* [PATCH] ipcns: fix use after free in free_ipc_ns
@ 2011-03-25 6:28 Xiaotian Feng
0 siblings, 0 replies; only message in thread
From: Xiaotian Feng @ 2011-03-25 6:28 UTC (permalink / raw)
To: linux-kernel
Cc: Xiaotian Feng, Andrew Morton, Serge E. Hallyn, Eric W. Biederman,
David Howells, Daniel Lezcano
commit b515498 add a user namespace owner of ipc ns, but it also
introduced a use after free in free_ipc_ns.
Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Serge E. Hallyn" <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
---
ipc/namespace.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 3c3e522..8054c8e 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -104,7 +104,6 @@ static void free_ipc_ns(struct ipc_namespace *ns)
sem_exit_ns(ns);
msg_exit_ns(ns);
shm_exit_ns(ns);
- kfree(ns);
atomic_dec(&nr_ipc_ns);
/*
@@ -113,6 +112,7 @@ static void free_ipc_ns(struct ipc_namespace *ns)
*/
ipcns_notify(IPCNS_REMOVED);
put_user_ns(ns->user_ns);
+ kfree(ns);
}
/*
--
1.7.1
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