From 7d5dd82a059bcc2948f733750408168989dcd820 Mon Sep 17 00:00:00 2001
From: ngkaho1234 <ngkaho1234@gmail.com>
Date: Tue, 1 Dec 2015 16:31:24 +0000
Subject: [PATCH] ext4_journal: do simple verification on jbd superblock.

---
 lwext4/ext4_journal.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lwext4/ext4_journal.c b/lwext4/ext4_journal.c
index e798590..83647b7 100644
--- a/lwext4/ext4_journal.c
+++ b/lwext4/ext4_journal.c
@@ -150,6 +150,12 @@ int jbd_get_fs(struct ext4_fs *fs,
 	if (rc != EOK) {
 		memset(jbd_fs, 0, sizeof(struct jbd_fs));
 		ext4_fs_put_inode_ref(&jbd_fs->inode_ref);
+		return rc;
+	}
+	if (!jbd_verify_sb(&jbd_fs->sb)) {
+		memset(jbd_fs, 0, sizeof(struct jbd_fs));
+		ext4_fs_put_inode_ref(&jbd_fs->inode_ref);
+		rc = EIO;
 	}
 
 	return rc;