1 files changed, 4 insertions, 2 deletions

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 2eb55c3361a8..efd0ce9489ae 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -694,9 +694,11 @@ void jbd2_journal_commit_transaction(journal_t *journal)
                            the last tag we set up. */
 
                         tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG);
-
-                        jbd2_descriptor_block_csum_set(journal, descriptor);
 start_journal_io:
+                        if (descriptor)
+                                jbd2_descriptor_block_csum_set(journal,
+                                                        descriptor);
+
                         for (i = 0; i < bufs; i++) {
                                 struct buffer_head *bh = wbuf[i];
                                 /*