diff options
| author |   Paolo Bonzini <pbonzini@redhat.com> | 2016-06-27 15:08:01 +0200 |
|---|---|---|
| committer |   Yunhong Jiang <yunhong.jiang@linux.intel.com> | 2016-07-18 08:07:47 -0700 |
| commit | 6443c73ab06239ab4b1bc0511d9b78f7122f477d (patch) | |
| tree | c65a21f9088c9807a55e6aa42fb87c4a34f9ed2d /kernel/arch/x86/lib/usercopy.c | |
| parent | 09c7dd2e0b05c5bc2def37e525a98e6b344d56f5 (diff) | |
KVM: vmx: fix underflow in TSC deadline calculation
If the TSC deadline timer is programmed really close to the deadline or
even in the past, the computation in vmx_set_hv_timer can underflow and
cause delta_tsc to be set to a huge value. This generally results
in vmx_set_hv_timer returning -ERANGE, but we can fix it by limiting
delta_tsc to be positive or zero.
Reported-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Change-Id: I12eea18c3ec648dbf782d7754b7b574d7d6aa92c
upstream-status: backport
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>
Diffstat (limited to 'kernel/arch/x86/lib/usercopy.c')
0 files changed, 0 insertions, 0 deletions