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Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern versions of gcc

From Linus Torvalds <torvalds@linux-foundation.org>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern versions of gcc
Date 2016-08-29 17:40 +0200
Message-ID <sbwPg-BA-39@gated-at.bofh.it> (permalink)
References (6 earlier) <sapG9-7Ij-9@gated-at.bofh.it> <sapPQ-7Lt-15@gated-at.bofh.it> <sawxX-3Rz-3@gated-at.bofh.it> <sazPb-5US-7@gated-at.bofh.it> <sbw2S-62-31@gated-at.bofh.it>
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On Mon, Aug 29, 2016 at 7:48 AM, Josh Poimboeuf <jpoimboe@redhat.com> wrote:
>
> So I *think* your patch fixes the wrong problem.  That's probably at
> least somewhat my fault because I misunderstood the issue before and may
> have described it wrong at some point.
>
> AFAICT, gcc isn't doing anything wrong, and the false positives are
> "intentional".
>
> There are in fact two static warnings (which are being silenced for new
> versions of gcc):

[ snip snip details ]

Ok.

Color me convinced, I never even looked at the two different cases, I
thought it was just one issue.

Let's just remove the spurious false positive warning then, in order
to re-instate the *actual* warning that right now is disabled entirely
due to the unrelated false positives.

Thanks for looking into this. Would you happen to also have a patch
that can be applied? Hint hint..

               Linus

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Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-25 23:00 +0200
  Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern  versions of gcc Kees Cook <keescook@chromium.org> - 2016-08-26 04:30 +0200
    Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-26 06:00 +0200
      Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern  versions of gcc Kees Cook <keescook@chromium.org> - 2016-08-26 15:50 +0200
        Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-26 16:00 +0200
          Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-26 23:10 +0200
            Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-26 23:10 +0200
            Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern  versions of gcc Linus Torvalds <torvalds@linux-foundation.org> - 2016-08-27 02:40 +0200
              Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for  modern versions of gcc Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-29 16:50 +0200
                Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern  versions of gcc Linus Torvalds <torvalds@linux-foundation.org> - 2016-08-29 17:40 +0200
                [PATCH v2] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-29 19:10 +0200
                Re: [PATCH v2] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-29 20:10 +0200
                [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-30 15:10 +0200
                Re: [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Linus Torvalds <torvalds@linux-foundation.org> - 2016-08-30 19:10 +0200
                Re: [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Kees Cook <keescook@chromium.org> - 2016-08-30 20:20 +0200
                Re: [PATCH v3] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Josh Poimboeuf <jpoimboe@redhat.com> - 2016-08-30 21:10 +0200
                Re: [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Kees Cook <keescook@chromium.org> - 2016-08-30 21:30 +0200
                Re: [PATCH v3] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Al Viro <viro@ZenIV.linux.org.uk> - 2016-08-30 22:20 +0200
                Re: [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Kees Cook <keescook@chromium.org> - 2016-08-31 00:30 +0200
                Re: [PATCH v3] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Mark Rutland <mark.rutland@arm.com> - 2016-08-31 11:50 +0200
                Re: [PATCH v3] mm/usercopy: get rid of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Linus Torvalds <torvalds@linux-foundation.org> - 2016-08-30 20:20 +0200
                Re: [PATCH v3] mm/usercopy: get rid of  CONFIG_DEBUG_STRICT_USER_COPY_CHECKS Al Viro <viro@ZenIV.linux.org.uk> - 2016-08-30 20:20 +0200
                Re: [PATCH 2/2] mm/usercopy: enable usercopy size checking for modern  versions of gcc Kees Cook <keescook@chromium.org> - 2016-08-30 20:40 +0200

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