From: kbuild test robot <lkp@intel.com>
To: Andrey Konovalov <andreyknvl@google.com>
Cc: kbuild-all@01.org, Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Christoph Lameter <cl@linux.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mark Rutland <mark.rutland@arm.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Dave Martin <dave.martin@arm.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Ingo Molnar <mingo@kernel.org>,
Paul Lawrence <paullawrence@google.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Arnd Bergmann <arnd@arndb.de>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kate Stewart <kstewart@linuxfoundation.org>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
kasan-dev@googlegroups.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-sparse@vger.kernel.org, linux-mm@kvack.org,
linux-kbuild@vger.kernel.org, Kostya Serebryany <kcc@google.com>,
Evgeniy Stepanov <eugenis@google.com>,
Lee Smith <Lee.Smith@arm.com>,
Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
Jacob Bramley <Jacob.Bramley@arm.com>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
Jann Horn <jannh@google.com>, Mark Brand <markbrand@google.com>,
Chintan Pandya <cpandya@codeaurora.org>,
Vishwath Mohan <vishwath@google.com>,
Andrey Konovalov <andreyknvl@google.com>
Subject: Re: [PATCH v2 3/3] kasan: fix krealloc handling for tag-based mode
Date: Thu, 3 Jan 2019 06:14:16 +0800 [thread overview]
Message-ID: <201901030638.jMo5cYap%fengguang.wu@intel.com> (raw)
In-Reply-To: <bc983dc45be2af41701ac3a88f154b5dd1459a26.1546450432.git.andreyknvl@google.com>
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Hi Andrey,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on next-20190102]
[cannot apply to v4.20]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Andrey-Konovalov/kasan-tag-based-mode-fixes/20190103-050707
config: x86_64-randconfig-x016-201900 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
mm/kasan/common.c: In function 'kasan_krealloc':
>> mm/kasan/common.c:525:3: warning: ignoring return value of 'kasan_kmalloc_large', declared with attribute warn_unused_result [-Wunused-result]
kasan_kmalloc_large(object, size, flags);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> mm/kasan/common.c:527:3: warning: ignoring return value of 'kasan_kmalloc', declared with attribute warn_unused_result [-Wunused-result]
kasan_kmalloc(page->slab_cache, object, size, flags, true);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/kasan_kmalloc_large +525 mm/kasan/common.c
514
515 void kasan_krealloc(const void *object, size_t size, gfp_t flags)
516 {
517 struct page *page;
518
519 if (unlikely(object == ZERO_SIZE_PTR))
520 return;
521
522 page = virt_to_head_page(object);
523
524 if (unlikely(!PageSlab(page)))
> 525 kasan_kmalloc_large(object, size, flags);
526 else
> 527 kasan_kmalloc(page->slab_cache, object, size, flags, true);
528 }
529
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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prev parent reply other threads:[~2019-01-02 22:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-02 17:36 [PATCH v2 0/3] kasan: tag-based mode fixes Andrey Konovalov
2019-01-02 17:36 ` [PATCH v2 1/3] kasan, arm64: use ARCH_SLAB_MINALIGN instead of manual aligning Andrey Konovalov
2019-01-02 20:14 ` Andrew Morton
2019-01-03 15:52 ` Will Deacon
2019-01-03 18:46 ` Andrey Konovalov
2019-01-02 17:36 ` [PATCH v2 2/3] kasan: make tag based mode work with CONFIG_HARDENED_USERCOPY Andrey Konovalov
2019-01-02 17:36 ` [PATCH v2 3/3] kasan: fix krealloc handling for tag-based mode Andrey Konovalov
2019-01-02 22:14 ` kbuild test robot [this message]
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