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x86/cfi: Add boot time hash randomization
authorPeter Zijlstra <[email protected]>
Thu, 27 Oct 2022 09:28:16 +0000 (11:28 +0200)
committerPeter Zijlstra <[email protected]>
Tue, 1 Nov 2022 12:44:11 +0000 (13:44 +0100)
commit0c3e806ec0f9771fa1f34c60499097d9260a8bb7
tree60850d57aa4d59cbc253f7939267af7ec426f057tree | snapshot
parent082c4c815252ea333b0f3a51e336df60c2314fe2commit | diff
x86/cfi: Add boot time hash randomization

In order to avoid known hashes (from knowing the boot image),
randomize the CFI hashes with a per-boot random seed.

Suggested-by: Kees Cook <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
arch/x86/kernel/alternative.c diff | blob | blame | history
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