Hello, I'm working on a Pixel5 with AOSP and custom build kernel.
The issue is that I can't flash/boot the Pixel5 with custom build kernel.
Anyone please help to check this issue?
Thanks a lot.

*kernel source:*

*       repo init -u https://android.googlesource.com/kernel/manifest 
-b android-msm-redfin-4.19-android11-d1 *
*AOSP source:*
*      repo init -u https://android.googlesource.com/platform/manifest -b 
android-11.0.0_r15*

Build the kernel
       ./build/build.sh
Then put
       MSM_KERNEL/out/android-msm-pixel-4.19/dist/Image.gz-dtb 
to 
       AOSP_SOURCE/device/google/redfin-kernel/
then build the aosp
       source build/environment
       lunch aosp_redfin-userdebug
       make -j8
       fastboot flashall
When do flash, the flash process will hang at 
       < waiting for any device >
       --------------------------------------------
      Bootloader Version...: r3-0.3-6776358
      Baseband Version.....: g7250-00016-200911-B-6826885
      Serial Number........: 09261FDD4003XC
      --------------------------------------------
      Checking 'product'                                 OKAY [  0.068s]
      Setting current slot to 'b'                        OKAY [  0.411s]
      Sending 'boot_b' (98304 KB)                        OKAY [ 12.051s]
      Writing 'boot_b'                                   OKAY [  1.977s]
      Sending 'dtbo_b' (16384 KB)                        OKAY [  2.150s]
      Writing 'dtbo_b'                                   OKAY [  0.386s]
      Sending 'vbmeta_b' (8 KB)                          OKAY [  0.139s]
      Writing 'vbmeta_b'                                 OKAY [  0.078s]
       Sending 'vbmeta_system_b' (4 KB)                   OKAY [  0.140s]
       Writing 'vbmeta_system_b'                          OKAY [  0.078s]
       Sending 'vendor_boot_b' (98304 KB)                 OKAY [ 12.632s]
       Writing 'vendor_boot_b'                            OKAY [  2.020s]
       Rebooting into fastboot                            OKAY [  0.066s]
       < waiting for any device >  
And the phone keeps rebooting.

I've also tried to replace a single .ko (e.g., cam_flash.ko) in 
       MSM_KERNEL/android-msm-pixel-4.19/dist/
into 
       AOSP_SOURCE/device/google/redfin-kernel/
Then build the aosp and flashall, it will also failed to finish the flash 
and the system hang.

If I push MSM_KERNEL/android-msm-pixel-4.19/dist/cam_flash.ko to 
/data/local/tmp/,
and then insmod
     insmod cam_flash.ko
it will fail with message
     insmod : failed to load cam_flash.ko: Exec format error

Thanks a lot.

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