[PATCH] ip maddr show” on an infiniband address causes a stack corruption

Hi,

“ip maddr show” on an infiniband address causes a stack corruption 
because the length of the address for Infiniband (20 bytes, as 
described in kernel doc Documentation/infiniband/ipoib.txt) does not 
fit on the 16 bytes of the field in which it gets stored.

The proposed patch increases the size of the hardware address from 4 
__u32 to 8 and also adds a check to avoid overriding the available 
size while parsing the hardware address.

This bug affects current upstream code AFAICT.

Hope this helps,
Cheers,
Olivier.