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Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address limit before returning to user-mode

From Russell King - ARM Linux <linux@armlinux.org.uk>
Newsgroups linux.kernel
Subject Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address limit before returning to user-mode
Date 2017-05-12 21:20 +0200
Message-ID <tGogy-Kn-9@gated-at.bofh.it> (permalink)
References (5 earlier) <tG60h-4yv-1@gated-at.bofh.it> <tGbjj-8cj-1@gated-at.bofh.it> <tGbsZ-8fz-1@gated-at.bofh.it> <tGbMm-8mq-3@gated-at.bofh.it> <tGo6R-EW-5@gated-at.bofh.it>
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On Fri, May 12, 2017 at 12:01:59PM -0700, Kees Cook wrote:
> Yeah, the risk for "corrupted addr_limit" is mainly a concern for
> archs with addr_limit on the kernel stack. If I'm reading things
> correctly, that means, from the archs I've been paying closer
> attention to, it's an issue for arm, mips, and powerpc:

I'd first want to uninline everything in uaccess.h first that makes
use of access_ok() - which I think is something that needs to happen
anyway.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.

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Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Thomas Garnier <thgarnie@google.com> - 2017-05-12 01:20 +0200
  Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Linus Torvalds <torvalds@linux-foundation.org> - 2017-05-12 01:50 +0200
    Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Martin Schwidefsky <schwidefsky@de.ibm.com> - 2017-05-12 07:30 +0200
      Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 07:40 +0200
        Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Martin Schwidefsky <schwidefsky@de.ibm.com> - 2017-05-12 08:00 +0200
          Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Linus Torvalds <torvalds@linux-foundation.org> - 2017-05-12 21:10 +0200
            Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 21:40 +0200
              Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-05-12 22:30 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Peter Zijlstra <peterz@infradead.org> - 2017-05-12 22:40 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-05-12 22:50 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 23:10 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 23:10 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Christoph Hellwig <hch@infradead.org> - 2017-05-13 09:30 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Al Viro <viro@ZenIV.linux.org.uk> - 2017-05-12 23:10 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Daniel Micay <danielmicay@gmail.com> - 2017-05-12 23:20 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 23:20 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Daniel Micay <danielmicay@gmail.com> - 2017-05-12 23:30 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Al Viro <viro@ZenIV.linux.org.uk> - 2017-05-12 23:50 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Rik van Riel <riel@redhat.com> - 2017-05-12 23:50 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Al Viro <viro@ZenIV.linux.org.uk> - 2017-05-13 01:00 +0200
                Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-13 00:00 +0200
          Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Kees Cook <keescook@chromium.org> - 2017-05-12 21:10 +0200
            Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Russell King - ARM Linux <linux@armlinux.org.uk> - 2017-05-12 21:20 +0200
        Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Ingo Molnar <mingo@kernel.org> - 2017-05-12 09:00 +0200
    Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Andy Lutomirski <luto@kernel.org> - 2017-05-12 08:20 +0200
    Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Ingo Molnar <mingo@kernel.org> - 2017-05-12 09:00 +0200
      Re: [kernel-hardening] Re: [PATCH v9 1/4] syscalls: Verify address  limit before returning to user-mode Thomas Garnier <thgarnie@google.com> - 2017-05-12 19:10 +0200

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