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| author | Pavel Emelianov <xemul@openvz.org> | 2006-11-02 22:07:03 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-11-03 12:27:56 -0800 |
| commit | c7e12b838989b0e432c7a1cdf1e6c6fd936007f6 (patch) | |
| tree | 31a6eea1d9ace0b467ab6bb209dd6a883910d682 /ipc/util.h | |
| parent | 733b72c31efb0d6b29577655939ccfe835381b52 (diff) | |
| download | lwn-c7e12b838989b0e432c7a1cdf1e6c6fd936007f6.tar.gz lwn-c7e12b838989b0e432c7a1cdf1e6c6fd936007f6.zip | |
[PATCH] Fix ipc entries removal
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>
Diffstat (limited to 'ipc/util.h')
| -rw-r--r-- | ipc/util.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/ipc/util.h b/ipc/util.h index c8fd6b9d77b5..e3aa2c5c97dc 100644 --- a/ipc/util.h +++ b/ipc/util.h @@ -83,6 +83,18 @@ void* ipc_rcu_alloc(int size); void ipc_rcu_getref(void *ptr); void ipc_rcu_putref(void *ptr); +static inline void __ipc_fini_ids(struct ipc_ids *ids, + struct ipc_id_ary *entries) +{ + if (entries != &ids->nullentry) + ipc_rcu_putref(entries); +} + +static inline void ipc_fini_ids(struct ipc_ids *ids) +{ + __ipc_fini_ids(ids, ids->entries); +} + struct kern_ipc_perm* ipc_get(struct ipc_ids* ids, int id); struct kern_ipc_perm* ipc_lock(struct ipc_ids* ids, int id); void ipc_lock_by_ptr(struct kern_ipc_perm *ipcp); |