From: Cong Wang <xiyou.wangc...@gmail.com> Date: Wed, 26 Jul 2017 15:22:06 -0700
> Historically, dev_ifsioc() uses struct sockaddr as mac > address definition, this is why dev_set_mac_address() > accepts a struct sockaddr pointer as input but now we > have various types of mac addresse whose lengths > are up to MAX_ADDR_LEN, longer than struct sockaddr, > and saved in dev->addr_len. > > It is too late to fix dev_ifsioc() due to API > compatibility, so just reject those larger than > sizeof(struct sockaddr), otherwise we would read > and use some random bytes from kernel stack. > > Fortunately, only a few IPv6 tunnel devices have addr_len > larger than sizeof(struct sockaddr) and they don't support > ndo_set_mac_addr(). But with team driver, in lb mode, they > can still be enslaved to a team master and make its mac addr > length as the same. > > Cc: Jiri Pirko <j...@resnulli.us> > Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com> Applied.
