[ofa-general] [PATCH] IB/IPoIB: Don't let a bad muticast address in the join list stop subsequent joins

[Moni Shoua]

Moni Shoua wrote:
Sorry, previous message was sent by mistake to myself with others on CC

> Roland,
> With Jason's example of corrupting mcast list of IPoIB from userspace, what do you think about the necessity of the patch?
> 
> Moni Shoua wrote:
>>>> Is there any way userspace can inject a bogus multicast address?
>>> Can you do it with netlink?
>>>
>>> ip maddr add address ... dev ib0  
>>>
>>> Jason
>> Thanks Jason. This is an example that shows it can be done from userspace.
>> Roland, I think that the output below answers your question.
>>
>>
>> Before ip maddr show
>> -------------------------------
>> linux:/etc/sysconfig/network # ip m s dev ib0
>> 9:      ib0
>>         link  00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:01:00:00:00:00
>>         link  00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:00
>>         link  00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:00:00:00:00:00
>>         inet  224.0.0.1
>>         inet6 ff02::1:ff96:ca05
>>         inet6 ff02::1
>>
>> linux:/etc/sysconfig/network # ip maddr add 33:33:00:00:00:01 dev ib0
>> linux:/etc/sysconfig/network # ip m s dev ib0
>>
>> Before ip maddr show
>> -------------------------------
>> 9:      ib0
>>         link  33:33:00:00:00:01:00:00:00:00:00:00:00:00:00:00:00:00:00:00 static
>>         link  00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:01:00:00:00:00
>>         link  00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:00:00:00:00
>>         link  00:ff:ff:ff:ff:12:60:1b:ff:ff:00:00:00:00:00:00:00:00:00:00
>>         inet  224.0.0.1
>>         inet6 ff02::1:ff96:ca05
>>         inet6 ff02::1
>>
>> >From dmesg (22 means EINVAL)
>> -------------------------------
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
>> ib0: multicast join failed for 0001:0000:0000:0000:0000:0000:0000:0000, status -22
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