lxcfs/0010-fix-hang.patch

diff --git a/bindings.c b/bindings.c
index b921d7e..1023e7f 100644
--- a/bindings.c
+++ b/bindings.c
@@ -111,6 +111,7 @@ struct pidns_init_store {
 static struct pidns_init_store *pidns_hash_table[PIDNS_HASH_SIZE];
 static pthread_mutex_t pidns_store_mutex = PTHREAD_MUTEX_INITIALIZER;
 static pthread_mutex_t slurp_file_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t diskstats_mutex = PTHREAD_MUTEX_INITIALIZER;
 static void lock_mutex(pthread_mutex_t *l)
 {
 	int ret;
@@ -4002,6 +4003,16 @@ struct devinfo* container_dev_read(pid_t pid) {
 		return head;
 	}
 	if (child_pid == 0) {
+		/* Disallow signal reception in child process */
+		sigset_t oldset;
+		sigset_t newset;
+		sigemptyset(&newset);
+		sigaddset(&newset, SIGTERM);
+		sigaddset(&newset, SIGINT);
+		sigaddset(&newset, SIGHUP);
+		sigaddset(&newset, SIGQUIT);
+		sigprocmask(SIG_BLOCK,&newset,&oldset);
+
 		close(mypipe[0]);
 		stream[1] = fdopen(mypipe[1], "w");
 		if (stream[1] == NULL) {
@@ -4048,6 +4059,8 @@ child_out:
 		lxcfs_error("Error opening pipe for reading: %s\n", strerror(errno));
 		goto err;
 	}
+	wait_for_pid(child_pid);
+	child_pid = 0;
 	while (fscanf(stream[0], "%100s%d", dev_name, &dev_num) == 2) {
 			if (dev_num == 0) {
 				break;
@@ -4148,7 +4161,9 @@ static int proc_diskstats_read(char *buf, size_t size, off_t offset,
 	if (!f)
 		goto err;
 
+	lock_mutex(&diskstats_mutex);
 	container_devinfo = container_dev_read(initpid);
+	unlock_mutex(&diskstats_mutex);
 
 	while (getline(&line, &linelen, f) != -1) {
 		ssize_t l;