diff options
| author | Steve Rutherford <srutherford@google.com> | 2017-01-11 18:28:29 -0800 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2017-06-17 15:45:33 +0200 |
| commit | e11a5f0cc74c8b0f8add083aea0535cf66681a1b (patch) | |
| tree | bcad580e23226e22b25219fcdd58f42fbd6de66c /fs | |
| parent | 3b06d33775a7a2317b286bcde3eb264be053abc3 (diff) | |
KVM: x86: Introduce segmented_write_std
commit 129a72a0d3c8e139a04512325384fe5ac119e74d upstream.
Introduces segemented_write_std.
Switches from emulated reads/writes to standard read/writes in fxsave,
fxrstor, sgdt, and sidt. This fixes CVE-2017-2584, a longstanding
kernel memory leak.
Since commit 283c95d0e389 ("KVM: x86: emulate FXSAVE and FXRSTOR",
2016-11-09), which is luckily not yet in any final release, this would
also be an exploitable kernel memory *write*!
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Fixes: 96051572c819194c37a8367624b285be10297eca
Fixes: 283c95d0e3891b64087706b344a4b545d04a6e62
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Steve Rutherford <srutherford@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions