Messages in this thread | | | Date | Wed, 15 Jul 2015 17:27:43 -0700 (PDT) | From | David Rientjes <> | Subject | Re: [PATCH 1/2] mm/slub: fix slab double-free in case of duplicate sysfs filename |
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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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