r0 = socket$nl_xfrm(0x10, 0x3, 0x6)
sendmsg$nl_xfrm(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000700)=@delsa={0x28, 0x11, 0x1, 0x0, 0x0, {@in6=@loopback, 0x0, 0x2}}, 0x28}}, 0x0)