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bpf: add missing fsession to the verifier log

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The fsession attach type is missed in the verifier log in
check_get_func_ip(), bpf_check_attach_target() and check_attach_btf_id().
Update them to make the verifier log proper. Meanwhile, update the
corresponding selftests.

Acked-by: Leon Hwang <leon.hwang@linux.dev>
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20260412060346.142007-2-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Menglong Dong
2026-04-12 14:03:44 +08:00
committed by Alexei Starovoitov
parent 46ffc1f782
commit 9fd19e3ed7
3 changed files with 10 additions and 10 deletions
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10
kernel/bpf/verifier.c
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@@ -10152,7 +10152,7 @@ static int check_get_func_ip(struct bpf_verifier_env *env)
if (type == BPF_PROG_TYPE_TRACING) {
if (!bpf_prog_has_trampoline(env->prog)) {
verbose(env, "func %s#%d supported only for fentry/fexit/fmod_ret programs\n",
verbose(env, "func %s#%d supported only for fentry/fexit/fsession/fmod_ret programs\n",
func_id_name(func_id), func_id);
return -ENOTSUPP;
}
@@ -19135,7 +19135,7 @@ int bpf_check_attach_target(struct bpf_verifier_log *log,
btf = tgt_prog ? tgt_prog->aux->btf : prog->aux->attach_btf;
if (!btf) {
bpf_log(log,
"FENTRY/FEXIT program can only be attached to another program annotated with BTF\n");
"Tracing program can only be attached to another program annotated with BTF\n");
return -EINVAL;
}
t = btf_type_by_id(btf, btf_id);
@@ -19171,7 +19171,7 @@ int bpf_check_attach_target(struct bpf_verifier_log *log,
if (aux->func && aux->func[subprog]->aux->exception_cb) {
bpf_log(log,
"%s programs cannot attach to exception callback\n",
prog_extension ? "Extension" : "FENTRY/FEXIT");
prog_extension ? "Extension" : "Tracing");
return -EINVAL;
}
conservative = aux->func_info_aux[subprog].unreliable;
@@ -19260,7 +19260,7 @@ int bpf_check_attach_target(struct bpf_verifier_log *log,
case BPF_TRACE_RAW_TP:
if (tgt_prog) {
bpf_log(log,
"Only FENTRY/FEXIT progs are attachable to another BPF prog\n");
"Only FENTRY/FEXIT/FSESSION progs are attachable to another BPF prog\n");
return -EINVAL;
}
if (!btf_type_is_typedef(t)) {
@@ -19526,7 +19526,7 @@ static int check_attach_btf_id(struct bpf_verifier_env *env)
}
if (prog->sleepable && !can_be_sleepable(prog)) {
verbose(env, "Only fentry/fexit/fmod_ret, lsm, iter, uprobe, and struct_ops programs can be sleepable\n");
verbose(env, "Only fentry/fexit/fsession/fmod_ret, lsm, iter, uprobe, and struct_ops programs can be sleepable\n");
return -EINVAL;
}