linux

Commit Graph

Author	SHA1	Message	Date
Will Deacon	84931327a8	arm64: ptr auth: Move per-thread keys from thread_info to thread_struct We don't need to get at the per-thread keys from assembly at all, so they can live alongside the rest of the per-thread register state in thread_struct instead of thread_info. This will also allow straighforward whitelisting of the keys for hardened usercopy should we expose them via a ptrace request later on. Signed-off-by: Will Deacon <will.deacon@arm.com>	2018-12-13 16:42:47 +00:00
Kristina Martsenko	ba83088565	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>	2018-12-13 16:42:46 +00:00

Author

SHA1

Message

Date

Will Deacon

84931327a8

arm64: ptr auth: Move per-thread keys from thread_info to thread_struct

We don't need to get at the per-thread keys from assembly at all, so
they can live alongside the rest of the per-thread register state in
thread_struct instead of thread_info.

This will also allow straighforward whitelisting of the keys for
hardened usercopy should we expose them via a ptrace request later on.

Signed-off-by: Will Deacon <will.deacon@arm.com>

2018-12-13 16:42:47 +00:00

Kristina Martsenko

ba83088565

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>

2018-12-13 16:42:46 +00:00

2 Commits