Re: [PATCH v3 bpf-next 2/6] libbpf: Adjust btf_vlen() to return a __u32

Alan Maguire
2026-04-20T16:07:13Z

On 20/04/2026 16:39, Alexei Starovoitov wrote:
> On Mon Apr 20, 2026 at 1:02 AM PDT, Alan Maguire wrote:
>> - return sizeof(struct btf_type) + l[kind].info_sz + vlen * l[kind].elem_sz;
>> + type_size = sizeof(struct btf_type) + l[kind].info_sz + vlen * l[kind].elem_sz;
>> + if ((size_t)type_size > (size_t)(end_type - (const void *)t)) {
>> + pr_debug("Overflow in type size %d for kind %u\n",
>> + type_size, kind);
>> + return -EINVAL;
>> + }
>> + return type_size;
>> }
>>
>> Given that this problem exists separate from the extended vlen series, might make more
>> sense to send a separate patch targeting the bpf tree for this issue.
>
> Make sense to me. Use check_add_overflow() when you do.
> Are you still planning to respin the set ? or is it good to go?
>

I think it's good to go; I'll send an official bpf-targeted patch for the above with Fixes: tag.
Thanks!