diff --git a/kernel/padata.c b/kernel/padata.c
index 7bef7dae3db5..7f41426bf7a6 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -508,6 +508,13 @@ void __init padata_do_multithreaded(struct padata_mt_job *job)
 	ps.chunk_size = max(ps.chunk_size, job->min_chunk);
 	ps.chunk_size = roundup(ps.chunk_size, job->align);
 
+	/*
+	 * chunk_size can be 0 if the caller sets min_chunk to 0. So force it
+	 * to at least 1 to prevent divide-by-0 panic in padata_mt_helper().`
+	 */
+	if (!ps.chunk_size)
+		ps.chunk_size = 1U;
+
 	list_for_each_entry(pw, &works, pw_list)
 		queue_work(system_unbound_wq, &pw->pw_work);