* Re: [PATCH] net/802: use struct_size over open coded arithmetic
[not found] <20220128080541.1211668-1-chi.minghao@zte.com.cn>
@ 2022-01-28 12:40 ` kernel test robot
2022-01-28 12:51 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: kernel test robot @ 2022-01-28 12:40 UTC (permalink / raw)
To: cgel.zte, davem
Cc: llvm, kbuild-all, kuba, netdev, linux-kernel, Minghao Chi,
Zeal Robot
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on net-next/master]
[also build test ERROR on net/master horms-ipvs/master linus/master 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/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 72d044e4bfa6bd9096536e2e1c62aecfe1a525e4
config: riscv-randconfig-r042-20220124 (https://download.01.org/0day-ci/archive/20220128/202201282017.0TQvVTtf-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4)
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
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/0day-ci/linux/commit/9b64e5078d3d779fc56432d43129479f63996c74
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review cgel-zte-gmail-com/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925
git checkout 9b64e5078d3d779fc56432d43129479f63996c74
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/net/wireless/ath/wcn36xx/ net/802/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
>> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:18: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~^
>> net/802/garp.c:187:17: error: indirection requires pointer operand ('unsigned char[]' invalid)
attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:14: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
^~~~~~~~~~~~
>> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:49: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~~~~~~~~~~~~~~~~~^~~~~~~~~
include/linux/compiler.h:258:59: note: expanded from macro '__must_be_array'
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/compiler_types.h:287:63: note: expanded from macro '__same_type'
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
^
include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO'
#define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
^
>> net/802/garp.c:187:17: error: member reference type 'struct garp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:49: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~~~~~~~~~~~~~~~~~^~~~~~~~~
include/linux/compiler.h:258:65: note: expanded from macro '__must_be_array'
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
include/linux/compiler_types.h:287:74: note: expanded from macro '__same_type'
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
^
include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO'
#define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
^
>> net/802/garp.c:187:17: error: indirection requires pointer operand ('struct garp_attr' invalid)
attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:195:14: note: expanded from macro 'struct_size'
sizeof(*(p)))
^~~~
5 errors generated.
--
>> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:18: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~^
>> net/802/mrp.c:276:17: error: indirection requires pointer operand ('unsigned char[]' invalid)
attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:14: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
^~~~~~~~~~~~
>> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:49: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~~~~~~~~~~~~~~~~~^~~~~~~~~
include/linux/compiler.h:258:59: note: expanded from macro '__must_be_array'
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
include/linux/compiler_types.h:287:63: note: expanded from macro '__same_type'
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
^
include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO'
#define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
^
>> net/802/mrp.c:276:17: error: member reference type 'struct mrp_attr' is not a pointer; did you mean to use '.'?
attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:49: note: expanded from macro 'struct_size'
sizeof(*(p)->member) + __must_be_array((p)->member),\
~~~~~~~~~~~~~~~~~~~^~~~~~~~~
include/linux/compiler.h:258:65: note: expanded from macro '__must_be_array'
#define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
include/linux/compiler_types.h:287:74: note: expanded from macro '__same_type'
#define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
^
include/linux/build_bug.h:16:62: note: expanded from macro 'BUILD_BUG_ON_ZERO'
#define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
^
>> net/802/mrp.c:276:17: error: indirection requires pointer operand ('struct mrp_attr' invalid)
attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:195:14: note: expanded from macro 'struct_size'
sizeof(*(p)))
^~~~
5 errors generated.
