r0 = socket$packet(0x11, 0x2, 0x300)
setsockopt$packet_tx_ring(r0, 0x107, 0xd, &(0x7f0000000280)=@req3={0x1000, 0x1, 0x400, 0x4}, 0x1c)
sendmsg(r0, &(0x7f00000007c0)={&(0x7f0000000000)=@pppol2tp={0x18, 0x1, {0x0, 0xffffffffffffffff, {0x2, 0x0, @loopback}}}, 0xc, 0x0}, 0x0)