diff options
| author | Edward Cree <ecree@solarflare.com> | 2017-09-15 13:37:38 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-12 09:51:20 (GMT) |
| commit | e159492b3c3edeffb9cbfb449efb5e7adfb719f7 (patch) | |
| tree | a4e02585b3e887ec1362b09ee08a1f6431490c1c /kernel | |
| parent | 186a9c5e7038d7e6b39d2f6c96f71056b1bacd8d (diff) | |
| download | linux-e159492b3c3edeffb9cbfb449efb5e7adfb719f7.tar.xz | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 779c871..372454a 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1720,7 +1720,8 @@ static int check_alu_op(struct bpf_verifier_env *env, 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; } |