linux-kernel - Re: [GIT PULL] security: seccomp changes for v4.21

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Date:   Mon, 7 Jan 2019 11:15:40 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     James Morris <jmorris@...ei.org>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [GIT PULL] security: seccomp changes for v4.21


* James Morris <jmorris@...ei.org> wrote:

> From Kees:
> 
> "- Add SECCOMP_RET_USER_NOTIF
> 
> - seccomp fixes for sparse warnings and s390 build (Tycho)"
> 
> 
> 
> The following changes since commit 1072bd678547f8663cfb81a22fdb50c589e4976e:
> 
>   security: fs: make inode explicitly non-modular (2018-12-12 14:58:51 -0800)
> 
> are available in the Git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git next-seccomp
> 
> for you to fetch changes up to 55b8cbe470d103b44104c64dbf89e5cad525d4e0:
> 
>   Merge tag 'seccomp-next-part2' of https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into next-seccomp (2018-12-17 11:36:26 -0800)
> 
> ----------------------------------------------------------------
> James Morris (2):
>       Merge tag 'seccomp-next' of https://git.kernel.org/.../kees/linux into next-seccomp
>       Merge tag 'seccomp-next-part2' of https://git.kernel.org/.../kees/linux into next-seccomp
> 
> Tycho Andersen (6):
>       seccomp: hoist struct seccomp_data recalculation higher
>       seccomp: switch system call argument type to void *
>       seccomp: add a return code to trap to userspace
>       samples: add an example of seccomp user trap
>       seccomp: fix poor type promotion
>       seccomp, s390: fix build for syscall type change
> 
>  Documentation/ioctl/ioctl-number.txt           |   1 +
>  Documentation/userspace-api/seccomp_filter.rst |  84 +++++
>  arch/s390/kernel/compat_wrapper.c              |   2 +-
>  include/linux/seccomp.h                        |   9 +-
>  include/linux/syscalls.h                       |   2 +-
>  include/uapi/linux/seccomp.h                   |  40 ++-
>  kernel/seccomp.c                               | 467 ++++++++++++++++++++++++-
>  samples/seccomp/.gitignore                     |   1 +
>  samples/seccomp/Makefile                       |   7 +-
>  samples/seccomp/user-trap.c                    | 375 ++++++++++++++++++++
>  tools/testing/selftests/seccomp/seccomp_bpf.c  | 447 ++++++++++++++++++++++-
>  11 files changed, 1411 insertions(+), 24 deletions(-)
>  create mode 100644 samples/seccomp/user-trap.c

32-bit x86 allyesconfig doesn't build:

 /usr/bin/ld: i386:x86-64 architecture of input file `samples/seccomp/user-trap.o' is incompatible with i386 output
 /usr/bin/ld: samples/seccomp/user-trap.o: file class ELFCLASS64 incompatible with ELFCLASS32
 /usr/bin/ld: final link failed: File in wrong format
 collect2: error: ld returned 1 exit status
 scripts/Makefile.host:99: recipe for target 'samples/seccomp/user-trap' failed
 make[2]: *** [samples/seccomp/user-trap] Error 1

Is this a known regression?

Thanks,

	Ingo