Re: [PATCH 2/2] RISC-V: Add support for SECCOMP

Palmer Dabbelt
2018-10-29T20:27:55Z

On Sun, 28 Oct 2018 04:07:55 PDT (-0700), david.abdurachmanov@gmail.com wrote:
> On Thu, Oct 25, 2018 at 10:36 PM Paul Moore <paul@paul-moore.com> wrote:
>>
>> On Thu, Oct 25, 2018 at 2:31 PM David Abdurachmanov
>> <david.abdurachmanov@gmail.com> wrote:
>> > On Wed, Oct 24, 2018 at 10:40 PM Palmer Dabbelt <palmer@sifive.com> wrote:
>> > > From: "Wesley W. Terpstra" <wesley@sifive.com>
>>
>> ...
>>
>> > Palmer,
>> >
>> > Half of the patch seems to touch audit parts. I started working on audit
>> > support this morning, and I can boot Fedora with audit traces.
>> >
>> > [root@fedora-riscv ~]# dmesg | grep audit
>> > [ 0.312000] audit: initializing netlink subsys (disabled)
>> > [ 0.316000] audit: type=2000 audit(0.316:1): state=initialized
>> > audit_enabled=0 res=1
>> > [ 7.288000] audit: type=1130 audit(1529665913.772:2): pid=1 uid=0
>> > auid=4294967295 ses=4294967295 msg='unit=systemd-remount-fs
>> > comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=?
>> > terminal=? res=success'
>> > [ 7.684000] audit: type=1130 audit(1529665914.176:3): pid=1 uid=0
>> > auid=4294967295 ses=4294967295 msg='unit=systemd-sysctl comm="systemd"
>> > exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=?
>> > res=success'
>> > [..]
>> >
>> > I am still working on audit user-space support for better testing.
>> >
>> > I suggest we first implement audit and then seccomp.
>>
>> FYI, while small and far from comprehensive, we do have a test suite
>> we use for basic validation of the audit kernel bits which may be
>> helpful while you're working on the audit enablement:
>>
>> * https://github.com/linux-audit/audit-testsuite
>
> Currently I checked the following to work:
> - /proc/self/loginuid (required by DNF [package manager])
> - auditctl (checked several different example rules from internet)
> - aulast
> - aulastlog
> - ausearch
> - ausyscall
> - aureport
> - autrace (compared some syscalls to strace: order and
> return value/input arguments seems to be correct)
>
> I checked audit-testsuite yesterday and it seems to be only for
> x86-64 / x86-32. After adjusting it (MODE, syscalls) I am at:
>
> Failed 4/14 test programs. 19/88 subtests failed.
>
> I don't plan to look further in the failure, e.g.:
> - syscall_socketcall: that's an old stuff and not relevant to
> new arches
> - syscall_module: Fedora kernel currently is not compiled
> with kernel loadable module support
> - filter_exclude: two tests fail because id -Z doesn't print
> any categories, but "semanage login -l" output is identical
> between x86_64 and riscv64
> - netfilter_pkt: don't have CONFIG_IP_NF_MANGLE enabled
>
> Fedora kernel currently has minimal CONFIG_* options
> and is built without loadable module support.
>
> I will send the patches for review soon.

Thanks!