diff options
| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-10-28 00:03:43 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-10-29 13:13:51 +0100 |
| commit | cd9b8e2c48b241be084dc794440e0e69267ef8e1 (patch) | |
| tree | 5c374dad5036d05134f833c10073bc89a0f85657 /arch/x86/xen | |
| parent | fd56e1546a5f734290cbedd2b81c518850736511 (diff) | |
| download | op-kernel-dev-cd9b8e2c48b241be084dc794440e0e69267ef8e1.zip op-kernel-dev-cd9b8e2c48b241be084dc794440e0e69267ef8e1.tar.gz | |
KVM: x86: Fix far-jump to non-canonical check
Commit d1442d85cc30 ("KVM: x86: Handle errors when RIP is set during far
jumps") introduced a bug that caused the fix to be incomplete. Due to
incorrect evaluation, far jump to segment with L bit cleared (i.e., 32-bit
segment) and RIP with any of the high bits set (i.e, RIP[63:32] != 0) set may
not trigger #GP. As we know, this imposes a security problem.
In addition, the condition for two warnings was incorrect.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
[Add #ifdef CONFIG_X86_64 to avoid complaints of undefined behavior. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/xen')
0 files changed, 0 insertions, 0 deletions
