Re: [PATCH bpf 5/9] bpf: Check the validity of max_rdwr_access for sk storage map iterator

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Hi,

On 8/10/2022 2:46 AM, Martin KaFai Lau wrote:
> On Sat, Aug 06, 2022 at 03:40:15PM +0800, Hou Tao wrote:
>> From: Hou Tao <houtao1@xxxxxxxxxx>
>>
>> The value of sock map is writable in map iterator, so check
> Not a sock map.  It is a sk local storage map.
Will update in v2. Thanks.
>
>> max_rdwr_access instead of max_rdonly_access.
>>
>> Fixes: 5ce6e77c7edf ("bpf: Implement bpf iterator for sock local storage map")
>> Signed-off-by: Hou Tao <houtao1@xxxxxxxxxx>
>> ---
>>  net/core/bpf_sk_storage.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/core/bpf_sk_storage.c b/net/core/bpf_sk_storage.c
>> index 83b89ba824d7..1b7f385643b4 100644
>> --- a/net/core/bpf_sk_storage.c
>> +++ b/net/core/bpf_sk_storage.c
>> @@ -904,7 +904,7 @@ static int bpf_iter_attach_map(struct bpf_prog *prog,
>>  	if (map->map_type != BPF_MAP_TYPE_SK_STORAGE)
>>  		goto put_map;
>>  
>> -	if (prog->aux->max_rdonly_access > map->value_size) {
>> +	if (prog->aux->max_rdwr_access > map->value_size) {
>>  		err = -EACCES;
>>  		goto put_map;
>>  	}
>> -- 
>> 2.29.2
>>




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