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Message-ID: <202204181840.J2i3sYYd-lkp@intel.com>
Date: Mon, 18 Apr 2022 18:44:23 +0800
From: kernel test robot <lkp@...el.com>
To: Yury Norov <yury.norov@...il.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [norov:bitmap 45/47] include/linux/bitmap.h:259:9: warning: 'memcpy'
forming offset [20, 23] is out of the bounds [0, 20]
tree: https://github.com/norov/linux bitmap
head: 45a9e3feb171ccf077979b7ff6a0c6a732cfc17b
commit: 1a21df17d726b4f3c19a148e10d09ec632603f1c [45/47] lib: add bitmap_{from,to}_arr64
config: arm-randconfig-c002-20220418 (https://download.01.org/0day-ci/archive/20220418/202204181840.J2i3sYYd-lkp@intel.com/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/norov/linux/commit/1a21df17d726b4f3c19a148e10d09ec632603f1c
git remote add norov https://github.com/norov/linux
git fetch --no-tags norov bitmap
git checkout 1a21df17d726b4f3c19a148e10d09ec632603f1c
# 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
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/rfkill.h:35,
from net/bluetooth/hci_core.c:29:
include/linux/bitmap.h: In function 'bitmap_from_u64':
include/linux/bitmap.h:305:25: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
305 | (const unsigned long *) (buf), (nbits))
| ^
include/linux/bitmap.h:615:16: note: in expansion of macro 'bitmap_from_arr64'
615 | return bitmap_from_arr64(dst, mask, 64);
| ^~~~~~~~~~~~~~~~~
In file included from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/lockdep.h:14,
from include/linux/mutex.h:17,
from include/linux/rfkill.h:35,
from net/bluetooth/hci_core.c:29:
In function 'bitmap_copy',
inlined from 'bitmap_copy_clear_tail' at include/linux/bitmap.h:268:2,
inlined from 'bitmap_from_u64' at include/linux/bitmap.h:615:9,
inlined from 'hci_bdaddr_list_add_with_flags' at net/bluetooth/hci_core.c:2156:2:
>> include/linux/bitmap.h:259:9: warning: 'memcpy' forming offset [20, 23] is out of the bounds [0, 20] [-Warray-bounds]
259 | memcpy(dst, src, len);
| ^~~~~~~~~~~~~~~~~~~~~
vim +/memcpy +259 include/linux/bitmap.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 254
^1da177e4c3f41 Linus Torvalds 2005-04-16 255 static inline void bitmap_copy(unsigned long *dst, const unsigned long *src,
8b4daad52fee77 Rasmus Villemoes 2015-02-12 256 unsigned int nbits)
^1da177e4c3f41 Linus Torvalds 2005-04-16 257 {
8b4daad52fee77 Rasmus Villemoes 2015-02-12 258 unsigned int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
^1da177e4c3f41 Linus Torvalds 2005-04-16 @259 memcpy(dst, src, len);
^1da177e4c3f41 Linus Torvalds 2005-04-16 260 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 261
:::::: The code at line 259 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2
:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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