r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = socket$inet6_icmp_raw(0xa, 0x3, 0x3a)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000140)={'syz_tun\x00', <r2=>0x0})
sendmsg$inet6(r0, &(0x7f0000000780)={&(0x7f0000000080)={0xa, 0x4e20, 0x0, @mcast1, 0x6}, 0x1c, 0x0, 0x0, &(0x7f0000000c40)=[@pktinfo={{0x24, 0x29, 0x32, {@initdev={0xfe, 0x88, '\x00', 0x0, 0x0}, r2}}}], 0x28}, 0x0)