Re: [dpdk-dev] [PATCH] bonding: fix overflow check

["Min Hu (Connor)" <humin29@huawei.com>]

在 2021/4/26 23:08, Ferruh Yigit 写道:
> On 4/22/2021 10:22 AM, Min Hu (Connor) wrote:
>> Buffer 'test_params->slave_port_ids' of size 6 accessed may
>> overflow, since its index 'i' can have value be is out of range.
>>
>> This patch fixed it.
>>
>> Fixes: 92073ef961ee ("bond: unit tests")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
>> ---
>>   app/test/test_link_bonding.c | 3 ++-
>>   1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/app/test/test_link_bonding.c b/app/test/test_link_bonding.c
>> index 8a5c831..b5a6042 100644
>> --- a/app/test/test_link_bonding.c
>> +++ b/app/test/test_link_bonding.c
>> @@ -2216,7 +2216,8 @@ test_activebackup_rx_burst(void)
>>   			"failed to get primary slave for bonded port (%d)",
>>   			test_params->bonded_port_id);
>>   
>> -	for (i = 0; i < test_params->bonded_slave_count; i++) {
>> +	for (i = 0; i < test_params->bonded_slave_count &&
>> +		i < TEST_MAX_NUMBER_OF_PORTS; i++) {
>>   		/* Generate test bursts of packets to transmit */
>>   		TEST_ASSERT_EQUAL(generate_test_burst(
>>   				&gen_pkt_burst[0], burst_size, 0, 1, 0, 0, 0),
>>
> 
> Hi Connor,
> 
> There is nothing wrong with the check you add, but at first place how
> 'test_params->bonded_slave_count' can become bigger than
> 'TEST_MAX_NUMBER_OF_PORTS'? Should we fix there, instead of this loop?
> 
> Also in same function, there are a few more loops iterate until " <
> test_params->bonded_slave_count", so fixing the root case works for them too.
> 
Hi, fixed in v2, thanks.
>