lkml.org 
[lkml]   [2012]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 007/117] KVM: s390: Sanitize fpc registers for KVM_SET_FPU
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Marcelo Tosatti <mtosatti@redhat.com>

From: Christian Borntraeger <borntraeger@de.ibm.com>

(cherry picked from commit 851755871c1f3184f4124c466e85881f17fa3226)

commit 7eef87dc99e419b1cc051e4417c37e4744d7b661 (KVM: s390: fix
register setting) added a load of the floating point control register
to the KVM_SET_FPU path. Lets make sure that the fpc is valid.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/s390/kvm/kvm-s390.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d1c44573..d3cb86c 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -418,7 +418,7 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
- vcpu->arch.guest_fpregs.fpc = fpu->fpc;
+ vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK;
restore_fp_regs(&vcpu->arch.guest_fpregs);
return 0;
}



\
 
 \ /
  Last update: 2012-05-28 08:21    [W:0.383 / U:2.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site