On 2012年08月02日 12:18, Kevin Cernekee wrote:

On Wed, Aug 1, 2012 at 8:31 PM, Fan Du[off-list ref]  wrote:

quoted

show_backtrace must have an valid task when calling unwind_stack,
so fix it by checking first.

[...]

quoted

--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c

@@ -151,6 +151,10 @@ static void show_backtrace(struct task_struct *task, const struct pt_regs *regs)
                 show_raw_backtrace(sp);
                 return;
         }
+
+       if (task == NULL)
+               task = current;
+
         printk("Call Trace:\n");
         do {
                 print_ip_sym(pc);

FYI, a slightly different version of this change was accepted:

https://patchwork.linux-mips.org/patch/3524/

Oh, Looks like I'm late :)
thanks anyway.


-- 

Love each day!
--fan