diff options
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 84b6fb47a2f7..3baa6025ecba 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -11826,7 +11826,7 @@ error: static int attach_kprobe(const struct bpf_program *prog, long cookie, struct bpf_link **link) { DECLARE_LIBBPF_OPTS(bpf_kprobe_opts, opts); - unsigned long offset = 0; + long offset = 0; const char *func_name; char *func; int n; @@ -11848,6 +11848,13 @@ static int attach_kprobe(const struct bpf_program *prog, long cookie, struct bpf pr_warn("kprobe name is invalid: %s\n", func_name); return -EINVAL; } + + if (offset < 0) { + free(func); + pr_warn("kprobe offset must be a non-negative integer: %li\n", offset); + return -EINVAL; + } + if (opts.retprobe && offset != 0) { free(func); pr_warn("kretprobes do not support offset specification\n"); |