Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes: > On Mon, Jun 29, 2015 at 03:18:51PM -0400, Bandan Das wrote: >> >> Commit f104765b4f81fd74d69e0eb161e89096deade2db upstream. >> >> This causes the L1 guest to crash when running a nested guest >> with an AMD processor that doesn't support NRIPS. >> >> If hardware doesn't support DecodeAssist - a feature that provides >> more information about the intercept in the VMCB, KVM decodes the >> instruction and then updates the next_rip vmcb control field. >> However, NRIP support itself depends on cpuid Fn8000_000A_EDX[NRIPS]. >> Since skip_emulated_instruction() doesn't verify nrip support >> before accepting control.next_rip as valid, avoid writing this >> field if support isn't present. >> >> Signed-off-by: Bandan Das <bsd@xxxxxxxxxx> >> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> >> --- >> arch/x86/kvm/svm.c | 8 ++++++-- >> 1 file changed, 6 insertions(+), 2 deletions(-) > > What stable kernel trees do you want this applied to? Sorry, I missed that part. I believe this bug is present since commit cfec82cb7d3 which makes it applicable to #3.0+ Bandan > thanks, > > greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html