linux-kernel - Re: [PATCH v1 8/8] lsm: wireup syscalls lsm_self_attr and lsm_module

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Date:   Wed, 26 Oct 2022 10:07:43 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Casey Schaufler <casey@...aufler-ca.com>
Cc:     casey.schaufler@...el.com, paul@...l-moore.com,
        linux-security-module@...r.kernel.org, jmorris@...ei.org,
        keescook@...omium.org, john.johansen@...onical.com,
        penguin-kernel@...ove.sakura.ne.jp, stephen.smalley.work@...il.com,
        linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        mic@...ikod.net, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH v1 8/8] lsm: wireup syscalls lsm_self_attr and lsm_module_list

Hi Casey,

CC linux-perf

On Tue, Oct 25, 2022 at 8:52 PM Casey Schaufler <casey@...aufler-ca.com> wrote:
> Wireup two syscalls for Linux Security Modules.
>
> Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>

Thanks for your patch!

>  arch/m68k/kernel/syscalls/syscall.tbl               | 2 ++

Acked-by: Geert Uytterhoeven <geert@...ux-m68k.org> # m68k

> --- a/arch/arm64/include/asm/unistd32.h
> +++ b/arch/arm64/include/asm/unistd32.h
> @@ -907,6 +907,8 @@ __SYSCALL(__NR_process_mrelease, sys_process_mrelease)
>  __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
>  #define __NR_set_mempolicy_home_node 450
>  __SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
> +#define __NR_lsm_attr_set 451
> +__SYSCALL(__NR_lsm_attr_set, sys_lsm_attr_set)

Missing lsm_module_list.

>
>  /*
>   * Please add new compat syscalls above this comment and update

> --- a/include/uapi/asm-generic/unistd.h
> +++ b/include/uapi/asm-generic/unistd.h
> @@ -886,8 +886,11 @@ __SYSCALL(__NR_futex_waitv, sys_futex_waitv)
>  #define __NR_set_mempolicy_home_node 450
>  __SYSCALL(__NR_set_mempolicy_home_node, sys_set_mempolicy_home_node)
>
> +#define __NR_lsm_self_attr 451
> +__SYSCALL(__NR_lsm_self_attr, sys_lsm_self_attr)

Missing lsm_module_list.

> +
>  #undef __NR_syscalls
> -#define __NR_syscalls 451
> +#define __NR_syscalls 452

Hence one off.

> --- a/tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl
> +++ b/tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl
> @@ -365,3 +365,5 @@
>  448    n64     process_mrelease                sys_process_mrelease
>  449    n64     futex_waitv                     sys_futex_waitv
>  450    common  set_mempolicy_home_node         sys_set_mempolicy_home_node
> +451    n64     lsm_self_attr                   sys_lsm_self_attr
> +452    n64     lsm_module_list                 sys_lsm_module_list
> diff --git a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
> index 2bca64f96164..7b779080acbe 100644
> --- a/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
> +++ b/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
> @@ -530,3 +530,5 @@
>  448    common  process_mrelease                sys_process_mrelease
>  449    common  futex_waitv                     sys_futex_waitv
>  450    nospu   set_mempolicy_home_node         sys_set_mempolicy_home_node
> +451    common  lsm_self_attr                   sys_lsm_self_attr
> +452    common  lsm_module_list                 sys_lsm_module_list
> diff --git a/tools/perf/arch/s390/entry/syscalls/syscall.tbl b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> index 799147658dee..eaba1ed5654e 100644
> --- a/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> +++ b/tools/perf/arch/s390/entry/syscalls/syscall.tbl
> @@ -453,3 +453,5 @@
>  448  common    process_mrelease        sys_process_mrelease            sys_process_mrelease
>  449  common    futex_waitv             sys_futex_waitv                 sys_futex_waitv
>  450  common    set_mempolicy_home_node sys_set_mempolicy_home_node     sys_set_mempolicy_home_node
> +451  common    lsm_self_attr           sys_lsm_self_attr       sys_lsm_self_attr
> +452  common    lsm_module_list         sys_lsm_module_list     sys_lsm_module_list
> diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
> index c84d12608cd2..40b35e7069a7 100644
> --- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
> +++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
> @@ -372,6 +372,8 @@
>  448    common  process_mrelease        sys_process_mrelease
>  449    common  futex_waitv             sys_futex_waitv
>  450    common  set_mempolicy_home_node sys_set_mempolicy_home_node
> +451    common  lsm_self_attr           sys_lsm_self_attr
> +452    common  lsm_module_list         sys_lsm_module_list

BTW, why are the syscall tables not shared between arch/ and tools/perf/?
They seem to be identical (except for ppc due to 32/64 vs. common)?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds