android 11 open source project for emulator problem before custom rom

I try to build android open source project, I am at the beginning of it. Initially, I have successfully built android-11.0.0_r17 source code. I have obtained the out files (system.img, ramdisk.img and userdata.img). When I tried to execute following emulator command, it has been failed. I mean, the system has run in a loop and in every cycle the following message has been appeared.

$ emulator -avd a25x86 -verbose -show-kernel -system /home/ubuntu/aosp/out/target/product/generic_x86/system.img -ramdisk /home/ubuntu/aosp/out/target/product/generic_x86/ramdisk.img -initdata /home/ubuntu/aosp/out/target/product/generic_x86/userdata.img

[    0.000000] Linux version 5.4.61-android11-0-00791-gbad091cc4bf3-ab6833933 (build-user@build-host) (Android (6443078 based on r383902) clang version 11.0.1 (https://android.googlesource.com/toolchain/llvm-project b397f81060ce6d701042b782172ed13bee898b79), LLD 11.0.1 (/buildbot/tmp/tmp6_m7QH b397f81060ce6d701042b782172ed13bee898b79)) #1 SMP PREEMPT 2020-09-14 14:42:20
[    0.000000] Command line: qemu=1 no_timer_check androidboot.hardware=ranchu androidboot.serialno=EMULATOR30X0X21X0 clocksource=pit console=ttyS0,38400 android.qemud=1 android.checkjni=1 qemu.gles=1 qemu.settings.system.screen_off_timeout=2147483647 qemu.encrypt=1 qemu.vsync=60 qemu.gltransport=pipe qemu.gltransport.drawFlushInterval=800 qemu.opengles.version=131072 cma=260M@0-4G qemu.wifi=1 mac80211_hwsim.channels=2 loop.max_part=7 androidboot.vbmeta.size=6144 androidboot.vbmeta.hash_alg=sha256 androidboot.vbmeta.digest=41e0952e52a1df2eb16607419694ec2a0ecf7eb9cdc3698594df3668cebf05b9 androidboot.boot_devices=pci0000:00/0000:00:03.0 qemu.hwcodec.avcdec=2 qemu.hwcodec.vpxdec=2 ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000$0xff018000 qemu.dalvik.vm.heapsize=512m qemu.camera_protocol_ver=1 mac80211_hwsim.radios=0
[    0.000000] x86/fpu: x87 FPU will use FXSAVE
[    0.000000] BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000007ffd5fff] usable
[    0.000000] BIOS-e820: [mem 0x000000007ffd6000-0x000000007fffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] user-defined physical RAM map:
[    0.000000] user: [mem 0x0000000000000000-0x000000000009fbff] usable
[    0.000000] user: [mem 0x000000000009fc00-0x000000000009ffff] reserved
[    0.000000] user: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[    0.000000] user: [mem 0x0000000000100000-0x000000007ffd5fff] usable
[    0.000000] user: [mem 0x000000007ffd6000-0x000000007fffffff] reserved
[    0.000000] user: [mem 0x00000000feffc000-0x00000000feffffff] reserved
[    0.000000] user: [mem 0x00000000ff018000-0x00000000ff027fff] reserved
[    0.000000] user: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
[    0.000000] SMBIOS 2.8 present.
[    0.000000] DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.11.1-0-g0551a4be2c-prebuilt.qemu-project.org 04/01/2014
[    0.000000] Hypervisor detected: KVM
[    0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
[    0.000001] kvm-clock: cpu 0, msr 176bc001, primary cpu clock
[    0.000001] kvm-clock: using sched offset of 10807707590 cycles
[    0.000061] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.000190] tsc: Detected 2499.992 MHz processor
[    0.002785] last_pfn = 0x7ffd6 max_arch_pfn = 0x400000000
[    0.003890] x86/PAT: PAT not supported by CPU.
