bpf: Explicitly memset some bpf info structures declared on the stack
Trying to initialize a structure with "= {};" will not always clean out all padding locations in a structure. So be explicit and call memset to initialize everything for a number of bpf information structures that are then copied from userspace, sometimes from smaller memory locations than the size of the structure. Reported-by: NDaniel Borkmann <daniel@iogearbox.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net> Acked-by: NYonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20200320162258.GA794295@kroah.com
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