Refuse to copy allocations that span multiple pages
configname: CONFIG_HARDENED_USERCOPY_PAGESPAN
Linux Kernel Configuration
└─>Security options
└─>Refuse to copy allocations that span multiple pages
In linux kernel since version 4.1 (release Date: 2015-06-21)
When a multi-page allocation is done without __GFP_COMP,
hardened usercopy will reject attempts to copy it. There are,
however, several cases of this in the kernel that have not all
been removed. This config is intended to be used only while
trying to find such users.
hardened usercopy will reject attempts to copy it. There are,
however, several cases of this in the kernel that have not all
been removed. This config is intended to be used only while
trying to find such users.