diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_ctx.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_ctx.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_ctx.c b/tools/testing/selftests/bpf/progs/verifier_ctx.c index a83809a1dbbf..0450840c92d9 100644 --- a/tools/testing/selftests/bpf/progs/verifier_ctx.c +++ b/tools/testing/selftests/bpf/progs/verifier_ctx.c @@ -218,4 +218,29 @@ __naked void null_check_8_null_bind(void) : __clobber_all); } +#define narrow_load(type, ctx, field) \ + SEC(type) \ + __description("narrow load on field " #field " of " #ctx) \ + __failure __msg("invalid bpf_context access") \ + __naked void invalid_narrow_load##ctx##field(void) \ + { \ + asm volatile (" \ + r1 = *(u32 *)(r1 + %[off]); \ + r0 = 0; \ + exit;" \ + : \ + : __imm_const(off, offsetof(struct ctx, field) + 4) \ + : __clobber_all); \ + } + +narrow_load("cgroup/getsockopt", bpf_sockopt, sk); +narrow_load("cgroup/getsockopt", bpf_sockopt, optval); +narrow_load("cgroup/getsockopt", bpf_sockopt, optval_end); +narrow_load("tc", __sk_buff, sk); +narrow_load("cgroup/bind4", bpf_sock_addr, sk); +narrow_load("sockops", bpf_sock_ops, sk); +narrow_load("sockops", bpf_sock_ops, skb_data); +narrow_load("sockops", bpf_sock_ops, skb_data_end); +narrow_load("sockops", bpf_sock_ops, skb_hwtstamp); + char _license[] SEC("license") = "GPL"; |