[PATCH 4/6] udf: check if udf_load_logicalvol failed

[marcin.slusarz@gmail.com]

udf_load_logicalvol may fail eg in out of memory conditions - check it
and propagate error further

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
CC: Ben Fennema <bfennema@falcon.csc.calpoly.edu>
CC: Jan Kara <jack@suse.cz>
CC: Christoph Hellwig <hch@infradead.org>
---
 fs/udf/super.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 0ea34c5..f138309 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1183,6 +1183,7 @@ static int udf_process_sequence(struct super_block *sb, long block,
 	uint32_t vdsn;
 	uint16_t ident;
 	long next_s = 0, next_e = 0;
+	int ret;
 
 	memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
 
@@ -1258,7 +1259,11 @@ static int udf_process_sequence(struct super_block *sb, long block,
 			if (i == VDS_POS_PRIMARY_VOL_DESC) {
 				udf_load_pvoldesc(sb, bh);
 			} else if (i == VDS_POS_LOGICAL_VOL_DESC) {
-				udf_load_logicalvol(sb, bh, fileset); /* TODO: check return value */
+				ret = udf_load_logicalvol(sb, bh, fileset);
+				if (ret != 0) {
+					brelse(bh);
+					return ret;
+				}
 			} else if (i == VDS_POS_PARTITION_DESC) {
 				struct buffer_head *bh2 = NULL;
 				if (udf_load_partdesc(sb, bh)) {
-- 
1.5.3.4