[PATCH 1/4] UBIFS: Add missing error handling in create_default_filesystem()

[hujianyang]

In the end of create_default_filesystem(), we need to check
the return value of ubifs_write_node() to ensure if we have
successfully written the cs_node.

Signed-off-by: hujianyang <hujianyang at huawei.com>
---
 fs/ubifs/sb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
index 4c37607..7ba1378 100644
--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -332,6 +332,8 @@ static int create_default_filesystem(struct ubifs_info *c)
 	cs->ch.node_type = UBIFS_CS_NODE;
 	err = ubifs_write_node(c, cs, UBIFS_CS_NODE_SZ, UBIFS_LOG_LNUM, 0);
 	kfree(cs);
+	if (err)
+		return err;

 	ubifs_msg("default file-system created");
 	return 0;
-- 
1.8.1.4