UBIFS: fix error handling in dump_lpt_leb()

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 message and break.

Signed-off-by: hujianyang <hujianyang@huawei.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 45d4e96a6bac..ff47893ad5fd 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);