[PATCH 2/4] UBIFS: Add missing error handling in dump_lpt_leb()

[hujianyang <hujianyang@huawei.com>]

This patch checks the return value of ubifs_unpack_nnode().
If this function returns an error, @nnode may not be
initialized, so just print an error mesg and break.

Signed-off-by: hujianyang <hujianyang@huawei.com>
---
 fs/ubifs/lpt_commit.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 4b826ab..7e957b6 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -1941,6 +1941,11 @@ static void dump_lpt_leb(const struct ubifs_info *c, int lnum)
 				pr_err("LEB %d:%d, nnode, ",
 				       lnum, offs);
 			err = ubifs_unpack_nnode(c, p, &nnode);
+			if (err) {
+				pr_err("failed to unpack_node, error %d\n",
+				       err);
+				break;
+			}
 			for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
 				pr_cont("%d:%d", nnode.nbranch[i].lnum,
 				       nnode.nbranch[i].offs);
-- 
1.8.1.4