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| author |   Maxime Ripard <maxime@cerno.tech> | 2021-09-14 09:25:30 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-09-14 09:25:30 +0200 |
| commit | 2f76520561d01a5f37e6d6ed2c2e441b6a355a96 (patch) | |
| tree | 692f210145f35ec2621e2015d788267f25e673cb /arch/arm64/kernel/pointer_auth.c | |
| parent | drm/ttm: Try to check if new ttm man out of bounds during compile (diff) | |
| parent | Linux 5.15-rc1 (diff) | |
Merge drm/drm-next into drm-misc-next
Kickstart new drm-misc-next cycle.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Diffstat (limited to 'arch/arm64/kernel/pointer_auth.c')
| -rw-r--r-- | arch/arm64/kernel/pointer_auth.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/arm64/kernel/pointer_auth.c b/arch/arm64/kernel/pointer_auth.c index 60901ab0a7fe..2708b620b4ae 100644 --- a/arch/arm64/kernel/pointer_auth.c +++ b/arch/arm64/kernel/pointer_auth.c @@ -67,7 +67,7 @@ static u64 arg_to_enxx_mask(unsigned long arg) int ptrauth_set_enabled_keys(struct task_struct *tsk, unsigned long keys, unsigned long enabled) { - u64 sctlr = tsk->thread.sctlr_user; + u64 sctlr; if (!system_supports_address_auth()) return -EINVAL; @@ -78,12 +78,14 @@ int ptrauth_set_enabled_keys(struct task_struct *tsk, unsigned long keys, if ((keys & ~PR_PAC_ENABLED_KEYS_MASK) || (enabled & ~keys)) return -EINVAL; + preempt_disable(); + sctlr = tsk->thread.sctlr_user; sctlr &= ~arg_to_enxx_mask(keys); sctlr |= arg_to_enxx_mask(enabled); + tsk->thread.sctlr_user = sctlr; if (tsk == current) - set_task_sctlr_el1(sctlr); - else - tsk->thread.sctlr_user = sctlr; + update_sctlr_el1(sctlr); + preempt_enable(); return 0; } |