When a BPF program which is being loaded reaches the map limit
(MAX_USED_MAPS) or the BTF limit (MAX_USED_BTFS) the -E2BIG is
returned. However, in the former case there is an accompanying
verifier verbose message, and in the latter case there is not.
Add a verbose message to make the behaviour symmetrical.
Signed-off-by: Anton Protopopov <a.s.protopopov@xxxxxxxxx>
---
kernel/bpf/verifier.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 3a3982fe20d4..07cc4a738c67 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -20193,8 +20193,11 @@ static int __add_used_btf(struct bpf_verifier_env *env, struct btf *btf)
if (env->used_btfs[i].btf == btf)
return i;
- if (env->used_btf_cnt >= MAX_USED_BTFS)
+ if (env->used_btf_cnt >= MAX_USED_BTFS) {
+ verbose(env, "The total number of btfs per program has reached the limit of %u\n",
+ MAX_USED_BTFS);
return -E2BIG;
+ }
btf_get(btf);
--
2.34.1
