r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f00000000c0)={0xa, 0x0, 0x0, @mcast1, 0x3}, 0x1c)
syz_io_uring_setup(0x329c, &(0x7f0000000180), &(0x7f000000d000/0x1000)=nil, &(0x7f0000ffc000/0x4000)=nil, 0x0, 0x0)
sendmmsg$inet6(r0, &(0x7f0000004d00), 0x7ffff000, 0x811)