On 02/06/2016 02:04 AM, Yang Shi wrote:
>
> #include <asm/irq.h>
> #include <asm/stacktrace.h>
> @@ -64,7 +65,9 @@ int notrace unwind_frame(struct task_struct *tsk, struct
> stackframe *frame)
> return -EINVAL;
>
> frame->sp = fp + 0x10;
> + kasan_disable_current();
> frame->fp = *(unsigned long *)(fp);
It would be better to use READ_ONCE_NOCHECK() here.
See f7d27c35ddff7 ("x86/mm, kasan: Silence KASAN warnings in get_wchan()")
which solves the same problem for x86.
> + kasan_enable_current();
> frame->pc = *(unsigned long *)(fp + 8);
Why you left frame->pc out of scope? This line could trigger kasan as well.
>
> #ifdef CONFIG_FUNCTION_GRAPH_TRACER
>
