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memblock: use kfree() to release kmalloced memblock regions

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memblock.{reserved,memory}.regions may be allocated using kmalloc() in
 memblock_double_array(). Use kfree() to release these kmalloced regions.
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Merge tag 'fixes-2022-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

Pull memblock fix from Mike Rapoport:
 "Use kfree() to release kmalloced memblock regions

  memblock.{reserved,memory}.regions may be allocated using kmalloc()
  in memblock_double_array(). Use kfree() to release these kmalloced
  regions"

* tag 'fixes-2022-02-26' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
  memblock: use kfree() to release kmalloced memblock regions
This commit is contained in:
Linus Torvalds 2022-02-26 12:00:44 -08:00
commit e41898d2ba
1 changed files with 8 additions and 2 deletions
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10
mm/memblock.c
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@ -366,14 +366,20 @@ void __init memblock_discard(void)
addr = __pa(memblock.reserved.regions);
size = PAGE_ALIGN(sizeof(struct memblock_region) *
memblock.reserved.max);
memblock_free_late(addr, size);
if (memblock_reserved_in_slab)
kfree(memblock.reserved.regions);
else
memblock_free_late(addr, size);
}
if (memblock.memory.regions != memblock_memory_init_regions) {
addr = __pa(memblock.memory.regions);
size = PAGE_ALIGN(sizeof(struct memblock_region) *
memblock.memory.max);
memblock_free_late(addr, size);
if (memblock_memory_in_slab)
kfree(memblock.memory.regions);
else
memblock_free_late(addr, size);
}
memblock_memory = NULL;