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Subject[PATCH v2 0/5] LSM: LoadPin for kernel file loading restrictions
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This provides the mini-LSM "loadpin" that intercepts the now consolidated
kernel_file_read LSM hook so that a system can keep all loads coming from
a single trusted filesystem. This is what Chrome OS uses to pin kernel
module and firmware loading to the read-only crypto-verified dm-verity
partition so that kernel module signing is not needed.

-Kees

v2:
- break out utility helpers into separate functions
- have Yama use new helpers too

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