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MIPS: Fix Magic SysRq L kernel crash.

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show_backtrace() was passed a NULL pointer which caused paging
request fail. Set to current task as other architectures (ARM,
etc) do when passed a NULL task pointer.

Signed-off-by: Vincent Wen <vincentwenlinux@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: cernekee@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/3524/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Vincent Wen 2012-07-19 09:11:16 +02:00 committed by Ralf Baechle
parent ca760ca523
commit e909be8252
1 changed files with 3 additions and 0 deletions
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3
arch/mips/kernel/traps.c
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@ -132,6 +132,9 @@ static void show_backtrace(struct task_struct *task, const struct pt_regs *regs)
unsigned long ra = regs->regs[31];
unsigned long pc = regs->cp0_epc;
if (!task)
task = current;
if (raw_show_trace || !__kernel_text_address(pc)) {
show_raw_backtrace(sp);
return;