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| author | Steve Rutherford <srutherford@google.com> | 2017-01-11 18:28:29 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-01-12 14:34:58 +0100 |
| commit | 129a72a0d3c8e139a04512325384fe5ac119e74d (patch) | |
| tree | 56a0adfdeff6c007ba3a5f36577036f20e7d5150 /fs/direct-io.c | |
| parent | cef84c302fe051744b983a92764d3fcca933415d (diff) | |
| download | linux-129a72a0d3c8e139a04512325384fe5ac119e74d.tar.bz2 | |
KVM: x86: Introduce segmented_write_std
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>
Cc: stable@vger.kernel.org
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>
Diffstat (limited to 'fs/direct-io.c')
0 files changed, 0 insertions, 0 deletions