diff options
| author | Edward Cree <ecree@solarflare.com> | 2017-09-15 14:37:38 +0100 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-11-05 23:54:28 -0500 |
| commit | d9d3b7bd44f88b31937d4db1cd35e35c839f4f7e (patch) | |
| tree | 620a86ea68438a74b1b831b6678368b757f958b1 /kernel | |
| parent | 705cb86401287e89c802f3a3854ad255f9407a9c (diff) | |
bpf/verifier: reject BPF_ALU64|BPF_END
[ Upstream commit e67b8a685c7c984e834e3181ef4619cd7025a136 ]
Neither ___bpf_prog_run nor the JITs accept it.
Also adds a new test case.
Fixes: 17a5267067f3 ("bpf: verifier (add verifier core)")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/verifier.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index efd143dcedf1..1bdc6f910a1d 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -926,7 +926,8 @@ static int check_alu_op(struct reg_state *regs, struct bpf_insn *insn) } } else { if (insn->src_reg != BPF_REG_0 || insn->off != 0 || - (insn->imm != 16 && insn->imm != 32 && insn->imm != 64)) { + (insn->imm != 16 && insn->imm != 32 && insn->imm != 64) || + BPF_CLASS(insn->code) == BPF_ALU64) { verbose("BPF_END uses reserved fields\n"); return -EINVAL; } |