diff options
Diffstat (limited to 'mm/slab.c')
-rw-r--r-- | mm/slab.c | 13 |
1 files changed, 1 insertions, 12 deletions
@@ -3602,21 +3602,10 @@ EXPORT_SYMBOL(kmem_cache_alloc_notrace); | |||
3602 | */ | 3602 | */ |
3603 | int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr) | 3603 | int kmem_ptr_validate(struct kmem_cache *cachep, const void *ptr) |
3604 | { | 3604 | { |
3605 | unsigned long addr = (unsigned long)ptr; | ||
3606 | unsigned long min_addr = PAGE_OFFSET; | ||
3607 | unsigned long align_mask = BYTES_PER_WORD - 1; | ||
3608 | unsigned long size = cachep->buffer_size; | 3605 | unsigned long size = cachep->buffer_size; |
3609 | struct page *page; | 3606 | struct page *page; |
3610 | 3607 | ||
3611 | if (unlikely(addr < min_addr)) | 3608 | if (unlikely(!kern_ptr_validate(ptr, size))) |
3612 | goto out; | ||
3613 | if (unlikely(addr > (unsigned long)high_memory - size)) | ||
3614 | goto out; | ||
3615 | if (unlikely(addr & align_mask)) | ||
3616 | goto out; | ||
3617 | if (unlikely(!kern_addr_valid(addr))) | ||
3618 | goto out; | ||
3619 | if (unlikely(!kern_addr_valid(addr + size - 1))) | ||
3620 | goto out; | 3609 | goto out; |
3621 | page = virt_to_page(ptr); | 3610 | page = virt_to_page(ptr); |
3622 | if (unlikely(!PageSlab(page))) | 3611 | if (unlikely(!PageSlab(page))) |