In the Linux kernel, the following vulnerability has been resolved:
netlink: Bounds-check struct nlmsgerr creation
In preparation for FORTIFYSOURCE doing bounds-check on memcpy(), switch from _nlmsgput to nlmsgput(), and explain the bounds check for dealing with the memcpy() across a composite flexible array struct. Avoids this future run-time warning:
memcpy: detected field-spanning write (size 32) of single field "&errmsg->msg" at net/netlink/af_netlink.c:2447 (size 16)