arm64: add prctl control for resetting ptrauth keys

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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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Kristina Martsenko 2018-12-07 18:39:28 +00:00 • committed by Will Deacon

parent ccc4381082

commit ba83088565

6 changed files with 71 additions and 0 deletions

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8

include/uapi/linux/prctl.h

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