From: Arvind Sankar <nivedita@alum.mit.edu>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Arvind Sankar <nivedita@alum.mit.edu>,
Ard Biesheuvel <ardb@kernel.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Kees Cook <keescook@chromium.org>, Ingo Molnar <mingo@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Collingbourne <pcc@google.com>,
James Morse <james.morse@arm.com>, Borislav Petkov <bp@suse.de>,
Ingo Molnar <mingo@redhat.com>,
Russell King <linux@armlinux.org.uk>,
Masahiro Yamada <masahiroy@kernel.org>,
Nathan Chancellor <natechancellor@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
the arch/x86 maintainers <x86@kernel.org>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Linux-Arch <linux-arch@vger.kernel.org>,
linux-efi <linux-efi@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
kernel-toolchains@vger.kernel.org,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Subject: Re: [PATCH v6 13/29] arm64/build: Assert for unwanted sections
Date: Tue, 27 Oct 2020 17:24:25 -0400 [thread overview]
Message-ID: <20201027212425.GD1833548@rani.riverdale.lan> (raw)
In-Reply-To: <CAKwvOdmrjeLpS8H_uf_cfbOYFvE-ZhOdJQ14o4VoNF8ugARA0Q@mail.gmail.com>
On Tue, Oct 27, 2020 at 01:40:43PM -0700, Nick Desaulniers wrote:
> On Tue, Oct 27, 2020 at 1:30 PM Arvind Sankar <nivedita@alum.mit.edu> wrote:
> >
> > On Tue, Oct 27, 2020 at 01:17:55PM -0700, Nick Desaulniers wrote:
> > > > > (I feel the same about there
> > > > > being an empty asm(); statement in the definition of asm_volatile_goto
> > > > > for compiler-gcc.h). Might be time to "fix the compiler."
> > > > >
> > > > > (It sounds like Arvind is both in agreement with my sentiment, and has
> > > > > the root cause).
> > > > >
> > Btw, the bug mentioned in asm_volatile_goto seems like its been fixed in
> > 4.9, so the hack could be dropped now?
>
> https://lore.kernel.org/lkml/20180907222109.163802-1-ndesaulniers@google.com/
>
> For the life of me I can't find Linus' response. Maybe he shot it
> down in the PR, but I can't find it...Miguel do you recall? I could
> paraphrase, but might be better to not rely on my memory.
> --
> Thanks,
> ~Nick Desaulniers
You couldn't find it in July either :)
https://lkml.org/lkml/2020/7/10/1026
Possibly he didn't like the version check? That should be unnecessary now.
WARNING: multiple messages have this Message-ID (diff)
From: Arvind Sankar <nivedita@alum.mit.edu>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
linux-efi <linux-efi@vger.kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Arvind Sankar <nivedita@alum.mit.edu>,
Ard Biesheuvel <ardb@kernel.org>,
Linux-Arch <linux-arch@vger.kernel.org>,
kernel-toolchains@vger.kernel.org,
Masahiro Yamada <masahiroy@kernel.org>,
the arch/x86 maintainers <x86@kernel.org>,
Russell King <linux@armlinux.org.uk>,
Ingo Molnar <mingo@kernel.org>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Ingo Molnar <mingo@redhat.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Borislav Petkov <bp@suse.de>, Kees Cook <keescook@chromium.org>,
Arnd Bergmann <arnd@arndb.de>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Nathan Chancellor <natechancellor@gmail.com>,
Peter Collingbourne <pcc@google.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
James Morse <james.morse@arm.com>
Subject: Re: [PATCH v6 13/29] arm64/build: Assert for unwanted sections
Date: Tue, 27 Oct 2020 17:24:25 -0400 [thread overview]
Message-ID: <20201027212425.GD1833548@rani.riverdale.lan> (raw)
In-Reply-To: <CAKwvOdmrjeLpS8H_uf_cfbOYFvE-ZhOdJQ14o4VoNF8ugARA0Q@mail.gmail.com>
On Tue, Oct 27, 2020 at 01:40:43PM -0700, Nick Desaulniers wrote:
> On Tue, Oct 27, 2020 at 1:30 PM Arvind Sankar <nivedita@alum.mit.edu> wrote:
> >
> > On Tue, Oct 27, 2020 at 01:17:55PM -0700, Nick Desaulniers wrote:
> > > > > (I feel the same about there
> > > > > being an empty asm(); statement in the definition of asm_volatile_goto
> > > > > for compiler-gcc.h). Might be time to "fix the compiler."
