Commit be4d250a authored Mar 25, 2011 by Xiaotian Feng Committed by Linus Torvalds Mar 25, 2011

ipcns: fix use after free in free_ipc_ns()



commit b515498f ("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>

parent c03e3126

ipc/namespace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}

		/*