[    0.004039] x86/PAT: Configuration [0-7]: WB  WT  UC- UC  WB  WT  UC- UC  
[    0.028057] found SMP MP-table at [mem 0x000f5ae0-0x000f5aef]
[    0.028705] RAMDISK: [mem 0x7fef0000-0x7ffcffff]
[    0.028947] ACPI: Early table checksum verification disabled
[    0.029102] ACPI: RSDP 0x00000000000F58E0 000014 (v00 BOCHS )
[    0.029109] ACPI: RSDT 0x000000007FFE1B46 000030 (v01 BOCHS  BXPCRSDT 00000001 BXPC 00000001)
[    0.029193] ACPI: FACP 0x000000007FFE1A1A 000074 (v01 BOCHS  BXPCFACP 00000001 BXPC 00000001)
[    0.029202] ACPI: DSDT 0x000000007FFE0040 0019DA (v01 BOCHS  BXPCDSDT 00000001 BXPC 00000001)
[    0.029208] ACPI: FACS 0x000000007FFE0000 000040
[    0.029214] ACPI: APIC 0x000000007FFE1A8E 000080 (v01 BOCHS  BXPCAPIC 00000001 BXPC 00000001)
[    0.029219] ACPI: HPET 0x000000007FFE1B0E 000038 (v01 BOCHS  BXPCHPET 00000001 BXPC 00000001)
[    0.029576] cma: Reserved 260 MiB at 0x000000006f800000
[    0.029632] Zone ranges:
[    0.029634]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.029636]   DMA32    [mem 0x0000000001000000-0x000000007ffd5fff]
[    0.029638]   Normal   empty
[    0.029639] Movable zone start for each node
[    0.029640] Early memory node ranges
[    0.029642]   node   0: [mem 0x0000000000001000-0x000000000009efff]
[    0.029663]   node   0: [mem 0x0000000000100000-0x000000007ffd5fff]
[    0.029747] Zeroed struct page in unavailable ranges: 140 pages
[    0.029767] Initmem setup node 0 [mem 0x0000000000001000-0x000000007ffd5fff]
[    0.043999] ACPI: PM-Timer IO Port: 0x608
[    0.044090] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.044518] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.044524] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.044551] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.044552] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.044595] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.044597] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.044606] Using ACPI (MADT) for SMP configuration information
[    0.044609] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[    0.044669] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
[    0.044839] [mem 0x80000000-0xfeffbfff] available for PCI devices
[    0.044841] Booting paravirtualized kernel on KVM
[    0.044884] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
[    0.044912] setup_percpu: NR_CPUS:32 nr_cpumask_bits:32 nr_cpu_ids:2 nr_node_ids:1
[    0.045999] percpu: Embedded 53 pages/cpu s176280 r8192 d32616 u1048576
[    0.046158] KVM setup async PF for cpu 0
[    0.046210] kvm-stealtime: cpu 0, msr 7fc17240
[    0.046257] Built 1 zonelists, mobility grouping on.  Total pages: 515934
[    0.046261] Kernel command line: qemu=1 no_timer_check androidboot.hardware=ranchu androidboot.serialno=EMULATOR30X0X21X0 clocksource=pit console=ttyS0,38400 android.qemud=1 android.checkjni=1 qemu.gles=1 qemu.settings.system.screen_off_timeout=2147483647 qemu.encrypt=1 qemu.vsync=60 qemu.gltransport=pipe qemu.gltransport.drawFlushInterval=800 qemu.opengles.version=131072 cma=260M@0-4G qemu.wifi=1 mac80211_hwsim.channels=2 loop.max_part=7 androidboot.vbmeta.size=6144 androidboot.vbmeta.hash_alg=sha256 androidboot.vbmeta.digest=41e0952e52a1df2eb16607419694ec2a0ecf7eb9cdc3698594df3668cebf05b9 androidboot.boot_devices=pci0000:00/0000:00:03.0 qemu.hwcodec.avcdec=2 qemu.hwcodec.vpxdec=2 ramoops.mem_address=0xff018000 ramoops.mem_size=0x10000 memmap=0x10000$0xff018000 qemu.dalvik.vm.heapsize=512m qemu.camera_protocol_ver=1 mac80211_hwsim.radios=0
[    0.047015] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
[    0.047196] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[    0.047577] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[    0.053720] Memory: 1758180K/2096592K available (18799K kernel code, 1169K rwdata, 9948K rodata, 1324K init, 1404K bss, 72172K reserved, 266240K cma-reserved)
[    0.053884] random: get_random_u64 called from __kmem_cache_create+0xe8/0x840 with crng_init=0
[    0.054511] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.054633] Kernel/User page tables isolation: enabled
[    0.055746] rcu: Preemptible hierarchical RCU implementation.
[    0.055748] rcu:     RCU dyntick-idle grace-period acceleration is enabled.
[    0.055749] rcu:     RCU restricting CPUs from NR_CPUS=32 to nr_cpu_ids=2.
[    0.055751]  Tasks RCU enabled.
[    0.055752] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[    0.055753] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.058544] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[    0.059243] rcu:     Offload RCU callbacks from CPUs: (none).
[    0.597708] printk: console [ttyS0] enabled
[    0.600758] ACPI: Core revision 20190816
[    0.604794] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
[    0.613056] APIC: Switch to symmetric I/O mode setup
[    0.629022] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    0.633744] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x24093255d7c, max_idle_ns: 440795319144 ns
[    0.641622] Calibrating delay loop (skipped) preset value.. 4999.98 BogoMIPS (lpj=9999968)
[    0.645609] pid_max: default: 32768 minimum: 301
[    0.649716] LSM: Security Framework initializing
[    0.653643] SELinux:  Initializing.
