[lkml]   [2020]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array
On Fri, Sep 25, 2020 at 02:15:50AM +0200, Jann Horn wrote:
> On Fri, Sep 25, 2020 at 2:01 AM Kees Cook <> wrote:
> > 2) seccomp needs to handle "multiplexed" tables like x86_x32 (distros
> > haven't removed CONFIG_X86_X32 widely yet, so it is a reality that
> > it must be dealt with), which means seccomp's idea of the arch
> > "number" can't be the same as the AUDIT_ARCH.
> Sure, distros ship it; but basically nobody uses it, it doesn't have
> to be fast. As long as we don't *break* it, everything's fine. And if
> we ignore the existence of X32 in the fastpath, that'll just mean that
> syscalls with the X32 marker bit always hit the seccomp slowpath
> (because it'll look like the syscall number is out-of-bounds ) - no
> problem.

You do realize that X32 is amd64 counterpart of mips n32, right? And that's
not "basically nobody uses it"...

 \ /
  Last update: 2020-09-25 02:19    [W:0.068 / U:0.744 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site