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authorXiaotian Feng <dfeng@redhat.com>2011-03-25 01:57:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-25 17:45:16 -0700
commitbe4d250ab41e13f8f945be6896695e870b38ba31 (patch)
treea4c47d13bbd91ba05870f457b8063829ca81134f /ipc
parentc03e3126e4f9535f4983d727f036440255c43c82 (diff)
ipcns: fix use after free in free_ipc_ns()
commit b515498 ("userns: add a user namespace owner of ipc ns") added 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> Acked-by: "Serge E. Hallyn" <serge.hallyn@canonical.com> Acked-by: David Howells <dhowells@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Daniel Lezcano <daniel.lezcano@free.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/namespace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ipc/namespace.c b/ipc/namespace.c
index 3c3e5223e7e..8054c8e5faf 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);
}
/*