[    0.657628] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.661585] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.670286] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
[    0.673577] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
[    0.677584] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[    0.681582] Spectre V2 : Mitigation: Full generic retpoline
[    0.685576] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
[    0.689577] Speculative Store Bypass: Vulnerable
[    0.693584] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
[    0.700260] Freeing SMP alternatives memory: 56K
[    0.814510] smpboot: CPU0: Intel Android virtual processor (family: 0x6, model: 0x6, stepping: 0x3)
[    0.817989] Performance Events: generic architected perfmon v1, core PMU driver.
[    0.821584] core: CPUID marked event: 'cpu cycles' unavailable
[    0.825577] core: CPUID marked event: 'instructions' unavailable
[    0.829577] core: CPUID marked event: 'bus cycles' unavailable
[    0.833577] core: CPUID marked event: 'cache references' unavailable
[    0.837577] core: CPUID marked event: 'cache misses' unavailable
[    0.841577] core: CPUID marked event: 'branch instructions' unavailable
[    0.845577] core: CPUID marked event: 'branch misses' unavailable
.....
[    2.739616] xt_time: kernel timezone is -0000
[    2.743417] ipip: IPv4 and MPLS over IPv4 tunneling driver
[    2.748025] gre: GRE over IPv4 demultiplexor driver
[    2.752417] ip_gre: GRE over IPv4 tunneling driver
[    2.757220] IPv4 over IPsec tunneling driver
[    2.762571] Initializing XFRM netlink socket
[    2.765857] IPsec XFRM device driver
[    2.768642] NET: Registered protocol family 10
[    2.772915] Segment Routing with IPv6
[    2.776067] mip6: Mobile IPv6
[    2.779628] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    2.785399] ip6_gre: GRE over IPv6 tunneling driver
[    2.789394] NET: Registered protocol family 17
[    2.793124] NET: Registered protocol family 15
[    2.797482] Bluetooth: RFCOMM TTY layer initialized
[    2.802094] Bluetooth: RFCOMM socket layer initialized
[    2.808480] Bluetooth: RFCOMM ver 1.11
[    2.811833] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[    2.816092] Bluetooth: HIDP socket layer initialized
[    2.819892] l2tp_core: L2TP core driver, V2.0
[    2.823153] l2tp_ppp: PPPoL2TP kernel driver, V2.0
[    2.826713] tipc: Activated (version 2.0.0)
[    2.829935] NET: Registered protocol family 30
[    2.833236] tipc: Started in single node mode
[    2.837348] IPI shorthand broadcast: enabled
[    2.840593] SSE version of gcm_enc/dec engaged.
[    2.851004] sched_clock: Marking stable (2280747994, 570242742)->(3133591105, -282600369)
[    2.857699] registered taskstats version 1
[    2.860708] Loading compiled-in X.509 certificates
[    2.864144] Key type ._fscrypt registered
[    2.867152] Key type .fscrypt registered
[    2.870597] Key type fscrypt-provisioning registered
[    2.874560] pstore: Using crash dump compression: deflate
[    2.879245] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[    2.886723] cryptomgr_probe (100) used greatest stack depth: 14248 bytes left
[    2.887065] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[    2.901940] ALSA device list:
[    2.905505] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[    2.909830]   No soundcards found.
[    2.914951] platform regulatory.0: Falling back to sysfs fallback for: regulatory.db
[    2.931774] Freeing unused kernel image memory: 1324K
[    2.978211] Write protecting the kernel read-only data: 30720k
[    2.995144] Freeing unused kernel image memory: 1680K
[    3.003620] Freeing unused kernel image memory: 292K
[    3.012187] Run /init as init process
[    3.029628] init: init first stage started!
[    3.036823] init: Unable to open /lib/modules, skipping module loading.
[    3.047992] init: [libfs_mgr]ReadFstabFromDt(): failed to read fstab from dt
[    3.059464] init: [libfs_mgr]ReadDefaultFstab(): failed to find device default fstab
[    3.072069] init: Failed to fstab for first stage mount
[    3.080806] init: Using Android DT directory /proc/device-tree/firmware/android/
[    3.093390] init: First stage mount skipped (missing/incompatible/empty fstab in device tree)
[    3.106700] init: Skipped setting INIT_AVB_VERSION (not in recovery mode)
[    3.118439] init: execv("/system/bin/init") failed: No such file or directory
[    3.125095] init: InitFatalReboot: signal 6
[    3.139460] Unregister pv shared memory for cpu 0
[    3.142974] Unregister pv shared memory for cpu 1
[    3.146555] cfg80211: failed to load regulatory.db
[    3.153437] reboot: Restarting system with command 'bootloader'
[    3.159962] reboot: machine restart
emulator: No acpi ini file provided, using default

I think it is about "Unable to open /lib/modules, skipping module loading". When I checked the ramdisk.img with gzip and I saw "init" file. Could you guide me at that point? Any advice will be appreciated. Thank you for your time. Best regards.