[<ffffffff8103a542>] save_stack_trace_tsk+0x22/0x40
[<ffffffff8126d1ee>] proc_pid_stack+0xae/0x100
[<ffffffff8126df0d>] proc_single_show+0x4d/0x80
[<ffffffff8122253a>] seq_read+0xfa/0x3a0
[<ffffffff811fe0ee>] vfs_read+0x9e/0x170
[<ffffffff811fecbf>] SyS_read+0x7f/0xe0
[<ffffffff816968c9>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff