linux-kernel - Re: [PATCH v2 0/2] UBSan: run-time undefined behavior sanity checker

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Date:	Tue, 3 Nov 2015 18:35:38 +0100
From:	Dmitry Vyukov <dvyukov@...gle.com>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Andrey Ryabinin <a.ryabinin@...sung.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Jonathan Corbet <corbet@....net>,
	Michal Marek <mmarek@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Yury Gribov <y.gribov@...sung.com>,
	Konstantin Khlebnikov <koct9i@...il.com>,
	"x86@...nel.org" <x86@...nel.org>, linux-doc@...r.kernel.org,
	"open list:KERNEL BUILD + fi..." <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH v2 0/2] UBSan: run-time undefined behavior sanity checker

I guess just nobody reviewed this. I would like to see this merged as well.



On Tue, Nov 3, 2015 at 6:20 PM, Sasha Levin <sasha.levin@...cle.com> wrote:
> Anyone knows why wasn't this merged a year ago? I didn't see any review comments, and it
> ended up finding real bugs.
>
> On 11/14/2014 07:50 AM, Andrey Ryabinin wrote:
>> Next spin of UBSan and there are two patches from now.
>> "Two there should be; no more, no less. One to embody the UBSan,
>> the other to not deadlock it."
>>
>> Patches on top of v3.18-rc4. As usual they are available in git:
>>       git://github.com/aryabinin/linux ubsan/v2
>>
>> Changes since v1:
>>    - Refactoring and cleanups in lib/ubsan.c including Sasha's complains.
>>    - Some spelling fixes from Randy
>>    - Fixed possible memory corruption on 64 big endian machines, spotted by Rasmus.
>>    - Links to the relevant GCC documentation added into changelog (Peter).
>>    - Added documentation.
>>    - Fix deadlock caused by kernel/printk/printk.c instrumentation
>>         (patch "kernel: printk: specify alignment for struct printk_log").
>>    - Dropped useless 'Indirect call of a function through a function pointer of the wrong type'
>>      checker. GCC doesn't support this, and as clang manual says it's for C++ only.
>>    - Added checker for __builtin_unreachable() calls.
>>    - Removed redundant -fno-sanitize=float-cast-overflow from CFLAGS.
>>    - Added lock to prevent mixing reports.
>>
>> Andrey Ryabinin (2):
>>   kernel: printk: specify alignment for struct printk_log
>>   UBSan: run-time undefined behavior sanity checker
>>
>>  Documentation/ubsan.txt               |  69 +++++
>>  Makefile                              |  10 +-
>>  arch/x86/Kconfig                      |   1 +
>>  arch/x86/boot/Makefile                |   1 +
>>  arch/x86/boot/compressed/Makefile     |   1 +
>>  arch/x86/realmode/rm/Makefile         |   1 +
>>  arch/x86/vdso/Makefile                |   2 +
>>  drivers/firmware/efi/libstub/Makefile |   1 +
>>  include/linux/sched.h                 |   3 +
>>  kernel/printk/printk.c                |  10 +-
>>  lib/Kconfig.debug                     |  22 ++
>>  lib/Makefile                          |   3 +
>>  lib/ubsan.c                           | 567 ++++++++++++++++++++++++++++++++++
>>  lib/ubsan.h                           |  84 +++++
>>  scripts/Makefile.lib                  |   6 +
>>  15 files changed, 775 insertions(+), 6 deletions(-)
>>  create mode 100644 Documentation/ubsan.txt
>>  create mode 100644 lib/ubsan.c
>>  create mode 100644 lib/ubsan.h
>>
>
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