From: hujianyang <hujianyang@huawei.com>
Date: Wed, 11 Jun 2014 02:40:10 +0000 (+0800)
Subject: UBIFS: fix error handling in dump_lpt_leb()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5a95741a574f69c8219d3164d1fbf1c855566afe;p=linux-beck.git

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>
---

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);