diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 499aa6f0fde53cd6551ab0380d5459fc849c403f..1e057b01b6484612eb44f719e8b9a30aae0ab12f 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -59,6 +59,7 @@ void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
 	printk("%sCall Trace:\n", log_lvl);
 
 	unwind_start(&state, task, regs, stack);
+	stack = stack ? : get_stack_pointer(task, regs);
 
 	/*
 	 * Iterate through the stacks, starting with the current stack pointer.