Re: [PATCH] drivers/firewire: use struct_size over open coded arithmetic
From: kernel test robot
Date: Fri Jan 28 2022 - 09:54:34 EST
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on ieee1394-linux1394/for-next]
[also build test ERROR on v5.17-rc1 next-20220128]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/cgel-zte-gmail-com/drivers-firewire-use-struct_size-over-open-coded-arithmetic/20220128-160602
base: https://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394.git for-next
config: arm-randconfig-c002-20220124 (https://download.01.org/0day-ci/archive/20220128/202201282234.A43HZoSH-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/0day-ci/linux/commit/1567c3f747219c35e83d9c1f4ac3c3d36f447d90
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review cgel-zte-gmail-com/drivers-firewire-use-struct_size-over-open-coded-arithmetic/20220128-160602
git checkout 1567c3f747219c35e83d9c1f4ac3c3d36f447d90
# 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 drivers/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from include/linux/device.h:29,
from drivers/firewire/core-transaction.c:10:
drivers/firewire/core-transaction.c: In function 'allocate_request':
>> include/linux/overflow.h:326:32: error: invalid type argument of '->' (have 'struct fw_request')
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~
drivers/firewire/core-transaction.c:780:27: note: in expansion of macro 'struct_size'
780 | request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
| ^~~~~~~~~~~
In file included from include/linux/bits.h:22,
from include/linux/bitops.h:6,
from include/linux/kernel.h:12,
from include/asm-generic/bug.h:20,
from arch/arm/include/asm/bug.h:60,
from include/linux/bug.h:5,
from drivers/firewire/core-transaction.c:8:
include/linux/overflow.h:326:63: error: invalid type argument of '->' (have 'struct fw_request')
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/compiler.h:240:51: note: in expansion of macro '__same_type'
240 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~
include/linux/overflow.h:326:44: note: in expansion of macro '__must_be_array'
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
drivers/firewire/core-transaction.c:780:27: note: in expansion of macro 'struct_size'
780 | request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
| ^~~~~~~~~~~
include/linux/overflow.h:326:63: error: invalid type argument of '->' (have 'struct fw_request')
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~
include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO'
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/compiler.h:240:51: note: in expansion of macro '__same_type'
240 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~
include/linux/overflow.h:326:44: note: in expansion of macro '__must_be_array'
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
drivers/firewire/core-transaction.c:780:27: note: in expansion of macro 'struct_size'
780 | request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
| ^~~~~~~~~~~
include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant
16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
| ^
include/linux/compiler.h:240:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO'
240 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~~~~~~~
include/linux/overflow.h:326:44: note: in expansion of macro '__must_be_array'
326 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
drivers/firewire/core-transaction.c:780:27: note: in expansion of macro 'struct_size'
780 | request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
| ^~~~~~~~~~~
In file included from include/linux/device.h:29,
from drivers/firewire/core-transaction.c:10:
>> include/linux/overflow.h:327:28: error: invalid type argument of unary '*' (have 'struct fw_request')
327 | sizeof(*(p)))
| ^~~~
drivers/firewire/core-transaction.c:780:27: note: in expansion of macro 'struct_size'
780 | request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
| ^~~~~~~~~~~
vim +326 include/linux/overflow.h
610b15c50e86eb1 Kees Cook 2018-05-07 312
610b15c50e86eb1 Kees Cook 2018-05-07 313 /**
610b15c50e86eb1 Kees Cook 2018-05-07 314 * struct_size() - Calculate size of structure with trailing array.
610b15c50e86eb1 Kees Cook 2018-05-07 315 * @p: Pointer to the structure.
610b15c50e86eb1 Kees Cook 2018-05-07 316 * @member: Name of the array member.
b19d57d0f3cc6f1 Gustavo A. R. Silva 2020-06-08 317 * @count: Number of elements in the array.
610b15c50e86eb1 Kees Cook 2018-05-07 318 *
610b15c50e86eb1 Kees Cook 2018-05-07 319 * Calculates size of memory needed for structure @p followed by an
b19d57d0f3cc6f1 Gustavo A. R. Silva 2020-06-08 320 * array of @count number of @member elements.
610b15c50e86eb1 Kees Cook 2018-05-07 321 *
610b15c50e86eb1 Kees Cook 2018-05-07 322 * Return: number of bytes needed or SIZE_MAX on overflow.
610b15c50e86eb1 Kees Cook 2018-05-07 323 */
b19d57d0f3cc6f1 Gustavo A. R. Silva 2020-06-08 324 #define struct_size(p, member, count) \
b19d57d0f3cc6f1 Gustavo A. R. Silva 2020-06-08 325 __ab_c_size(count, \
610b15c50e86eb1 Kees Cook 2018-05-07 @326 sizeof(*(p)->member) + __must_be_array((p)->member),\
610b15c50e86eb1 Kees Cook 2018-05-07 @327 sizeof(*(p)))
610b15c50e86eb1 Kees Cook 2018-05-07 328
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