[kernel-hardening] Re: [PATCH v4 2/2] extable: verify address is read-only

kbuild test robot
2017-03-27T08:43:05Z

[-- Attachment #1: Type: text/plain, Size: 1941 bytes --]

Hi Eddie,

[auto build test ERROR on next-20170323]
[cannot apply to linus/master linux/master jeyu/modules-next v4.9-rc8 v4.9-rc7 v4.9-rc6 v4.11-rc4]
[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/20170327-142922
config: blackfin-BF561-EZKIT-SMP_defconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=blackfin

All errors (new ones prefixed by >>):

kernel/built-in.o: In function `core_kernel_rodata':
>> kernel/extable.c:169: undefined reference to `__start_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__start_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__end_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__end_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__start_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__start_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__end_data_ro_after_init'
>> kernel/extable.c:169: undefined reference to `__end_data_ro_after_init'

vim +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_data_ro_after_init &&
170 addr < (unsigned long)__end_data_ro_after_init)
171 return 1;
172

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 10729 bytes --]