[<0000000000000000>] proc_pid_stack+0xae/0x100 [<0000000000000000>] proc_single_show+0x52/0x90 [<0000000000000000>] seq_read+0x110/0x420 [<0000000000000000>] vfs_read+0x9f/0x170 [<0000000000000000>] SyS_read+0x7f/0xf0 [<0000000000000000>] system_call_fastpath+0x22/0x27 [<0000000000000000>] 0xffffffffffffffff