The try_to_unmap_cluster function in mm/rmap.c in the Linux kernel
before 3.14.3 does not properly consider which pages must be locked,
which allows local users to cause a denial of service (system crash)
by triggering a memory-usage pattern that requires removal of
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MLIST:[oss-security] 20140430 Re: CVE request Linux kernel: mm: try_to_unmap_cluster() should lock_page() before mlocking
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