Re: [PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-11 Thread peterz
On Fri, Sep 04, 2020 at 04:31:44PM -0400, Gabriel Krisman Bertazi wrote: > Syscall User Dispatch (SUD) must take precedence over seccomp, since the > use case is emulation (it can be invoked with a different ABI) such that > seccomp filtering by syscall number doesn't make sense in the first > plac

Re: [PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-07 Thread Andy Lutomirski
On Mon, Sep 7, 2020 at 7:25 AM Christian Brauner wrote: > > On Mon, Sep 07, 2020 at 07:15:52AM -0700, Andy Lutomirski wrote: > > > > > > > On Sep 7, 2020, at 3:15 AM, Christian Brauner > > > wrote: > > > > > > On Fri, Sep 04, 2020 at 04:31:44PM -0400, Gabriel Krisman Bertazi wrote: > > >> Sysca

Re: [PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-07 Thread Andy Lutomirski
> On Sep 7, 2020, at 3:15 AM, Christian Brauner > wrote: > > On Fri, Sep 04, 2020 at 04:31:44PM -0400, Gabriel Krisman Bertazi wrote: >> Syscall User Dispatch (SUD) must take precedence over seccomp, since the >> use case is emulation (it can be invoked with a different ABI) such that >> sec

Re: [PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-07 Thread Christian Brauner
On Mon, Sep 07, 2020 at 07:15:52AM -0700, Andy Lutomirski wrote: > > > > On Sep 7, 2020, at 3:15 AM, Christian Brauner > > wrote: > > > > On Fri, Sep 04, 2020 at 04:31:44PM -0400, Gabriel Krisman Bertazi wrote: > >> Syscall User Dispatch (SUD) must take precedence over seccomp, since the > >>

Re: [PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-07 Thread Christian Brauner
On Fri, Sep 04, 2020 at 04:31:44PM -0400, Gabriel Krisman Bertazi wrote: > Syscall User Dispatch (SUD) must take precedence over seccomp, since the > use case is emulation (it can be invoked with a different ABI) such that > seccomp filtering by syscall number doesn't make sense in the first > plac

[PATCH v6 6/9] kernel: entry: Support Syscall User Dispatch for common syscall entry

2020-09-04 Thread Gabriel Krisman Bertazi
Syscall User Dispatch (SUD) must take precedence over seccomp, since the use case is emulation (it can be invoked with a different ABI) such that seccomp filtering by syscall number doesn't make sense in the first place. In addition, either the syscall is dispatched back to userspace, in which cas