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When support for pinning more than 64 cpus was added, check for cpu out-of-range values was removed. This can lead to subsequent out-of-bounds cpumap array accesses in case the cpu number is higher than the actual count. This patch returns the check. This is CVE-2013-2072 / XSA-56 Signed-off-by: Petr Matousek <pmatouse@redhat.com>