r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000140)={'syz_tun\x00', <r2=>0x0})
r3 = syz_genetlink_get_family_id$ethtool(&(0x7f0000016140), 0xffffffffffffffff)
sendmsg$ETHTOOL_MSG_STRSET_GET(r0, &(0x7f0000002d00)={0x0, 0x0, &(0x7f0000000180)={&(0x7f0000000080)={0x20, r3, 0x1, 0x0, 0x0, {}, [@ETHTOOL_A_STRSET_HEADER={0xc, 0x1, 0x0, 0x1, [@ETHTOOL_A_HEADER_DEV_INDEX={0x8, 0x1, r2}]}]}, 0x20}}, 0x0)