| Message ID | 20241108134544.480660-2-jolsa@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Masami Hiramatsu |
| Headers | show |
| Series | bpf: Add uprobe session support | expand |
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 7958d6ff6b73..7d8ed377b35d 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -16024,6 +16024,15 @@ 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: + 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 kprobe session program can return only 0 or 1, instruct verifier to check for that. Fixes: 535a3692ba72 ("bpf: Add support for kprobe session attach") Acked-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- kernel/bpf/verifier.c | 9 +++++++++ 1 file changed, 9 insertions(+)