Merge branch 'linus' into omap-for-v3.8/cleanup-headers-prepare-multiplatform-v3

1 files changed, 11 insertions, 1 deletions

diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index eb00be20581..7b07cc0dfb7 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -71,12 +71,22 @@ err_alloc:
 	return NULL;
 }
 
+/* MAX_PID_NS_LEVEL is needed for limiting size of 'struct pid' */
+#define MAX_PID_NS_LEVEL 32
+
 static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_pid_ns)
 {
 	struct pid_namespace *ns;
 	unsigned int level = parent_pid_ns->level + 1;
-	int i, err = -ENOMEM;
+	int i;
+	int err;
+
+	if (level > MAX_PID_NS_LEVEL) {
+		err = -EINVAL;
+		goto out;
+	}
 
+	err = -ENOMEM;
 	ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL);
 	if (ns == NULL)
 		goto out;