tree 276a0323e0b25192fdb837475b816db3b3052cad
parent 326ba5010a5429a5a528b268b36a5900d4ab0eba
author Eric Dumazet <eric.dumazet@gmail.com> 1252006739 +0300
committer Pekka Enberg <penberg@cs.helsinki.fi> 1252006739 +0300

slub: Fix kmem_cache_destroy() with SLAB_DESTROY_BY_RCU

kmem_cache_destroy() should call rcu_barrier() *after* kmem_cache_close() and
*before* sysfs_slab_remove() or risk rcu_free_slab() being called after
kmem_cache is deleted (kfreed).

rmmod nf_conntrack can crash the machine because it has to kmem_cache_destroy()
a SLAB_DESTROY_BY_RCU enabled cache.

Cc: <stable@kernel.org>
Reported-by: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>