From: Alexei Starovoitov <ast@plumgrid.com>
Date: Mon, 1 Dec 2014 23:06:34 +0000 (-0800)
Subject: bpf: verifier: add checks for BPF_ABS | BPF_IND instructions
X-Git-Tag: omap-for-v3.20/drop-legacy-3517~122^2~93^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddd872bc3098f9d9abe1680a6b2013e59e3337f7;p=pandora-kernel.git

bpf: verifier: add checks for BPF_ABS | BPF_IND instructions

introduce program type BPF_PROG_TYPE_SOCKET_FILTER that is used
for attaching programs to sockets where ctx == skb.

add verifier checks for ABS/IND instructions which can only be seen
in socket filters, therefore the check:
  if (env->prog->aux->prog_type != BPF_PROG_TYPE_SOCKET_FILTER)
    verbose("BPF_LD_ABS|IND instructions are only allowed in socket filters\n");

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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