diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index cb2c529a8f1b..a54146576c3f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2263,7 +2263,8 @@ jbd2_journal_initialize_fast_commit(journal_t *journal)
 	unsigned long long num_fc_blks;
 
 	num_fc_blks = jbd2_journal_get_num_fc_blks(sb);
-	if (journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS)
+	if (num_fc_blks > journal->j_last ||
+	    journal->j_last - num_fc_blks < JBD2_MIN_JOURNAL_BLOCKS)
 		return -ENOSPC;
 
 	/* Are we called twice? */