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[PATCH] Fix ipc entries removal

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Fix two issuses related to ipc_ids->entries freeing.

1. When freeing ipc namespace we need to free entries allocated
   with ipc_init_ids().

2. When removing old entries in grow_ary() ipc_rcu_putref()
   may be called on entries set to &ids->nullentry earlier in
   ipc_init_ids().
   This is almost impossible without namespaces, but with
   them this situation becomes possible.

Found during OpenVZ testing after obvious leaks in beancounters.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Cc: Kirill Korotaev <dev@openvz.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pavel Emelianov 2006-11-02 22:07:03 -08:00 • committed by Linus Torvalds
parent 733b72c31e
commit c7e12b8389
5 changed files with 16 additions and 1 deletions
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2
ipc/util.c
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@ -301,7 +301,7 @@ static int grow_ary(struct ipc_ids* ids, int newsize)
*/
rcu_assign_pointer(ids->entries, new);
ipc_rcu_putref(old);
__ipc_fini_ids(ids, old);
return newsize;
}