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

Palmer Dabbelt palmer at sifive.com
Mon Oct 29 13:27:55 PDT 2018


On Sun, 28 Oct 2018 04:07:55 PDT (-0700), david.abdurachmanov at gmail.com wrote:
> On Thu, Oct 25, 2018 at 10:36 PM Paul Moore <paul at paul-moore.com> wrote:
>>
>> On Thu, Oct 25, 2018 at 2:31 PM David Abdurachmanov
>> <david.abdurachmanov at gmail.com> wrote:
>> > On Wed, Oct 24, 2018 at 10:40 PM Palmer Dabbelt <palmer at sifive.com> wrote:
>> > > From: "Wesley W. Terpstra" <wesley at 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 at 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!



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