> > > > >
> > > > > (It sounds like Arvind is both in agreement with my sentiment, and has
> > > > > the root cause).
> > > > >
> > Btw, the bug mentioned in asm_volatile_goto seems like its been fixed in
> > 4.9, so the hack could be dropped now?
>
> https://lore.kernel.org/lkml/20180907222109.163802-1-ndesaulniers@google.com/
>
> For the life of me I can't find Linus' response. Maybe he shot it
> down in the PR, but I can't find it...Miguel do you recall? I could
> paraphrase, but might be better to not rely on my memory.
> --
> Thanks,
> ~Nick Desaulniers
You couldn't find it in July either :)
https://lkml.org/lkml/2020/7/10/1026
Possibly he didn't like the version check? That should be unnecessary now.
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-10-27 21:24 UTC|newest]
Thread overview: 160+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-21 19:42 [PATCH v6 00/29] Warn on orphan section placement Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-08-21 19:42 ` [PATCH v6 01/29] vmlinux.lds.h: Create COMMON_DISCARDS Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:48 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 02/29] vmlinux.lds.h: Add .gnu.version* to COMMON_DISCARDS Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:48 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 03/29] vmlinux.lds.h: Avoid KASAN and KCSAN's unwanted sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:48 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 04/29] vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:48 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 05/29] vmlinux.lds.h: Add .symtab, .strtab, and .shstrtab to ELF_DETAILS Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 06/29] vmlinux.lds.h: add PGO and AutoFDO input sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] vmlinux.lds.h: Add " tip-bot2 for Nick Desaulniers
2020-08-21 19:42 ` [PATCH v6 07/29] efi/libstub: Disable -mbranch-protection Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 08/29] arm64/mm: Remove needless section quotes Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 09/29] arm64/kernel: Remove needless Call Frame Information annotations Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 10/29] arm64/build: Remove .eh_frame* sections due to unwind tables Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 11/29] arm64/build: Use common DISCARDS in linker script Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 12/29] arm64/build: Add missing DWARF sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 13/29] arm64/build: Assert for unwanted sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-10-26 12:29 ` [PATCH v6 13/29] " Geert Uytterhoeven
2020-10-26 12:29 ` Geert Uytterhoeven
2020-10-26 13:29 ` Geert Uytterhoeven
2020-10-26 13:29 ` Geert Uytterhoeven
2020-10-26 16:01 ` Geert Uytterhoeven
2020-10-26 16:01 ` Geert Uytterhoeven
2020-10-26 17:38 ` Ard Biesheuvel
2020-10-26 17:38 ` Ard Biesheuvel
2020-10-26 17:43 ` Geert Uytterhoeven
2020-10-26 17:43 ` Geert Uytterhoeven
2020-10-26 17:48 ` Nick Desaulniers
2020-10-26 17:48 ` Nick Desaulniers
2020-10-26 17:53 ` Geert Uytterhoeven
2020-10-26 17:53 ` Geert Uytterhoeven
2020-10-27 8:37 ` Geert Uytterhoeven
2020-10-27 8:37 ` Geert Uytterhoeven
2020-10-27 19:25 ` Geert Uytterhoeven
2020-10-27 19:25 ` Geert Uytterhoeven
2020-10-27 19:33 ` Ard Biesheuvel
2020-10-27 19:33 ` Ard Biesheuvel
2020-10-27 20:00 ` Arvind Sankar
2020-10-27 20:00 ` Arvind Sankar
2020-10-27 20:12 ` Nick Desaulniers
2020-10-27 20:12 ` Nick Desaulniers
2020-10-27 20:15 ` Ard Biesheuvel
2020-10-27 20:15 ` Ard Biesheuvel
2020-10-27 20:17 ` Nick Desaulniers
2020-10-27 20:17 ` Nick Desaulniers
2020-10-27 20:30 ` Arvind Sankar
