diff options
Diffstat (limited to 'tools/testing/selftests/bpf/verifier/calls.c')
| -rw-r--r-- | tools/testing/selftests/bpf/verifier/calls.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/verifier/calls.c b/tools/testing/selftests/bpf/verifier/calls.c index 18596ae0b0c1..f3492efc8834 100644 --- a/tools/testing/selftests/bpf/verifier/calls.c +++ b/tools/testing/selftests/bpf/verifier/calls.c @@ -2409,3 +2409,27 @@ .errstr_unpriv = "", .prog_type = BPF_PROG_TYPE_CGROUP_SKB, }, +{ + "calls: several args with ref_obj_id", + .insns = { + /* Reserve at least sizeof(struct iphdr) bytes in the ring buffer. + * With a smaller size, the verifier would reject the call to + * bpf_tcp_raw_gen_syncookie_ipv4 before we can reach the + * ref_obj_id error. + */ + BPF_MOV64_IMM(BPF_REG_2, 20), + BPF_MOV64_IMM(BPF_REG_3, 0), + BPF_LD_MAP_FD(BPF_REG_1, 0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_ringbuf_reserve), + /* if r0 == 0 goto <exit> */ + BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 3), + BPF_MOV64_REG(BPF_REG_1, BPF_REG_0), + BPF_MOV64_REG(BPF_REG_2, BPF_REG_0), + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_tcp_raw_gen_syncookie_ipv4), + BPF_EXIT_INSN(), + }, + .fixup_map_ringbuf = { 2 }, + .result = REJECT, + .errstr = "more than one arg with ref_obj_id", + .prog_type = BPF_PROG_TYPE_SCHED_CLS, +}, |