| Message ID | 20240917085024.765883-6-jolsa@kernel.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | uprobe, bpf: Add session support | expand |
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index d8520095ca03..988858fc37e5 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -15668,6 +15668,16 @@ static int check_return_code(struct bpf_verifier_env *env, int regno, const char return -ENOTSUPP; } break; + case BPF_PROG_TYPE_KPROBE: + switch (env->prog->expected_attach_type) { + case BPF_TRACE_KPROBE_SESSION: + case BPF_TRACE_UPROBE_SESSION: + range = retval_range(0, 1); + break; + default: + return 0; + } + break; case BPF_PROG_TYPE_SK_LOOKUP: range = retval_range(SK_DROP, SK_PASS); break;
The uprobe and kprobe session program can return only 0 or 1, instruct verifier to check for that. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- kernel/bpf/verifier.c | 10 ++++++++++ 1 file changed, 10 insertions(+)