r0 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10)
sendmsg$NBD_CMD_DISCONNECT(r0, &(0x7f00000005c0)={&(0x7f0000000480)={0x10, 0x0, 0x0, 0x800000}, 0xc, &(0x7f0000000580)={&(0x7f00000004c0)={0x14}, 0x14}}, 0x0)