Subject: Re: [PATCH v2] bpf: Add length check for SK_DIAG_BPF_STORAGE_REQ_MAP_FD parsing

From: Martin KaFai Lau <[email-masked]>
Date: Fri, 28 Jul 2023 16:57:43 -0700

On 7/27/23 12:34 AM, Paolo Abeni wrote:
> On Tue, 2023-07-25 at 10:33 +0800, Lin Ma wrote:
>> The nla_for_each_nested parsing in function bpf_sk_storage_diag_alloc
>> does not check the length of the nested attribute. This can lead to an
>> out-of-attribute read and allow a malformed nlattr (e.g., length 0) to
>> be viewed as a 4 byte integer.
>>
>> This patch adds an additional check when the nlattr is getting counted.
>> This makes sure the latter nla_get_u32 can access the attributes with
>> the correct length.
>>
>> Fixes: 1ed4d92458a9 ("bpf: INET_DIAG support in bpf_sk_storage")
>> Suggested-by: Jakub Kicinski <[email-masked]>
>> Signed-off-by: Lin Ma <[email-masked]>
> 
> I guess this should go via the ebpf tree, right? Setting the delegate
> accordingly.

Already applied to the bpf tree. Thanks.
pw-bot seems not doing auto-reply for the bpf tree.