[<ffffffffa84b9f3e>] proc_pid_stack+0xae/0x100 [<ffffffffa84baf92>] proc_single_show+0x52/0x90 [<ffffffffa8465ed0>] seq_read+0x110/0x3f0 [<ffffffffa843d91f>] vfs_read+0x9f/0x170 [<ffffffffa843e7ef>] SyS_read+0x7f/0xf0 [<ffffffffa893b85b>] system_call_fastpath+0x22/0x27 [<ffffffffffffffff>] 0xffffffffffffffff