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| author | Daniel Borkmann <daniel@iogearbox.net> | 2017-01-12 11:51:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-12 10:00:31 -0500 |
| commit | 6b8cc1d11ef75c5b9c530b3d0d148f3c2dd25f93 (patch) | |
| tree | 36f8bae922c1f926d8b34a489fc7e34064dedd76 /kernel/bpf | |
| parent | f811b436522d3b9c05302f1785aba61829938a54 (diff) | |
| download | linux-6b8cc1d11ef75c5b9c530b3d0d148f3c2dd25f93.tar.bz2 | |
bpf: pass original insn directly to convert_ctx_access
Currently, when calling convert_ctx_access() callback for the various
program types, we pass in insn->dst_reg, insn->src_reg, insn->off from
the original instruction. This information is needed to rewrite the
instruction that is based on the user ctx structure into a kernel
representation for the ctx. As we'd like to allow access size beyond
just BPF_W, we'd need also insn->code for that in order to decode the
original access size. Given that, lets just pass insn directly to the
convert_ctx_access() callback and work on that to not clutter the
callback with even more arguments we need to pass when everything is
already contained in insn. So lets go through that once, no functional
change.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/verifier.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 2efdc9128e3c..df7e47244e75 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -3177,8 +3177,7 @@ static int convert_ctx_accesses(struct bpf_verifier_env *env) if (env->insn_aux_data[i].ptr_type != PTR_TO_CTX) continue; - cnt = ops->convert_ctx_access(type, insn->dst_reg, insn->src_reg, - insn->off, insn_buf, env->prog); + cnt = ops->convert_ctx_access(type, insn, insn_buf, env->prog); if (cnt == 0 || cnt >= ARRAY_SIZE(insn_buf)) { verbose("bpf verifier is misconfigured\n"); return -EINVAL; |