 22-sim-basic_chains_array
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 23-sim-arch_all_le_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 24-live-arg_allow
 test mode:  c
 test type:  live
Test 24-live-arg_allow%%001-00001 result:   SUCCESS
 batch name: 25-sim-multilevel_chains_adv
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 26-sim-arch_all_be_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 27-sim-bpf_blk_state
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 28-sim-arch_x86
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 29-sim-pseudo_syscall
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 30-sim-socket_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 31-basic-version_check
 test mode:  c
 test type:  basic
 batch name: 32-live-tsync_allow
 test mode:  c
 test type:  live
Test 32-live-tsync_allow%%001-00001 result:   SUCCESS
 batch name: 33-sim-socket_syscalls_be
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 34-sim-basic_denylist
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 35-sim-negative_one
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 36-sim-ipc_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 37-sim-ipc_syscalls_be
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 38-basic-pfc_coverage
 test mode:  c
 test type:  basic
 batch name: 39-basic-api_level
 test mode:  c
 test type:  basic
 batch name: 40-sim-log
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 41-sim-syscall_priority_arch
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 42-sim-adv_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 43-sim-a2_order
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 44-live-a2_order
 test mode:  c
 test type:  live
Test 44-live-a2_order%%001-00001 result:   FAILURE 44-live-a2_order 1 ALLOW rc=1
 batch name: 45-sim-chain_code_coverage
 test mode:  c
 test type:  bpf-sim
 batch name: 46-sim-kill_process
 test mode:  c
 test type:  bpf-sim
 batch name: 47-live-kill_process
 test mode:  c
 test type:  live
Test 47-live-kill_process%%001-00001 result:   SUCCESS
 batch name: 48-sim-32b_args
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 49-sim-64b_comparisons
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 50-sim-hash_collision
 test mode:  c
 test type:  bpf-sim
 batch name: 51-live-user_notification
 test mode:  c
 test type:  live
Test 51-live-user_notification%%001-00001 result:   FAILURE 51-live-user_notification 5 ALLOW rc=14
 batch name: 52-basic-load
 test mode:  c
 test type:  basic
 batch name: 53-sim-binary_tree
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 54-live-binary_tree
 test mode:  c
 test type:  live
Test 54-live-binary_tree%%001-00001 result:   SUCCESS
 batch name: 55-basic-pfc_binary_tree
 test mode:  c
 test type:  basic
 batch name: 56-basic-iterate_syscalls
 test mode:  c
 test type:  basic
 batch name: 57-basic-rawsysrc
 test mode:  c
 test type:  basic
 batch name: 58-live-tsync_notify
 test mode:  c
 test type:  live
Test 58-live-tsync_notify%%001-00001 result:   FAILURE 58-live-tsync_notify 6 ALLOW rc=14
Regression Test Summary
 tests run: 11
 tests skipped: 0
 tests passed: 7
 tests failed: 4
 tests errored: 0
============================================================

And without:

=============== Sat 29 Aug 2020 01:03:07 PM CEST ===============
Regression Test Report ("regression -T live")
 batch name: 01-sim-allow
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 02-sim-basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 03-sim-basic_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 04-sim-multilevel_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 05-sim-long_jumps
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 06-sim-actions
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 07-sim-db_bug_looping
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 08-sim-subtree_checks
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 09-sim-syscall_priority_pre
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 10-sim-syscall_priority_post
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 11-basic-basic_errors
 test mode:  c
 test type:  basic
 batch name: 12-sim-basic_masked_ops
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 13-basic-attrs
 test mode:  c
 test type:  basic
 batch name: 14-sim-reset
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 15-basic-resolver
 test mode:  c
 test type:  basic
 batch name: 16-sim-arch_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 17-sim-arch_merge
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 18-sim-basic_allowlist
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 19-sim-missing_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 20-live-basic_die
 test mode:  c
 test type:  live
Test 20-live-basic_die%%001-00001 result:   SUCCESS
Test 20-live-basic_die%%002-00001 result:   SUCCESS
Test 20-live-basic_die%%003-00001 result:   SUCCESS
 batch name: 21-live-basic_allow
 test mode:  c
 test type:  live
Test 21-live-basic_allow%%001-00001 result:   SUCCESS
 batch name: 22-sim-basic_chains_array
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 23-sim-arch_all_le_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 24-live-arg_allow
 test mode:  c
 test type:  live
Test 24-live-arg_allow%%001-00001 result:   SUCCESS
 batch name: 25-sim-multilevel_chains_adv
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 26-sim-arch_all_be_basic
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 27-sim-bpf_blk_state
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 28-sim-arch_x86
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 29-sim-pseudo_syscall
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 30-sim-socket_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 31-basic-version_check
 test mode:  c
 test type:  basic
 batch name: 32-live-tsync_allow
 test mode:  c
 test type:  live
Test 32-live-tsync_allow%%001-00001 result:   SUCCESS
 batch name: 33-sim-socket_syscalls_be
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 34-sim-basic_denylist
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 35-sim-negative_one
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 36-sim-ipc_syscalls
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 37-sim-ipc_syscalls_be
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 38-basic-pfc_coverage
 test mode:  c
 test type:  basic
 batch name: 39-basic-api_level
 test mode:  c
 test type:  basic
 batch name: 40-sim-log
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 41-sim-syscall_priority_arch
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 42-sim-adv_chains
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 43-sim-a2_order
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 44-live-a2_order
 test mode:  c
 test type:  live
Test 44-live-a2_order%%001-00001 result:   SUCCESS
 batch name: 45-sim-chain_code_coverage
 test mode:  c
 test type:  bpf-sim
 batch name: 46-sim-kill_process
 test mode:  c
 test type:  bpf-sim
 batch name: 47-live-kill_process
 test mode:  c
 test type:  live
Test 47-live-kill_process%%001-00001 result:   SUCCESS
 batch name: 48-sim-32b_args
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-sim-fuzz
 test mode:  c
 test type:  bpf-valgrind
 batch name: 49-sim-64b_comparisons
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 50-sim-hash_collision
 test mode:  c
 test type:  bpf-sim
 batch name: 51-live-user_notification
 test mode:  c
 test type:  live
Test 51-live-user_notification%%001-00001 result:   SUCCESS
 batch name: 52-basic-load
 test mode:  c
 test type:  basic
 batch name: 53-sim-binary_tree
 test mode:  c
 test type:  bpf-sim
 test mode:  c
 test type:  bpf-valgrind
 batch name: 54-live-binary_tree
 test mode:  c
 test type:  live
Test 54-live-binary_tree%%001-00001 result:   SUCCESS
 batch name: 55-basic-pfc_binary_tree
 test mode:  c
 test type:  basic
 batch name: 56-basic-iterate_syscalls
 test mode:  c
 test type:  basic
 batch name: 57-basic-rawsysrc
 test mode:  c
 test type:  basic
 batch name: 58-live-tsync_notify
 test mode:  c
 test type:  live
Test 58-live-tsync_notify%%001-00001 result:   SUCCESS
Regression Test Summary
 tests run: 11
 tests skipped: 0
 tests passed: 11
 tests failed: 0
 tests errored: 0
============================================================

To test libseccomp, check out my superh branch from here:

> https://github.com/glaubitz/libseccomp/tree/superh

then build and test with:

# ./autogen.sh && ./configure && make && make check && make check-build && cd tests && ./regression -T live

Maybe Michael Karcher has any idea what's wrong with the strace stuff?

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@...ian.org
`. `'   Freie Universitaet Berlin - glaubitz@...sik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

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