jbd2: Fix memory leak when verifying checksums in the journal

From: Theodore Ts'o <tytso@mit.edu>
    
Cc: Andreas Dilger <adilger@clusterfs.com>
Cc: Girish Shilamkar <girish@clusterfs.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

---

diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 5d0405a..7199db5 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -344,6 +344,7 @@ static int calc_chksums(journal_t *journal, struct buffer_head *bh,
 			*crc32_sum = crc32_be(*crc32_sum, (void *)obh->b_data,
 				     obh->b_size);
 		}
+		put_bh(obh);
 	}
 	return 0;
 }