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If the bpf program contains out of bound access w.r.t. a particular map key/value size, the verification will be still okay, e.g., it will be accepted by verifier. But it will be rejected during link_create time. A test is added here to ensure link_create failure did happen if out of bound access happened. $ ./test_progs -n 4 ... #4/23 rdonly-buf-out-of-bound:OK ... Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200723184124.591700-1-yhs@fb.com |
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| .. | ||
| benchs | ||
| gnu | ||
| map_tests | ||
| prog_tests | ||
| progs | ||
| verifier | ||
| .gitignore | ||
| bench.c | ||
| bench.h | ||
| bpf_legacy.h | ||
| bpf_rand.h | ||
| bpf_rlimit.h | ||
| bpf_tcp_helpers.h | ||
| bpf_util.h | ||
| cgroup_helpers.c | ||
| cgroup_helpers.h | ||
| config | ||
| flow_dissector_load.c | ||
| flow_dissector_load.h | ||
| get_cgroup_id_user.c | ||
| Makefile | ||
| netcnt_common.h | ||
| network_helpers.c | ||
| network_helpers.h | ||
| README.rst | ||
| tcp_client.py | ||
| tcp_server.py | ||
| test_bpftool.py | ||
| test_bpftool.sh | ||
| test_bpftool_build.sh | ||
| test_btf.c | ||
| test_btf.h | ||
| test_cgroup_storage.c | ||
| test_cpp.cpp | ||
| test_current_pid_tgid_new_ns.c | ||
| test_dev_cgroup.c | ||
| test_flow_dissector.c | ||
| test_flow_dissector.sh | ||
| test_ftrace.sh | ||
| test_iptunnel_common.h | ||
| test_kmod.sh | ||
| test_lirc_mode2.sh | ||
| test_lirc_mode2_user.c | ||
| test_lpm_map.c | ||
| test_lru_map.c | ||
| test_lwt_ip_encap.sh | ||
| test_lwt_seg6local.sh | ||
| test_maps.c | ||
| test_maps.h | ||
| test_netcnt.c | ||
| test_offload.py | ||
| test_progs.c | ||
| test_progs.h | ||
| test_select_reuseport_common.h | ||
| test_skb_cgroup_id.sh | ||
| test_skb_cgroup_id_user.c | ||
| test_sock.c | ||
| test_sock_addr.c | ||
| test_sock_addr.sh | ||
| test_sock_fields.c | ||
| test_socket_cookie.c | ||
| test_sockmap.c | ||
| test_stub.c | ||
| test_sysctl.c | ||
| test_tag.c | ||
| test_tc_edt.sh | ||
| test_tc_tunnel.sh | ||
| test_tcp_check_syncookie.sh | ||
| test_tcp_check_syncookie_user.c | ||
| test_tcpbpf.h | ||
| test_tcpbpf_user.c | ||
| test_tcpnotify.h | ||
| test_tcpnotify_user.c | ||
| test_tunnel.sh | ||
| test_verifier.c | ||
| test_verifier_log.c | ||
| test_xdp_meta.sh | ||
| test_xdp_redirect.sh | ||
| test_xdp_veth.sh | ||
| test_xdp_vlan.sh | ||
| test_xdp_vlan_mode_generic.sh | ||
| test_xdp_vlan_mode_native.sh | ||
| test_xdping.sh | ||
| testing_helpers.c | ||
| testing_helpers.h | ||
| trace_helpers.c | ||
| trace_helpers.h | ||
| urandom_read.c | ||
| with_addr.sh | ||
| with_tunnels.sh | ||
| xdping.c | ||
| xdping.h | ||
================== BPF Selftest Notes ================== General instructions on running selftests can be found in `Documentation/bpf/bpf_devel_QA.rst`_. Additional information about selftest failures are documented here. bpf_iter test failures with clang/llvm 10.0.0 ============================================= With clang/llvm 10.0.0, the following two bpf_iter tests failed: * ``bpf_iter/ipv6_route`` * ``bpf_iter/netlink`` The symptom for ``bpf_iter/ipv6_route`` looks like .. code-block:: c 2: (79) r8 = *(u64 *)(r1 +8) ... 14: (bf) r2 = r8 15: (0f) r2 += r1 ; BPF_SEQ_PRINTF(seq, "%pi6 %02x ", &rt->fib6_dst.addr, rt->fib6_dst.plen); 16: (7b) *(u64 *)(r8 +64) = r2 only read is supported The symptom for ``bpf_iter/netlink`` looks like .. code-block:: c ; struct netlink_sock *nlk = ctx->sk; 2: (79) r7 = *(u64 *)(r1 +8) ... 15: (bf) r2 = r7 16: (0f) r2 += r1 ; BPF_SEQ_PRINTF(seq, "%pK %-3d ", s, s->sk_protocol); 17: (7b) *(u64 *)(r7 +0) = r2 only read is supported This is due to a llvm BPF backend bug. The fix https://reviews.llvm.org/D78466 has been pushed to llvm 10.x release branch and will be available in 10.0.1. The fix is available in llvm 11.0.0 trunk.