| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 17 Jun 2007 12:44:01 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Avi Kivity <avi@...ranet.com> Subject: [PATCH 20/58] KVM: VMX: Only reload guest msrs if they are already loaded If we set an msr via an ioctl() instead of by handling a guest exit, we have the host state loaded, so reloading the msrs would clobber host state instead of guest state. This fixes a host oops (and loss of a cpu) on a guest reboot. Signed-off-by: Avi Kivity <avi@...ranet.com> --- drivers/kvm/vmx.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index 096cb6a..b353eaa 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -600,7 +600,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) msr = find_msr_entry(vcpu, msr_index); if (msr) msr->data = data; - load_msrs(vcpu->guest_msrs, NR_BAD_MSRS); + if (vcpu->vmx_host_state.loaded) + load_msrs(vcpu->guest_msrs, NR_BAD_MSRS); break; #endif case MSR_IA32_SYSENTER_CS: -- 1.5.0.6 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists