r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$ethtool(&(0x7f0000000100), 0xffffffffffffffff)
r2 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a)
ioctl$sock_SIOCGIFINDEX(r2, 0x8933, &(0x7f0000000140)={'syz_tun\x00', <r3=>0x0})
sendmsg$ETHTOOL_MSG_LINKMODES_SET(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000140)={0x28, r1, 0x3ddc8cfb493e3995, 0x0, 0x0, {}, [@ETHTOOL_A_LINKMODES_HEADER={0xc, 0x1, 0x0, 0x1, [@ETHTOOL_A_HEADER_DEV_INDEX={0x8, 0x1, r3}]}, @ETHTOOL_A_LINKMODES_AUTONEG={0x5}]}, 0x28}}, 0x0)