Re: [PATCH] MIPS: oops when show backtrace of all active cpu
From: Kevin Cernekee <cernekee@gmail.com>
Date: 2012-08-02 04:18:30
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lkml
On Wed, Aug 1, 2012 at 8:31 PM, Fan Du [off-list ref] wrote:
show_backtrace must have an valid task when calling unwind_stack, so fix it by checking first.
[...]
quoted hunk ↗ jump to hunk
--- 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/