diff options
| -rw-r--r-- | tools/bpf/resolve_btfids/main.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index 338d0c0a8e58..85488935909d 100644 --- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -982,17 +982,26 @@ static int push_kfunc(struct btf2btf_context *ctx, struct kfunc *kfunc) struct rb_node *parent = NULL; struct kfunc *k; - /* Dedup by BTF ID: collecting the same kfunc twice is a no-op. */ + /* + * Dedup by BTF ID: collecting the same kfunc twice is a no-op, + * UNLESS the kfunc flags are inconsistent, in which case we + * fail hard because it indicates a bug in a kfunc set declaration. + */ while (*p) { parent = *p; k = rb_entry(parent, struct kfunc, rb_node); - if (kfunc->btf_id < k->btf_id) + if (kfunc->btf_id < k->btf_id) { p = &(*p)->rb_left; - else if (kfunc->btf_id > k->btf_id) + } else if (kfunc->btf_id > k->btf_id) { p = &(*p)->rb_right; - else + } else if (k->flags == kfunc->flags) { return 0; + } else { + pr_err("ERROR: resolve_btfids: kfunc %s has inconsistent flags across BTF ID sets: 0x%x != 0x%x\n", + kfunc->name, k->flags, kfunc->flags); + return -EINVAL; + } } k = zalloc(sizeof(*k)); |