diff --git a/fs/bcachefs/journal_io.c b/fs/bcachefs/journal_io.c
index ccaafa90f4f4..fb35dd336331 100644
--- a/fs/bcachefs/journal_io.c
+++ b/fs/bcachefs/journal_io.c
@@ -708,6 +708,9 @@ static void journal_entry_dev_usage_to_text(struct printbuf *out, struct bch_fs
 		container_of(entry, struct jset_entry_dev_usage, entry);
 	unsigned i, nr_types = jset_entry_dev_usage_nr_types(u);
 
+	if (vstruct_bytes(entry) < sizeof(*u))
+		return;
+
 	prt_printf(out, "dev=%u", le32_to_cpu(u->dev));
 
 	printbuf_indent_add(out, 2);