arm64: entry: Apply BP hardening for high-priority synchronous exceptions

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Software-step and PC alignment fault exceptions have higher priority than
instruction abort exceptions, so apply the BP hardening hooks there too
if the user PC appears to reside in kernel space.

Reported-by: Dan Hettena <dhettena@nvidia.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2018-02-02 17:31:39 +00:00 • committed by Catalin Marinas

parent 91b2d3442f

commit 5dfc6ed277

2 changed files with 13 additions and 1 deletions

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5

arch/arm64/kernel/entry.S

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9

arch/arm64/mm/fault.c

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