diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-31 11:58:56 -0700 |
|---|---|---|
| committer | AK <andi@firstfloor.org> | 2011-03-31 11:58:56 -0700 |
| commit | c8149a61de28892d8d28fd2180d1f9bbba2c9551 (patch) | |
| tree | 21936b94612c21c0a2bb62c7842bac2c1e880620 /kernel/signal.c | |
| parent | 8aeabadb7ba1c1310bb968950e5f3f1793a58b19 (diff) | |
KVM: VMX: Fix host userspace gsbase corruption
commit c8770e7ba63bb5dd8fe5f9d251275a8fa717fb78 upstream.
We now use load_gs_index() to load gs safely; unfortunately this also
changes MSR_KERNEL_GS_BASE, which we managed separately. This resulted
in confusion and breakage running 32-bit host userspace on a 64-bit kernel.
Fix by
- saving guest MSR_KERNEL_GS_BASE before we we reload the host's gs
- doing the host save/load unconditionally, instead of only when in guest
long mode
Things can be cleaned up further, but this is the minmal fix for now.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'kernel/signal.c')
0 files changed, 0 insertions, 0 deletions