From: Christian Ehrhardt Date: Wed, 20 May 2009 13:34:56 +0000 (+0200) Subject: KVM: s390: fix signal handling X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b1d16c495d9e6fe48e7df2e1d18cafc6555a116a;p=linux-beck.git KVM: s390: fix signal handling 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 Signed-off-by: Avi Kivity --- diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1d65f6277166..5c1c30259002 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -527,8 +527,10 @@ 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 */