summaryrefslogtreecommitdiffstats
path: root/arch
diff options
context:
space:
mode:
authorAndy Honig <ahonig@google.com>2013-02-20 14:49:16 -0800
committerMarcelo Tosatti <mtosatti@redhat.com>2013-03-19 14:20:21 -0300
commita2c118bfab8bc6b8bb213abfc35201e441693d55 (patch)
tree39261e300db388699d388d98afa4aca107258571 /arch
parent0b79459b482e85cb7426aa7da683a9f2c97aeae1 (diff)
KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798)
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>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions