diff options
Diffstat (limited to 'mm/memblock.c')
| -rw-r--r-- | mm/memblock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index f9e61e565a53..c39b36378f5d 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -374,6 +374,10 @@ void __init memblock_discard(void) kfree(memblock.reserved.regions); else memblock_free_late(addr, size); + /* Reset to prevent UAF from stray frees. */ + memblock.reserved.regions = memblock_reserved_init_regions; + memblock.reserved.cnt = 1; + memblock_remove_region(&memblock.reserved, 0); } if (memblock.memory.regions != memblock_memory_init_regions) { |