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Re: [PATCH 1/2] mm/slub: fix slab double-free in case of duplicate sysfs filename

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  Re: [PATCH 1/2] mm/slub: fix slab double-free in case of duplicate  sysfs filename David Rientjes <rientjes@google.com> - 2015-07-16 02:30 +0200

#1185148 — Re: [PATCH 1/2] mm/slub: fix slab double-free in case of duplicate sysfs filename

On Tue, 14 Jul 2015, Konstantin Khlebnikov wrote:

> sysfs_slab_add() shouldn't call kobject_put at error path: this puts
> last reference of kmem-cache kobject and frees it. Kmem cache will be
> freed second time at error path in kmem_cache_create().
> 
> For example this happens when slub debug was enabled in runtime and
> somebody creates new kmem cache:
> 
> # echo 1 | tee /sys/kernel/slab/*/sanity_checks
> # modprobe configfs
> 
> "configfs_dir_cache" cannot be merged because existing slab have debug and
> cannot create new slab because unique name ":t-0000096" already taken.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>

Acked-by: David Rientjes <rientjes@google.com>
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