diff options
| author | Anton Protopopov <a.s.protopopov@gmail.com> | 2025-08-16 15:15:54 +0000 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2025-08-18 17:27:01 +0200 |
| commit | dbe99ea541f023d73abf5730c1477ba96111ef83 (patch) | |
| tree | e75a0956e34164ee7484262d37b24c7b0af61a66 | |
| parent | d87fdb1f27d7b1f3309bba00955f0aa1cd19b33e (diff) | |
bpf: Add a verbose message when the BTF limit is reached
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.
Reported-by: Kevin Sheldrake <kevin.sheldrake@isovalent.com>
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20250816151554.902995-1-a.s.protopopov@gmail.com
| -rw-r--r-- | kernel/bpf/verifier.c | 5 |
1 files changed, 4 insertions, 1 deletions
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); |