diff options
| -rw-r--r-- | lib/test_bpf.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index f8d2b2a..ea60ad8 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -158,6 +158,18 @@ static struct bpf_test tests[] = { { { 0, 0x800000ff }, { 1, 0x800000ff } }, }, { + "LD_IMM_0", + .u.insns = { + BPF_STMT(BPF_LD | BPF_IMM, 0), /* ld #0 */ + BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, 1, 0), + BPF_STMT(BPF_RET | BPF_K, 0), + BPF_STMT(BPF_RET | BPF_K, 1), + }, + CLASSIC, + { }, + { { 1, 1 } }, + }, + { "LD_IND", .u.insns = { BPF_STMT(BPF_LDX | BPF_LEN, 0), @@ -1734,12 +1746,11 @@ static int probe_filter_length(struct sock_filter *fp) { int len = 0; - while (fp->code != 0 || fp->k != 0) { - fp++; - len++; - } + for (len = MAX_INSNS - 1; len > 0; --len) + if (fp[len].code != 0 || fp[len].k != 0) + break; - return len; + return len + 1; } static struct sk_filter *generate_filter(int which, int *err) |