bpf_probe_read is deprecated and ambiguous. Add a warning if programs still use it, so that they may be moved to not use it. After sufficient time, the warning can be removed.
Signed-off-by: Joel Fernandes (Google) <[email protected]> --- kernel/bpf/verifier.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 09d5d972c9ff..f8cc77e85b48 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -7656,6 +7656,10 @@ static int fixup_bpf_calls(struct bpf_verifier_env *env) if (insn->src_reg == BPF_PSEUDO_CALL) continue; + if (insn->imm == BPF_FUNC_probe_read) + pr_warn_once("bpf_probe_read is deprecated, please use " + "bpf_probe_read_{kernel,user} in eBPF programs.\n"); + if (insn->imm == BPF_FUNC_get_route_realm) prog->dst_needed = 1; if (insn->imm == BPF_FUNC_get_prandom_u32) -- 2.21.0.1020.gf2820cf01a-goog
