diff options
author | Will Drewry <wad@chromium.org> | 2012-04-12 16:48:03 -0500 |
---|---|---|
committer | James Morris <james.l.morris@oracle.com> | 2012-04-14 11:13:21 +1000 |
commit | c6cfbeb4029610c8c330c312dcf4d514cc067554 (patch) | |
tree | d61f1431884e042dc47ceb020fbcfada0c66bb3b /samples/seccomp/bpf-helper.c | |
parent | fb0fadf9b213f55ca9368f3edafe51101d5d2deb (diff) | |
download | op-kernel-dev-c6cfbeb4029610c8c330c312dcf4d514cc067554.zip op-kernel-dev-c6cfbeb4029610c8c330c312dcf4d514cc067554.tar.gz |
x86: Enable HAVE_ARCH_SECCOMP_FILTER
Enable support for seccomp filter on x86:
- syscall_get_arch()
- syscall_get_arguments()
- syscall_rollback()
- syscall_set_return_value()
- SIGSYS siginfo_t support
- secure_computing is called from a ptrace_event()-safe context
- secure_computing return value is checked (see below).
SECCOMP_RET_TRACE and SECCOMP_RET_TRAP may result in seccomp needing to
skip a system call without killing the process. This is done by
returning a non-zero (-1) value from secure_computing. This change
makes x86 respect that return value.
To ensure that minimal kernel code is exposed, a non-zero return value
results in an immediate return to user space (with an invalid syscall
number).
Signed-off-by: Will Drewry <wad@chromium.org>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Eric Paris <eparis@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
v18: rebase and tweaked change description, acked-by
v17: added reviewed by and rebased
v..: all rebases since original introduction.
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'samples/seccomp/bpf-helper.c')
0 files changed, 0 insertions, 0 deletions