vim +187 net/802/garp.c
166
167 static struct garp_attr *garp_attr_create(struct garp_applicant *app,
168 const void *data, u8 len, u8 type)
169 {
170 struct rb_node *parent = NULL, **p = &app->gid.rb_node;
171 struct garp_attr *attr;
172 int d;
173
174 while (*p) {
175 parent = *p;
176 attr = rb_entry(parent, struct garp_attr, node);
177 d = garp_attr_cmp(attr, data, len, type);
178 if (d > 0)
179 p = &parent->rb_left;
180 else if (d < 0)
181 p = &parent->rb_right;
182 else {
183 /* The attribute already exists; re-use it. */
184 return attr;
185 }
186 }
> 187 attr = kmalloc(struct_size(*attr, data, len), GFP_ATOMIC);
188 if (!attr)
189 return attr;
190 attr->state = GARP_APPLICANT_VO;
191 attr->type = type;
192 attr->dlen = len;
193 memcpy(attr->data, data, len);
194
195 rb_link_node(&attr->node, parent, p);
196 rb_insert_color(&attr->node, &app->gid);
197 return attr;
198 }
199
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] net/802: use struct_size over open coded arithmetic
[not found] <20220128080541.1211668-1-chi.minghao@zte.com.cn>
2022-01-28 12:40 ` kernel test robot
@ 2022-01-28 12:51 ` kernel test robot
1 sibling, 0 replies; 3+ messages in thread
From: kernel test robot @ 2022-01-28 12:51 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 7818 bytes --]
Hi,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on net-next/master]
[also build test ERROR on net/master horms-ipvs/master linus/master 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/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 72d044e4bfa6bd9096536e2e1c62aecfe1a525e4
config: x86_64-randconfig-a015 (https://download.01.org/0day-ci/archive/20220128/202201282010.gkSF8kZF-lkp(a)intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/0day-ci/linux/commit/9b64e5078d3d779fc56432d43129479f63996c74
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review cgel-zte-gmail-com/net-802-use-struct_size-over-open-coded-arithmetic/20220128-160925
git checkout 9b64e5078d3d779fc56432d43129479f63996c74
# save the config file to linux build tree
mkdir build_dir
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from include/linux/mm.h:30,
from arch/x86/include/asm/cacheflush.h:5,
from include/linux/cacheflush.h:5,
from include/linux/highmem.h:8,
from include/linux/bvec.h:10,
from include/linux/skbuff.h:17,
from net/802/mrp.c:12:
net/802/mrp.c: In function 'mrp_attr_create':
>> include/linux/overflow.h:194:18: error: invalid type argument of '->' (have 'struct mrp_attr')
194 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~
net/802/mrp.c:276:17: note: in expansion of macro 'struct_size'
276 | attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
| ^~~~~~~~~~~
In file included from include/linux/container_of.h:5,
from include/linux/kernel.h:21,
from net/802/mrp.c:10:
include/linux/overflow.h:194:49: error: invalid type argument of '->' (have 'struct mrp_attr')
194 | 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:258:46: note: in expansion of macro '__same_type'
258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~
include/linux/overflow.h:194:30: note: in expansion of macro '__must_be_array'
194 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
net/802/mrp.c:276:17: note: in expansion of macro 'struct_size'
276 | attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
| ^~~~~~~~~~~
include/linux/overflow.h:194:49: error: invalid type argument of '->' (have 'struct mrp_attr')
194 | 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:258:46: note: in expansion of macro '__same_type'
258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~
include/linux/overflow.h:194:30: note: in expansion of macro '__must_be_array'
194 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
net/802/mrp.c:276:17: note: in expansion of macro 'struct_size'
276 | attr = kmalloc(struct_size(*attr, value, len), 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:258:28: note: in expansion of macro 'BUILD_BUG_ON_ZERO'
258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
| ^~~~~~~~~~~~~~~~~
include/linux/overflow.h:194:30: note: in expansion of macro '__must_be_array'
194 | sizeof(*(p)->member) + __must_be_array((p)->member),\
| ^~~~~~~~~~~~~~~
net/802/mrp.c:276:17: note: in expansion of macro 'struct_size'
276 | attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
| ^~~~~~~~~~~
In file included from include/linux/mm.h:30,
from arch/x86/include/asm/cacheflush.h:5,
from include/linux/cacheflush.h:5,
from include/linux/highmem.h:8,
from include/linux/bvec.h:10,
from include/linux/skbuff.h:17,
from net/802/mrp.c:12:
>> include/linux/overflow.h:195:14: error: invalid type argument of unary '*' (have 'struct mrp_attr')
195 | sizeof(*(p)))
| ^~~~
net/802/mrp.c:276:17: note: in expansion of macro 'struct_size'
276 | attr = kmalloc(struct_size(*attr, value, len), GFP_ATOMIC);
| ^~~~~~~~~~~
vim +194 include/linux/overflow.h
610b15c50e86eb Kees Cook 2018-05-07 180
610b15c50e86eb Kees Cook 2018-05-07 181 /**
610b15c50e86eb Kees Cook 2018-05-07 182 * struct_size() - Calculate size of structure with trailing array.
610b15c50e86eb Kees Cook 2018-05-07 183 * @p: Pointer to the structure.
610b15c50e86eb Kees Cook 2018-05-07 184 * @member: Name of the array member.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 185 * @count: Number of elements in the array.
610b15c50e86eb Kees Cook 2018-05-07 186 *
610b15c50e86eb Kees Cook 2018-05-07 187 * Calculates size of memory needed for structure @p followed by an
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 188 * array of @count number of @member elements.
610b15c50e86eb Kees Cook 2018-05-07 189 *
610b15c50e86eb Kees Cook 2018-05-07 190 * Return: number of bytes needed or SIZE_MAX on overflow.
610b15c50e86eb Kees Cook 2018-05-07 191 */
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 192 #define struct_size(p, member, count) \
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 193 __ab_c_size(count, \
610b15c50e86eb Kees Cook 2018-05-07 @194 sizeof(*(p)->member) + __must_be_array((p)->member),\
610b15c50e86eb Kees Cook 2018-05-07 @195 sizeof(*(p)))
610b15c50e86eb Kees Cook 2018-05-07 196
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
^ permalink raw reply [flat|nested] 3+ messages in thread