linux-kernel - Re: [PATCH v5 2/2] extable: verify address is read-only

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Message-ID: <201704070155.EM9TWkdW%fengguang.wu@intel.com>
Date:   Fri, 7 Apr 2017 01:41:26 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Eddie Kovsky <ewk@...ovsky.org>
Cc:     kbuild-all@...org, jeyu@...hat.com, rusty@...tcorp.com.au,
        keescook@...omium.org, linux-kernel@...r.kernel.org,
        kernel-hardening@...ts.openwall.com
Subject: Re: [PATCH v5 2/2] extable: verify address is read-only

Hi Eddie,

[auto build test ERROR on next-20170330]
[cannot apply to linus/master linux/master jeyu/modules-next v4.9-rc8 v4.9-rc7 v4.9-rc6 v4.11-rc5]
[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/Eddie-Kovsky/module-verify-address-is-read-only/20170407-004322
config: i386-randconfig-x010-201714 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel/extable.c: In function 'core_kernel_rodata':
>> kernel/extable.c:169:29: error: '__start_ro_after_init' undeclared (first use in this function)
     if (addr >= (unsigned long)__start_ro_after_init &&
                                ^~~~~~~~~~~~~~~~~~~~~
   kernel/extable.c:169:29: note: each undeclared identifier is reported only once for each function it appears in
>> kernel/extable.c:170:28: error: '__end_ro_after_init' undeclared (first use in this function)
         addr < (unsigned long)__end_ro_after_init)
                               ^~~~~~~~~~~~~~~~~~~

vim +/__start_ro_after_init +169 kernel/extable.c

   163	int core_kernel_rodata(unsigned long addr)
   164	{
   165		if (addr >= (unsigned long)__start_rodata &&
   166		    addr < (unsigned long)__end_rodata)
   167			return 1;
   168	
 > 169		if (addr >= (unsigned long)__start_ro_after_init &&
 > 170		    addr < (unsigned long)__end_ro_after_init)
   171			return 1;
   172	
   173		return 0;

---
0-DAY kernel test infrastructure                Open Source Technology Center
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