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0254e0c632
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 <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.