From: "Robert Święcki" <robert@swiecki.net>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
Will Drewry <wad@chromium.org>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH 0/3] signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
Date: Fri, 11 Feb 2022 19:57:02 +0100 [thread overview]
Message-ID: <CAP145pii+zCyoQBw778P-Jw9YSOWhQEgB7OTHUaRwfGy7BYWCA@mail.gmail.com> (raw)
In-Reply-To: <87a6ex1ek2.fsf@email.froward.int.ebiederm.org>
pt., 11 lut 2022 o 18:47 Eric W. Biederman <ebiederm@xmission.com> napisał(a):
> > I think it'd be good to have some way of doing it from the perspective
> > of a parent process - it'd simplify development of sandboxing managers
> > (eg nsjail, minijail, firejail), and creation of good seccomp
> > policies.
>
> By development do you mean debugging sandbox managers? Or do you mean
> something that sandbox managers can use on a routine basis?
On a routine basis for 2 purposes
a). development of seccomp policies - the manager (regular parent of
sandboxed process) can tell which syscall (and arguments) failed and
it can be then added to policy (though, 'strace -f -c' might be a
better option here)
b). in case of actual seccomp SIGSYS kill, it could then inform users
about what exactly and where happened (syscall no, cpu arch,
arguments, maybe also eip + stack ptr)
But, I don't want to derail the current bug fixing effort, so I just
wanted to mention all of this quickly, and maybe we can follow up on
this in the future.
next prev parent reply other threads:[~2022-02-11 18:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-10 2:53 [PATCH 0/3] signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE Kees Cook
2022-02-10 2:53 ` [PATCH 1/3] " Kees Cook
2022-02-10 16:18 ` Jann Horn
2022-02-10 17:37 ` Kees Cook
2022-02-10 18:01 ` Jann Horn
2022-02-10 18:12 ` Eric W. Biederman
2022-02-10 21:09 ` Kees Cook
2022-02-11 20:15 ` Jann Horn
2022-02-10 18:16 ` Eric W. Biederman
2022-02-10 2:53 ` [PATCH 2/3] seccomp: Invalidate seccomp mode to catch death failures Kees Cook
2022-02-10 2:53 ` [PATCH 3/3] samples/seccomp: Adjust sample to also provide kill option Kees Cook
2022-02-10 18:17 ` [PATCH 0/3] signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE Eric W. Biederman
2022-02-10 18:41 ` Kees Cook
2022-02-10 18:58 ` Eric W. Biederman
2022-02-10 20:43 ` Kees Cook
2022-02-10 22:48 ` Eric W. Biederman
2022-02-11 1:26 ` Kees Cook
2022-02-11 1:47 ` Eric W. Biederman
2022-02-11 2:53 ` Kees Cook
2022-02-11 12:54 ` Robert Święcki
2022-02-11 17:46 ` Eric W. Biederman
2022-02-11 18:57 ` Robert Święcki [this message]
2022-02-11 20:01 ` Kees Cook
2022-02-11 19:58 ` Kees Cook
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