diff mbox

[2/3] kvm-s390: fix signal handling

Message ID 1242826497-6797-3-git-send-email-ehrhardt@linux.vnet.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

ehrhardt@linux.vnet.ibm.com May 20, 2009, 1:34 p.m. UTC 
From: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

If signal pending is true we exit without updating kvm_run, userspace
currently just does nothing and jumps to kvm_run again.
Since we did not set an exit_reason we might end up with a random one
(whatever was the last exit). Therefore it was possible to e.g. jump to
the psw position the last real interruption set.
Setting the INTR exit reason ensures that no old psw data is swapped
in on reentry.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
---

[diffstat]
 kvm-s390.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

[diff]
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diff mbox

Patch

Index: kvm/arch/s390/kvm/kvm-s390.c
===================================================================
--- kvm.orig/arch/s390/kvm/kvm-s390.c
+++ kvm/arch/s390/kvm/kvm-s390.c
@@ -524,8 +524,10 @@  rerun_vcpu:
 	if (rc == SIE_INTERCEPT_RERUNVCPU)
 		goto rerun_vcpu;
 
-	if (signal_pending(current) && !rc)
+	if (signal_pending(current) && !rc) {
+		kvm_run->exit_reason = KVM_EXIT_INTR;
 		rc = -EINTR;
+	}
 
 	if (rc == -ENOTSUPP) {
 		/* intercept cannot be handled in-kernel, prepare kvm-run */