The Linux kernel 2.6.24 and 2.6.25 before 18.104.22.168 allows local users to
cause a denial of service (memory consumption) via a large number of calls
to the get_user_pages function, which lacks a ZERO_PAGE optimization and
results in allocation of "useless newly zeroed pages."
It was discovered that the disabling of the ZERO_PAGE optimization could
lead to large memory consumption. A local attacker could exploit this
to allocate all available memory, leading to a denial of service.
kees> is this even security-relevant?
kees> linux-2.6: 89f5b7da2a6bad2e84670422ab8192382a5aeb9f
kees> and also: 672ca28e300c17bf8d792a2a7a8631193e580c74 (vmware breakage)
kees> this is being fixed via -proposed -20 abi (which will likely be -22 in the end)
Updated: 2015-07-29 20:32:45 UTC (commit 9756)