at the page level. In kernels like Linux, "allocating a page" is the most basic way to request physical memory from the system. 3. The Execution Context: Gfp_Atomic (often written as GFP_ATOMIC
GFP_ATOMIC has a higher failure rate than GFP_KERNEL because it cannot reclaim memory by sleeping. It’s like running through the labyrinth without a map — fast, but you might hit a wall (allocation failure). define labyrinth void allocpagegfpatomic exclusive
Here is a breakdown of the individual components within the string: at the page level
type in C/C++) or that it operates on an unformatted "void" of raw memory. : A standard kernel-level operation to allocate a physical page of memory. : Stands for "Get Free Page" with the GFP_ATOMIC flag. This indicates a high-priority allocation : A standard kernel-level operation to allocate a
In the context of security research (such as "House of Husk" or heap-related exploits), a "labyrinth" often refers to a technique used to or create a specific memory layout. By repeatedly calling this macro, an attacker can: