On Fri, Mar 29, 2024 at 12:18 AM Anton Protopopov <aspsk@xxxxxxxxxxxxx> wrote:
>
> When more than 64 maps are used by a program the verifier return -E2BIG.
> Add a verbose message which highlights the error and also prints the
> actual limit.
>
> Signed-off-by: Anton Protopopov <aspsk@xxxxxxxxxxxxx>
> ---
> kernel/bpf/verifier.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index 58952f040761..fa73009d05bc 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -18348,6 +18348,8 @@ static int resolve_pseudo_ldimm64(struct bpf_verifier_env *env)
> }
>
> if (env->used_map_cnt >= MAX_USED_MAPS) {
> + verbose(env, "The map usage limit of %u is reached\n",
> + MAX_USED_MAPS);
"map usage limit" reads as "number of times the map was used".
Please make it clear that it's the total number of maps
used by a program and its subprograms.
pw-bot: cr
