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Re: [PATCH] lkdtm: add test for executing .rodata

From "PaX Team" <pageexec@freemail.hu>
Newsgroups linux.kernel
Subject Re: [PATCH] lkdtm: add test for executing .rodata
Date 2016-02-23 00:30 +0100
Message-ID <r585s-51i-9@gated-at.bofh.it> (permalink)
References <r3ua7-49t-39@gated-at.bofh.it> <r585s-51i-11@gated-at.bofh.it> <r55AB-2Tb-1@gated-at.bofh.it>
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On 22 Feb 2016 at 12:46, Kees Cook wrote:

> GCC really wants to declare the section. :(

hmm, i see, so how about going about it another way. instead of trying
to do this at compile/link time, do it an load/runtime. one way of doing
it would be to preserve a page in .rodata then map in a code page underneath
that holds your empty function (which you can generate from C). it'd be
somewhat similar to how the vsyscall page on amd64 is mapped (or used to
be mapped) from the kernel image into its userland visible place.

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[PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-16 22:50 +0100
  Re: [PATCH] lkdtm: add test for executing .rodata Laura Abbott <labbott@redhat.com> - 2016-02-17 02:10 +0100
    Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-17 21:30 +0100
      Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-17 22:10 +0100
      Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-18 11:40 +0100
        Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 12:40 +0100
          Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 13:00 +0100
          Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-18 13:10 +0100
            Re: [PATCH] lkdtm: add test for executing .rodata Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2016-02-18 13:50 +0100
              Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-18 21:10 +0100
          Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-18 22:30 +0100
            Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-22 21:50 +0100
              Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-23 00:30 +0100
                Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-23 22:00 +0100
                Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-23 23:10 +0100
                Re: [PATCH] lkdtm: add test for executing .rodata "PaX Team" <pageexec@freemail.hu> - 2016-02-23 23:10 +0100
              Re: [kernel-hardening] Re: [PATCH] lkdtm: add test for executing  .rodata David Brown <david.brown@linaro.org> - 2016-02-23 21:40 +0100
                Re: [kernel-hardening] Re: [PATCH] lkdtm: add test for executing .rodata Kees Cook <keescook@chromium.org> - 2016-02-23 22:00 +0100
  Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-17 22:50 +0100
  Re: [PATCH] lkdtm: add test for executing .rodata Arnd Bergmann <arnd@arndb.de> - 2016-02-17 22:50 +0100

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