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From: Alexei Starovoitov <ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
To: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>
Cc: Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
	Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Hannes Frederic Sowa
	<hannes-tFNcAqjVMyqKXQKiL6tip0B+6BGkLq7r@public.gmane.org>,
	Eric Dumazet <edumazet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Daniel Borkmann <daniel-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>,
	Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH net-next 1/2] bpf: enable non-root eBPF programs
Date: Wed, 7 Oct 2015 19:29:16 -0700	[thread overview]
Message-ID: <5615D4FC.1010706@plumgrid.com> (raw)
In-Reply-To: <1444078101-29060-2-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>

On 10/5/15 1:48 PM, Alexei Starovoitov wrote:
> Unprivileged socket filter bpf programs have access to the
> following helper functions:
> - map lookup/update/delete (but they cannot store kernel pointers into them)
> - get_random (it's already exposed to unprivileged user space)
> - get_smp_processor_id
> - tail_call into another socket filter program
> - ktime_get_ns
> - bpf_trace_printk (for debugging)

while reviewing everything for Nth time realized that
bpf_trace_printk is useless for unprivileged users, since
trace_pipe is root only.
So going to drop it in V2.

  parent reply	other threads:[~2015-10-08  2:29 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-10-05 20:48 [PATCH net-next 0/2] bpf: unprivileged Alexei Starovoitov
2015-10-05 20:48 ` [PATCH net-next 1/2] bpf: enable non-root eBPF programs Alexei Starovoitov
     [not found]   ` <1444078101-29060-2-git-send-email-ast-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-05 21:00     ` Kees Cook
2015-10-05 21:12       ` Alexei Starovoitov
     [not found]         ` <5612E7C4.1010306-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-05 21:16           ` Andy Lutomirski
2015-10-05 21:32             ` Alexei Starovoitov
2015-10-05 22:02         ` Kees Cook
2015-10-06  0:28           ` Alexei Starovoitov
2015-10-08  2:29     ` Alexei Starovoitov [this message]
2015-10-05 22:14   ` Daniel Borkmann
     [not found]     ` <5612F639.2050305-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>
2015-10-06  0:51       ` Alexei Starovoitov
     [not found]         ` <56131B1F.80002-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-06  7:13           ` Ingo Molnar
2015-10-06  8:05             ` Daniel Borkmann
2015-10-06  8:20               ` Ingo Molnar
     [not found]                 ` <20151006082048.GA18287-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-10-06  8:39                   ` Daniel Borkmann
     [not found]                     ` <561388D1.30406-FeC+5ew28dpmcu3hnIyYJQ@public.gmane.org>
2015-10-06 17:50                       ` Alexei Starovoitov
2015-10-06 17:56                         ` Eric Dumazet
     [not found]                           ` <1444154160.9555.5.camel-XN9IlZ5yJG9HTL0Zs8A6p/gx64E7kk8eUsxypvmhUTTZJqsBc5GL+g@public.gmane.org>
2015-10-06 18:05                             ` Andy Lutomirski
2015-10-07  6:05                               ` Ingo Molnar
2015-10-06 19:26                           ` Alexei Starovoitov
     [not found]                         ` <561409EC.5050005-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-06 18:03                           ` Daniel Borkmann
2015-10-06 12:45           ` Daniel Borkmann
2015-10-07 21:20             ` Alexei Starovoitov
     [not found]               ` <56158CAF.9030209-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-07 22:07                 ` Daniel Borkmann
2015-10-07 22:22                   ` Kees Cook
2015-10-07 23:49                     ` Alexei Starovoitov
     [not found]                       ` <5615AF92.50402-uqk4Ao+rVK5Wk0Htik3J/w@public.gmane.org>
2015-10-08  6:21                         ` Ingo Molnar
2015-10-08  6:30                           ` Alexei Starovoitov
2015-10-08 17:42                       ` Kees Cook
2015-10-05 20:48 ` [PATCH net-next 2/2] bpf: charge user for creation of BPF maps and programs Alexei Starovoitov

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