diff options
| author | Brendan Jackman <jackmanb@google.com> | 2021-01-14 18:17:45 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-01-14 18:34:29 -0800 |
| commit | c5bcb5eb4db632280b4123135d583a7bc8caea3e (patch) | |
| tree | 220bf8ea301e5c89fa22fc74fa1e3ba854378c0f | |
| parent | 91c960b0056672e74627776655c926388350fa30 (diff) | |
| download | linux-c5bcb5eb4db632280b4123135d583a7bc8caea3e.tar.bz2 | |
bpf: Move BPF_STX reserved field check into BPF_STX verifier code
I can't find a reason why this code is in resolve_pseudo_ldimm64;
since I'll be modifying it in a subsequent commit, tidy it up.
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20210114181751.768687-6-jackmanb@google.com
| -rw-r--r-- | kernel/bpf/verifier.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index cfc137b81ac6..d8a85f4e5b95 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -9528,6 +9528,12 @@ static int do_check(struct bpf_verifier_env *env) } else if (class == BPF_STX) { enum bpf_reg_type *prev_dst_type, dst_reg_type; + if (((BPF_MODE(insn->code) != BPF_MEM && + BPF_MODE(insn->code) != BPF_ATOMIC) || insn->imm != 0)) { + verbose(env, "BPF_STX uses reserved fields\n"); + return -EINVAL; + } + if (BPF_MODE(insn->code) == BPF_ATOMIC) { err = check_atomic(env, env->insn_idx, insn); if (err) @@ -10012,13 +10018,6 @@ static int resolve_pseudo_ldimm64(struct bpf_verifier_env *env) return -EINVAL; } - if (BPF_CLASS(insn->code) == BPF_STX && - ((BPF_MODE(insn->code) != BPF_MEM && - BPF_MODE(insn->code) != BPF_ATOMIC) || insn->imm != 0)) { - verbose(env, "BPF_STX uses reserved fields\n"); - return -EINVAL; - } - if (insn[0].code == (BPF_LD | BPF_IMM | BPF_DW)) { struct bpf_insn_aux_data *aux; struct bpf_map *map; |