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arm64: entry: Apply BP hardening for high-priority synchronous exceptions
authorWill Deacon <will.deacon@arm.com>
Fri, 2 Feb 2018 17:31:39 +0000 (17:31 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Tue, 6 Feb 2018 22:53:44 +0000 (22:53 +0000)
commit5dfc6ed27710c42cbc15db5c0d4475699991da0a
treeb2cb8fd601a5694ce4992354dc83c0fbd6e2f459tree | snapshot
parent91b2d3442f6a44dce875670d702af22737ad5effcommit | diff
arm64: entry: Apply BP hardening for high-priority synchronous exceptions

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>
arch/arm64/kernel/entry.S diff | blob | history
arch/arm64/mm/fault.c diff | blob | history
Domain: System / Kernel;