Comment 2 for bug 1796754

I was hit by this issue when I tried to run some Java program. And it turns out jdk sets the buf to NULL: http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/887e525597f8/src/solaris/native/java/net/NetworkInterface.c#l1042

Setting to NULL is valid according to http://man7.org/linux/man-pages/man7/netdevice.7.html

But qemu doesn’t handle the case: https://github.com/qemu/qemu/blob/aa8e26de9617756febcbf794dda965df307fdaaa/linux-user/syscall.c#L4105

I guess qemu developers didn’t handle the case because the Linux kernel changed and they were based on behavior of old version: https://linux.die.net/man/7/netdevice

Please add the support for it otherwise a wide range of network related Java programs won’t run.