diff options
| author | Peter Shier <pshier@google.com> | 2018-10-11 11:46:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:47:25 +0100 |
| commit | 236fd677125f974aaf39f09074d226a884b4fe0e (patch) | |
| tree | 5027db0f20f8d512ecbee58ec2a94ee7d15fa69a /kernel | |
| parent | 24b027d2b1386da03aafb2aaac69d4fa67ee7d9c (diff) | |
KVM: nVMX: unconditionally cancel preemption timer in free_nested (CVE-2019-7221)
commit ecec76885bcfe3294685dc363fd1273df0d5d65f upstream.
Bugzilla: 1671904
There are multiple code paths where an hrtimer may have been started to
emulate an L1 VMX preemption timer that can result in a call to free_nested
without an intervening L2 exit where the hrtimer is normally
cancelled. Unconditionally cancel in free_nested to cover all cases.
Embargoed until Feb 7th 2019.
Signed-off-by: Peter Shier <pshier@google.com>
Reported-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reported-by: Felix Wilhelm <fwilhelm@google.com>
Cc: stable@kernel.org
Message-Id: <20181011184646.154065-1-pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions