Message ID | 20201209222752.2911-6-yu-cheng.yu@intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | Control-flow Enforcement: Indirect Branch Tracking | expand |
diff --git a/arch/x86/kernel/cet_prctl.c b/arch/x86/kernel/cet_prctl.c index 4197d985b5ff..92120d8bdd9f 100644 --- a/arch/x86/kernel/cet_prctl.c +++ b/arch/x86/kernel/cet_prctl.c @@ -22,6 +22,9 @@ static int copy_status_to_user(struct cet_status *cet, u64 arg2) buf[2] = (u64)cet->shstk_size; } + if (cet->ibt_enabled) + buf[0] |= GNU_PROPERTY_X86_FEATURE_1_IBT; + return copy_to_user((u64 __user *)arg2, buf, sizeof(buf)); } @@ -56,6 +59,8 @@ int prctl_cet(int option, u64 arg2) return -EINVAL; if (features & GNU_PROPERTY_X86_FEATURE_1_SHSTK) cet_disable_shstk(); + if (features & GNU_PROPERTY_X86_FEATURE_1_IBT) + cet_disable_ibt(); return 0; case ARCH_X86_CET_LOCK: