linux-kernel - Re: [PATCH 15/18] mm/vchecker: pass allocation caller address to vchecker hook

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Message-ID: <201712011049.7tjFbGGf%fengguang.wu@intel.com>
Date:   Fri, 1 Dec 2017 11:01:57 +0800
From:   kbuild test robot <lkp@...el.com>
To:     js1304@...il.com
Cc:     kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>, kasan-dev@...glegroups.com,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Namhyung Kim <namhyung@...nel.org>,
        Wengang Wang <wen.gang.wang@...cle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH 15/18] mm/vchecker: pass allocation caller address to
 vchecker hook

Hi Joonsoo,

I love your patch! Yet something to improve:

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.15-rc1 next-20171130]
[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/js1304-gmail-com/introduce-a-new-tool-valid-access-checker/20171201-090908
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-s0-201748 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/crypto.h:24:0,
                    from arch/x86/kernel/asm-offsets.c:9:
   include/linux/slab.h: In function 'kmem_cache_alloc_trace':
>> include/linux/slab.h:424:2: error: implicit declaration of function 'vchecker_kmalloc' [-Werror=implicit-function-declaration]
     vchecker_kmalloc(s, ret, size, _THIS_IP_);
     ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/vchecker_kmalloc +424 include/linux/slab.h

   416	
   417	#else /* CONFIG_TRACING */
   418	static __always_inline void *kmem_cache_alloc_trace(struct kmem_cache *s,
   419			gfp_t flags, size_t size)
   420	{
   421		void *ret = kmem_cache_alloc(s, flags);
   422	
   423		kasan_kmalloc(s, ret, size, flags);
 > 424		vchecker_kmalloc(s, ret, size, _THIS_IP_);
   425		return ret;
   426	}
   427	

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