On 30/03/16 06:06, Kees Cook wrote:
On Tue, Mar 29, 2016 at 1:35 AM, Matt Redfearn <matt.redfearn@xxxxxxxxxx> wrote:
These patches imporve seccomp support on MIPS.
Firstly support is added for building the seccomp_bpf self test for
MIPS. The
initial results of these tests were:
32bit kernel O32 userspace before: 48 / 48 pass
64bit kernel O32 userspace before: 47 / 48 pass
Failures: TRAP.Handler
64bit kernel N32 userspace before: 44 / 48 pass
Failures: global.mode_strict_support, TRAP.handler,
TRACE_syscall.syscall_redirected, TRACE_syscall.syscall_dropped
64bit kernel N64 userspace before: 46 / 48 pass
Failures: TRACE_syscall.syscall_redirected,
TRACE_syscall.syscall_dropped
The subsequent patches fix issues that were causing the above tests to
fail. With
these fixes, the results are:
32bit kernel O32 userspace after: 48 / 48
64bit kernel O32 userspace after: 48 / 48
64bit kernel N32 userspace after: 48 / 48
64bit kernel N64 userspace after: 48 / 48
Thanks,
Matt
Changes in v2:
- Tested on additional platforms
- Replace __NR_syscall which isn't defined for N32 / N64 ABIs
Matt Redfearn (6):
selftests/seccomp: add MIPS self-test support
MIPS: Support sending SIG_SYS to 32bit userspace from 64bit kernel
MIPS: scall: Handle seccomp filters which redirect syscalls
seccomp: Get compat syscalls from asm-generic header
MIPS: seccomp: Support compat with both O32 and N32
secomp: Constify mode1 syscall whitelist
arch/mips/include/asm/seccomp.h | 47 +++++++++++++++------------
arch/mips/kernel/scall32-o32.S | 11 +++----
arch/mips/kernel/scall64-64.S | 3 +-
arch/mips/kernel/scall64-n32.S | 14 +++++---
arch/mips/kernel/scall64-o32.S | 14 +++++---
arch/mips/kernel/signal32.c | 6 ++++
include/asm-generic/seccomp.h | 14 ++++++++
kernel/seccomp.c | 13 ++------
tools/testing/selftests/seccomp/seccomp_bpf.c | 30 +++++++++++++++--
9 files changed, 101 insertions(+), 51 deletions(-)
Thanks for digging into this! Consider all the seccomp pieces:
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Probably best to carry it all in the MIPS tree, but if you want to me
take pieces of it into my seccomp tree, I can do that. Up to you. :)
-Kees
Thanks Kees. Ralf is going to take it via the MIPS tree.
Matt
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