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authorWill Drewry <wad@chromium.org>2012-04-12 16:48:03 -0500
committerJames Morris <james.l.morris@oracle.com>2012-04-14 11:13:21 +1000
commitc6cfbeb4029610c8c330c312dcf4d514cc067554 (patch)
treed61f1431884e042dc47ceb020fbcfada0c66bb3b /samples/Makefile
parentfb0fadf9b213f55ca9368f3edafe51101d5d2deb (diff)
downloadlinux-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>
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