From b93c2b916e462e344e7fca7340d001bed72443ef Mon Sep 17 00:00:00 2001 From: Hoyeon Lee Date: Wed, 1 Apr 2026 23:29:29 +0900 Subject: [PATCH] libbpf: Use direct error codes for kprobe/uprobe attach perf_event_open_probe() and perf_event_{k,u}probe_open_legacy() helpers are returning negative error codes directly on failure. This commit changes bpf_program__attach_{k,u}probe_opts() to use those return values directly instead of re-reading possibly changed errno. Signed-off-by: Hoyeon Lee Signed-off-by: Andrii Nakryiko Acked-by: Jiri Olsa Link: https://lore.kernel.org/bpf/20260401143116.185049-2-hoyeon.lee@suse.com --- src/libbpf.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/libbpf.c b/src/libbpf.c index 5890854..d9c678e 100644 --- a/src/libbpf.c +++ b/src/libbpf.c @@ -11862,7 +11862,7 @@ bpf_program__attach_kprobe_opts(const struct bpf_program *prog, offset, -1 /* pid */); } if (pfd < 0) { - err = -errno; + err = pfd; pr_warn("prog '%s': failed to create %s '%s+0x%zx' perf event: %s\n", prog->name, retprobe ? "kretprobe" : "kprobe", func_name, offset, @@ -12852,7 +12852,7 @@ bpf_program__attach_uprobe_opts(const struct bpf_program *prog, pid_t pid, binary_path, func_offset, pid); } if (pfd < 0) { - err = -errno; + err = pfd; pr_warn("prog '%s': failed to create %s '%s:0x%zx' perf event: %s\n", prog->name, retprobe ? "uretprobe" : "uprobe", binary_path, func_offset,