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In asix_rx_fixup_internal() there is a risk that rx->ax_skb gets reused after passing the Ethernet frame into the network stack via usbnet_skb_return(). The risks include: a) asynchronously freeing rx->ax_skb after passing the netdev buffer to the NAPI layer which might corrupt the backlog queue. b) erroneously reusing rx->ax_skb such as calling skb_put_data() multiple times which causes writing off the end of the netdev buffer. Therefore add a defensive rx->ax_skb = NULL after usbnet_skb_return() so that it is not possible to free rx->ax_skb or to apply skb_put_data() too many times. Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.