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| author | Andy Honig <ahonig@google.com> | 2013-02-20 22:49:16 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-25 19:51:10 (GMT) |
| commit | 24a5d26686ee4bb22fcf5d3c8b9d9227cbc0c187 (patch) | |
| tree | c5d72d023373aff4923cd77529e033f54d6fc553 /include/linux/kvm_types.h | |
| parent | 17b61c3d1ca2a739c44e0c24565ce97a2086156f (diff) | |
| download | linux-fsl-qoriq-24a5d26686ee4bb22fcf5d3c8b9d9227cbc0c187.tar.xz | |
KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798)
commit a2c118bfab8bc6b8bb213abfc35201e441693d55 upstream.
If the guest specifies a IOAPIC_REG_SELECT with an invalid value and follows
that with a read of the IOAPIC_REG_WINDOW KVM does not properly validate
that request. ioapic_read_indirect contains an
ASSERT(redir_index < IOAPIC_NUM_PINS), but the ASSERT has no effect in
non-debug builds. In recent kernels this allows a guest to cause a kernel
oops by reading invalid memory. In older kernels (pre-3.3) this allows a
guest to read from large ranges of host memory.
Tested: tested against apic unit tests.
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/kvm_types.h')
0 files changed, 0 insertions, 0 deletions