Messages in this thread | | | Date | Thu, 8 Oct 2015 14:17:35 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 2/3] slab_common: clear pointers to per memcg caches on destroy |
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On Thu, 8 Oct 2015 19:02:40 +0300 Vladimir Davydov <vdavydov@virtuozzo.com> wrote:
> Currently, we do not clear pointers to per memcg caches in the > memcg_params.memcg_caches array when a global cache is destroyed with > kmem_cache_destroy. It is fine if the global cache does get destroyed. > However, a cache can be left on the list if it still has active objects > when kmem_cache_destroy is called (due to a memory leak). If this > happens, the entries in the array will point to already freed areas, > which is likely to result in data corruption when the cache is reused > (via slab merging).
It's important that we report these leaks so the kernel bug can get fixed. The patch doesn't add such detection and reporting, but it could do so?
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