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authorKristina Martsenko <kristina.martsenko@arm.com>2018-12-07 18:39:28 +0000
committerWill Deacon <will.deacon@arm.com>2018-12-13 16:42:46 +0000
commitba830885656414101b2f8ca88786524d4bb5e8c1 (patch)
tree9112fbf1aee1ffcb239e5c24b767208ae0a8eec2 /arch/arm64/Kconfig
parentarm64: perf: strip PAC when unwinding userspace (diff)
downloadlinux-dev-ba830885656414101b2f8ca88786524d4bb5e8c1.tar.xz
linux-dev-ba830885656414101b2f8ca88786524d4bb5e8c1.zip
arm64: add prctl control for resetting ptrauth keys
Add an arm64-specific prctl to allow a thread to reinitialize its pointer authentication keys to random values. This can be useful when exec() is not used for starting new processes, to ensure that different processes still have different keys. Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
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