2020-10-27 20:30 ` Arvind Sankar
2020-10-27 20:40 ` Nick Desaulniers
2020-10-27 20:40 ` Nick Desaulniers
2020-10-27 21:24 ` Arvind Sankar [this message]
2020-10-27 21:24 ` Arvind Sankar
2020-10-27 20:28 ` Nick Desaulniers
2020-10-27 20:28 ` Nick Desaulniers
2020-10-27 20:32 ` Arvind Sankar
2020-10-27 20:32 ` Arvind Sankar
2020-10-27 20:36 ` Nick Desaulniers
2020-10-27 20:36 ` Nick Desaulniers
2020-10-28 21:36 ` Alexei Starovoitov
2020-10-28 21:36 ` Alexei Starovoitov
2020-10-27 8:51 ` Geert Uytterhoeven
2020-10-27 8:51 ` Geert Uytterhoeven
2020-10-27 10:08 ` Jean-Philippe Brucker
2020-10-27 10:08 ` Jean-Philippe Brucker
2020-10-27 10:20 ` Geert Uytterhoeven
2020-10-27 10:20 ` Geert Uytterhoeven
2020-10-27 11:29 ` Ard Biesheuvel
2020-10-27 11:29 ` Ard Biesheuvel
2020-10-27 11:53 ` Naresh Kamboju
2020-10-27 11:53 ` Naresh Kamboju
2020-10-27 13:56 ` Ard Biesheuvel
2020-10-27 13:56 ` Ard Biesheuvel
2020-08-21 19:42 ` [PATCH v6 14/29] arm64/build: Warn on orphan section placement Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-08-21 19:42 ` [PATCH v6 15/29] arm/build: Refactor linker script headers Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 16/29] arm/build: Explicitly keep .ARM.attributes sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 17/29] arm/build: Add missing sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:42 ` [PATCH v6 18/29] arm/build: Assert for unwanted sections Kees Cook
2020-08-21 19:42 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 19/29] arm/build: Warn on orphan section placement Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-08-21 19:43 ` [PATCH v6 20/29] arm/boot: Handle all sections explicitly Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 21/29] arm/boot: Warn on orphan section placement Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-08-21 19:43 ` [PATCH v6 22/29] x86/asm: Avoid generating unused kprobe sections Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 23/29] x86/build: Enforce an empty .got.plt section Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 24/29] x86/build: Assert for unwanted sections Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] x86/build: Add asserts " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 25/29] x86/build: Warn on orphan section placement Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-08-21 19:43 ` [PATCH v6 26/29] x86/boot/compressed: Reorganize zero-size section asserts Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 27/29] x86/boot/compressed: Remove, discard, or assert for unwanted sections Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-08-21 20:01 ` Arvind Sankar
2020-08-21 20:01 ` Arvind Sankar
2020-08-21 21:21 ` Kees Cook
2020-08-21 21:21 ` Kees Cook
2020-08-21 21:28 ` Arvind Sankar
2020-08-21 21:28 ` Arvind Sankar
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 28/29] x86/boot/compressed: Add missing debugging sections to output Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-09-01 11:47 ` [tip: core/build] " tip-bot2 for Kees Cook
2020-08-21 19:43 ` [PATCH v6 29/29] x86/boot/compressed: Warn on orphan section placement Kees Cook
2020-08-21 19:43 ` Kees Cook
2020-08-31 19:41 ` [PATCH v6 00/29] " Kees Cook
2020-08-31 19:41 ` Kees Cook
2020-09-01 7:11 ` Ingo Molnar
2020-09-01 7:11 ` Ingo Molnar
2020-09-01 7:59 ` Ingo Molnar
2020-09-01 7:59 ` Ingo Molnar
2020-09-01 8:16 ` Ingo Molnar
2020-09-01 8:16 ` Ingo Molnar
2020-09-01 15:17 ` Kees Cook
2020-09-01 15:17 ` Kees Cook
2020-09-01 18:02 ` Nick Desaulniers
2020-09-01 18:02 ` Nick Desaulniers
2020-09-01 23:18 ` Kees Cook
2020-09-01 23:18 ` Kees Cook
2020-09-01 23:54 ` Nick Desaulniers
2020-09-01 23:54 ` Nick Desaulniers
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