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Add uboot CRC32 checks for kernel and device-tree #3141

Merged
merged 4 commits into from
Jun 14, 2023
Merged

Add uboot CRC32 checks for kernel and device-tree #3141

merged 4 commits into from
Jun 14, 2023

Commits on Jun 14, 2023

  1. balena_check_crc: Add helper u-boot command for crc manipulation 

    This helper command saves and compares crc32 sum for a memory
area where the kernel image or the device-tree is loaded.

Can be used after loading the kernel and the dtb, and also prior
to calling booti.

Signed-off-by: Alexandru Costache <alexandru@balena.io>
Change-type: patch
    @acostach @alexgg
    acostach authored and alexgg committed Jun 14, 2023
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  2. classes/resin-u-boot: Inject crc helper command 

    ... and provide default values for the kernel and
fdt address variables which can be modified by
device repositories.

Signed-off-by: Alexandru Costache <alexandru@balena.io>
    @acostach @alexgg
    acostach authored and alexgg committed Jun 14, 2023
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  3. recipes-bsp/u-boot: Add script functions for checking kernel and dtb … 

    …validity

The balena_kernel_load_crc_save / balena_fdt_load_crc_check functions
can be used in the device repository right after the kernel or
dtb is loaded and prior to calling the main boot function,
to verify if the memory areas of the kernel or fdt overlap
or may otherwise be re-written. These functions will save
create a file named overlap_detected in the boot partition,
which can be checked during automated testing. These checks
should not prevent booting in any way.

Signed-off-by: Alexandru Costache <alexandru@balena.io>
    @acostach @alexgg
    acostach authored and alexgg committed Jun 14, 2023
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  4. tests/os: Add kernel - dtb overlap test 

    If a kernel or dtb overlap or overwrite is detected in u-boot,
a file named overlap_detected is created in the boot partition.

In this test we check for the presence of this file.

Signed-off-by: Alexandru Costache <alexandru@balena.io>
    @acostach @alexgg
    acostach authored and alexgg committed Jun 14, 2023
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