Re: Kernel-4.14: With ubuntu-18.04 building rootfs images and booting gives SQUASHFS error: xz decompression failed, data probably corrupt

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Hi,

On Mon, 8 Nov 2021 at 20:00, Pintu Agarwal <pintu.ping@xxxxxxxxx> wrote:
>
> Hi,
> Here are few details.
> * Linux Kernel: 4.14
> * Processor: Qualcomm Arm32 Cortex-A7
> * Storage: NAND 512MB
> * Platform: Simple busybox
> * Filesystem: UBIFS, Squashfs
> * Build system: Linux Ubuntu 18.04 with Yocto build system
> * Consists of nand raw partitions, squashfs ubi volumes.
>
> What we are trying to do:
> We are trying to boot dm-verity enabled rootfs on our system.
> The images for rootfs were generated on Ubuntu 18.04 machine using
> Yocto build system.
>
> Issue:
> Earlier, when we were using Ubuntu 16.04 to generate our images, the
> system was booting fine even with dm-verity enabled.
> Recently we switched to Ubuntu 18.04 build machine, and now with the
> same changes we are seeing the below squashfs error, just after the
> mount.
> Note: with 18.04 also our rootfs is mounting successfully and
> dm-verity is also working fine.
> We only get these squashfs errors flooded in the boot logs:
> {{{
> ....
> [    5.153479] device-mapper: init: dm-0 is ready
> [    5.334282] VFS: Mounted root (squashfs filesystem) readonly on device 253:0.
> ....
> [    8.954120] SQUASHFS error: xz decompression failed, data probably corrupt
> [    8.954153] SQUASHFS error: squashfs_read_data failed to read block 0x1106
> [    8.970316] SQUASHFS error: Unable to read data cache entry [1106]
> [    8.970349] SQUASHFS error: Unable to read page, block 1106, size 776c
> [    8.980298] SQUASHFS error: Unable to read data cache entry [1106]
> [    8.981911] SQUASHFS error: Unable to read page, block 1106, size 776c
> [    8.988280] SQUASHFS error: Unable to read data cache entry [1106]
> ....
> }}}
>
Just one question:
Is there any history about these squashfs errors while cross-compiling
images on Ubuntu 18.04 or higher ?


Thanks,
Pintu

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