Hi syzbot maintainers, Thanks for the report. > hwsim_new_radio_nl+0x5b7/0x7c0 drivers/net/wireless/mac80211_hwsim.c:3152 > genl_family_rcv_msg+0x7b7/0xfb0 net/netlink/genetlink.c:599 > genl_rcv_msg+0xb2/0x140 net/netlink/genetlink.c:624 You're getting into the kernel via generic netlink receive, so just as an FYI - the generic netlink numbers aren't stable across systems, so your reproducer has a quite good chance of not working without your kernel .config and (virt) hardware environment. I'll take a look at this and the rfkill one, I assume that there are some sanity checks missing in hwsim generic netlink when it builds a radio struct. However, I can't really promise that I'll be able to validate the changes against your reproducer. johannes