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KVM: x86: Reload pit counters for all channels when restoring state
[ Upstream commit 0185604 ] Currently if userspace restores the pit counters with a count of 0 on channels 1 or 2 and the guest attempts to read the count on those channels, then KVM will perform a mod of 0 and crash. This will ensure that 0 values are converted to 65536 as per the spec. This is CVE-2015-7513. Signed-off-by: Andy Honig <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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