MemoryBlockHeader: Difference between revisions
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Created page with "This is the header stored at the beginning of unused blocks of FCRAM memory. The kernel maintains these structures to keep a list of free blocks and their sizes. By overwriting ..." |
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Latest revision as of 06:02, 15 October 2015
This is the header stored at the beginning of unused blocks of FCRAM memory. The kernel maintains these structures to keep a list of free blocks and their sizes.
By overwriting the pointers in instances of this struct (e.g. using an attack like gspwn) and then (de)allocating memory, one can achieve a controlled ARM11 kernel-mode write on system versions up to 9.2 (memchunkhax).
Size : 0xC bytes
| Offset | Type | Description |
|---|---|---|
| 0x0 | u32 | Size in pages |
| 0x4 | MemoryBlockHeader* | Next |
| 0x8 | MemoryBlockHeader* | Prev |