On 3/31/22 11:54, kernel test robot wrote:
Hi Waiman,
I love your patch! Perhaps something to improve:
[auto build test WARNING on hnaz-mm/master]
url: https://github.com/intel-lab-lkp/linux/commits/Waiman-Long/mm-sparsemem-Fix-mem_section-will-never-be-NULL-gcc-12-warning/20220331-050049
base: https://github.com/hnaz/linux-mm master
config: arm-randconfig-c024-20220330 (https://download.01.org/0day-ci/archive/20220331/202203312327.XGeCiD5T-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/2098f1d78cde338e81b3ba596ea39f37824e496e
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Waiman-Long/mm-sparsemem-Fix-mem_section-will-never-be-NULL-gcc-12-warning/20220331-050049
git checkout 2098f1d78cde338e81b3ba596ea39f37824e496e
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash security/keys/encrypted-keys/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
In file included from include/linux/gfp.h:6,
from include/linux/umh.h:4,
from include/linux/kmod.h:9,
from include/linux/module.h:17,
from security/keys/encrypted-keys/encrypted.c:15:
security/keys/encrypted-keys/encrypted.c: In function 'derived_key_encrypt.constprop':
include/linux/mmzone.h:1432:23: warning: array subscript 32 is outside array bounds of 'struct mem_section[32][1]' [-Warray-bounds]
1432 | unsigned long map = section->section_mem_map;
| ^~~
include/linux/mmzone.h:1390:27: note: while referencing 'mem_section'
1390 | extern struct mem_section mem_section[NR_SECTION_ROOTS][SECTIONS_PER_ROOT];
| ^~~~~~~~~~~
vim +1432 include/linux/mmzone.h
29751f6991e845 Andy Whitcroft 2005-06-23 1429
29751f6991e845 Andy Whitcroft 2005-06-23 1430 static inline struct page *__section_mem_map_addr(struct mem_section *section)
29751f6991e845 Andy Whitcroft 2005-06-23 1431 {
29751f6991e845 Andy Whitcroft 2005-06-23 @1432 unsigned long map = section->section_mem_map;
29751f6991e845 Andy Whitcroft 2005-06-23 1433 map &= SECTION_MAP_MASK;
29751f6991e845 Andy Whitcroft 2005-06-23 1434 return (struct page *)map;
29751f6991e845 Andy Whitcroft 2005-06-23 1435 }
29751f6991e845 Andy Whitcroft 2005-06-23 1436
I think this is a pre-existing warning. It is not caused by my patch,
but I will take a look what cause the warning.
Thanks,
Longman
