From: Tycho Andersen <tycho.andersen@canonical.com>
To: Jann Horn <jann@thejh.net>
Cc: Kees Cook <keescook@chromium.org>,
Andy Lutomirski <luto@amacapital.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>,
Borislav Petkov <bp@alien8.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Brian Gerst <brgerst@gmail.com>
Subject: Re: [PATCH 09/12] x86/process: Pin the target stack in get_wchan()
Date: Sun, 25 Sep 2016 23:10:53 -0600 [thread overview]
Message-ID: <20160926051053.GA6713@hopstrocity> (raw)
In-Reply-To: <20160923183443.GA3416@pc.thejh.net>
On Fri, Sep 23, 2016 at 08:34:43PM +0200, Jann Horn wrote:
> On Fri, Sep 23, 2016 at 11:28:26AM -0700, Kees Cook wrote:
> > Does CRIU use this? I wouldn't expect so, since they're using ptrace,
> > IIUC, to freeze/restore.
>
> As far as I can tell:
>
> parse_pid_stat() parses them into a struct proc_pid_stat as "esp" and "eip",
> but those struct members are never used (like, probably, most other members
> of that struct).
Yes, that's my reading of it too.
> child_opened_proc.c just opens /proc/%d/stat and then closes it again
> immediately.
This is just a test for ordering of things that are restored, and it
could use any file in /proc, stat was just convenient.
> So in summary: I don't think so.
Yep, agreed.
Tycho
next prev parent reply other threads:[~2016-09-26 5:11 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-13 21:29 [PATCH 00/12] thread_info cleanups and stack caching Andy Lutomirski
2016-09-13 21:29 ` [PATCH 01/12] x86/asm: Move 'status' from struct thread_info to struct thread_struct Andy Lutomirski
2016-09-15 10:41 ` [tip:x86/asm] x86/asm: Move the thread_info::status field to thread_struct tip-bot for Andy Lutomirski
2016-09-13 21:29 ` [PATCH 02/12] x86/entry: Get rid of pt_regs_to_thread_info() Andy Lutomirski
2016-09-15 6:21 ` Ingo Molnar
2016-09-15 10:42 ` [tip:x86/asm] " tip-bot for Linus Torvalds
2016-09-13 21:29 ` [PATCH 03/12] um: Stop conflating task_struct::stack with thread_info Andy Lutomirski
2016-09-15 6:21 ` Ingo Molnar
2016-09-15 10:42 ` [tip:x86/asm] um/Stop " tip-bot for Linus Torvalds
2016-09-13 21:29 ` [PATCH 04/12] sched: Allow putting thread_info into task_struct Andy Lutomirski
2016-09-15 10:43 ` [tip:x86/asm] sched/core: " tip-bot for Andy Lutomirski
2016-09-13 21:29 ` [PATCH 05/12] x86: Move " Andy Lutomirski
2016-09-15 10:43 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2016-09-13 21:29 ` [PATCH 06/12] sched: Add try_get_task_stack() and put_task_stack() Andy Lutomirski
2016-09-13 21:29 ` [PATCH 07/12] kthread: to_live_kthread() needs try_get_task_stack() Andy Lutomirski
2016-09-13 21:29 ` [PATCH 08/12] x86/dumpstack: Pin the target stack in save_stack_trace_tsk() Andy Lutomirski
2016-09-14 14:55 ` Josh Poimboeuf
2016-09-14 18:22 ` Andy Lutomirski
2016-09-14 18:35 ` Josh Poimboeuf
2016-09-15 18:04 ` Andy Lutomirski
2016-09-15 18:37 ` Josh Poimboeuf
2016-09-15 18:41 ` Andy Lutomirski
2016-09-15 19:19 ` Josh Poimboeuf
2016-09-16 7:47 ` Peter Zijlstra
2016-09-16 15:12 ` Andy Lutomirski
2016-09-16 15:31 ` Peter Zijlstra
2016-09-16 15:32 ` Andy Lutomirski
2016-09-16 16:35 ` Peter Zijlstra
2016-09-15 6:37 ` Ingo Molnar
[not found] ` <CA+55aFxt=HLrELBE=BXUrWdh6LYs4gtu9S=yCruiDffq4HN80w@mail.gmail.com>
2016-09-15 9:27 ` Ingo Molnar
2016-09-13 21:29 ` [PATCH 09/12] x86/process: Pin the target stack in get_wchan() Andy Lutomirski
2016-09-17 2:00 ` Jann Horn
2016-09-22 22:44 ` Andy Lutomirski
2016-09-22 22:50 ` Andy Lutomirski
2016-09-23 7:43 ` Jann Horn
2016-09-23 18:28 ` Kees Cook
2016-09-23 18:34 ` Jann Horn
2016-09-26 5:10 ` Tycho Andersen [this message]
2016-09-13 21:29 ` [PATCH 10/12] lib/syscall: Pin the task stack in collect_syscall() Andy Lutomirski
2016-09-13 21:29 ` [PATCH 11/12] sched: Free the stack early if CONFIG_THREAD_INFO_IN_TASK Andy Lutomirski
2016-09-13 21:29 ` [PATCH 12/12] fork: Cache two thread stacks per cpu if CONFIG_VMAP_STACK is set Andy Lutomirski
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