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bug on cache_from_obj !PageSlab check

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Signed-off-by: Daniel Micay <danielmicay@gmail.com>
Signed-off-by: anupritaisno1 <www.anuprita804@gmail.com>
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Daniel Micay 2017-05-03 11:38:54 -04:00 • committed by Kreciorek
parent 8df273c856
commit c12b6fe5f1
1 changed files with 4 additions and 0 deletions
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4
mm/slab.h
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@ -478,9 +478,13 @@ static inline struct kmem_cache *virt_to_cache(const void *obj)
struct page *page;
page = virt_to_head_page(obj);
#ifdef CONFIG_BUG_ON_DATA_CORRUPTION
BUG_ON(!PageSlab(page));
#else
if (WARN_ONCE(!PageSlab(page), "%s: Object is not a Slab page!\n",
__func__))
return NULL;
#endif
return page->slab_cache;
}