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Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened usercopy feature

From Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups linux.kernel
Subject Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened usercopy feature
Date 2016-09-06 20:40 +0200
Message-ID <setrQ-5CI-45@gated-at.bofh.it> (permalink)
References <scVLz-7Si-25@gated-at.bofh.it> <scYq5-16w-19@gated-at.bofh.it> <sdXLk-1lQ-5@gated-at.bofh.it> <sesPd-55p-11@gated-at.bofh.it>
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On Tue, Sep 6, 2016 at 10:56 AM, Kees Cook <keescook@chromium.org> wrote:
>
> In the meantime, how about continuing to use a bounce buffer like
> already done in the vmalloc_or_module_addr() case immediately above?

Yes please. Let's not make up even more of the user access functions
with magical properties, for some special-case code in /proc/kcore.

             Linus

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[PATCH] fs/proc/kcore.c: Omit kernel text area for hardened usercopy feature Jiri Olsa <jolsa@kernel.org> - 2016-09-02 14:30 +0200
  Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Andi Kleen <andi@firstfloor.org> - 2016-09-02 17:20 +0200
    Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Jiri Olsa <jolsa@redhat.com> - 2016-09-02 18:20 +0200
    Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Jiri Olsa <jolsa@redhat.com> - 2016-09-05 10:50 +0200
      Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Andi Kleen <andi@firstfloor.org> - 2016-09-05 18:30 +0200
      Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Kees Cook <keescook@chromium.org> - 2016-09-06 20:00 +0200
        Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-06 20:40 +0200
          Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Andi Kleen <andi@firstfloor.org> - 2016-09-06 21:50 +0200
            Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-06 21:50 +0200
              Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Kees Cook <keescook@chromium.org> - 2016-09-07 19:20 +0200
                Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-07 19:30 +0200
        Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Jiri Olsa <jolsa@redhat.com> - 2016-09-07 09:40 +0200
          Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Andi Kleen <andi@firstfloor.org> - 2016-09-07 18:40 +0200
            Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-07 19:00 +0200
              Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Jiri Olsa <jolsa@redhat.com> - 2016-09-07 21:30 +0200
                Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Jiri Olsa <jolsa@redhat.com> - 2016-09-07 23:30 +0200
                Re: [PATCH] fs/proc/kcore.c: Omit kernel text area for hardened  usercopy feature Linus Torvalds <torvalds@linux-foundation.org> - 2016-09-08 01:00 +0200

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