From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com
Subject: Re: [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error
Date: Sat, 22 Aug 2026 02:13:17 +0800 [thread overview]
Message-ID: <202608220235.5cPUFtSW-lkp@intel.com> (raw)
::::::
:::::: Manual check reason: "linux-review patch is more than 7 days old, verify it wasn't already superseded"
::::::
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20260814051032.261320-1-dmarlin@redhat.com>
References: <20260814051032.261320-1-dmarlin@redhat.com>
TO: David Marlin <dmarlin@redhat.com>
TO: linux-bluetooth@vger.kernel.org
TO: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
CC: "Gustavo A . R . Silva" <gustavoars@kernel.org>
CC: David Marlin <dmarlin@redhat.com>
CC: Bastien Nocera <hadess@hadess.net>
Hi David,
kernel test robot noticed the following build errors:
[auto build test ERROR on bluetooth-next/master]
[also build test ERROR on bluetooth/master linus/master v7.2 next-20260820]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/David-Marlin/Bluetooth-hci-core-fix-declaration-does-not-declare-anything-error/20260814-001012
base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master
patch link: https://lore.kernel.org/r/20260814051032.261320-1-dmarlin%40redhat.com
patch subject: [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error
:::::: branch date: 32 hours ago
:::::: commit date: 32 hours ago
config: nios2-allmodconfig (https://download.01.org/0day-ci/archive/20260822/202608220235.5cPUFtSW-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260822/202608220235.5cPUFtSW-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/r/202608220235.5cPUFtSW-lkp@intel.com/
All errors (new ones prefixed by >>):
net/bluetooth/hci_codec.c: In function 'hci_read_supported_codecs':
>> net/bluetooth/hci_codec.c:151:9: error: aggregate value used where an integer was expected
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from ./arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from net/bluetooth/hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
net/bluetooth/hci_codec.c:151:24: note: in expansion of macro 'flex_array_size'
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
>> net/bluetooth/hci_codec.c:151:69: error: incompatible type for argument 1 of 'size_mul'
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
>> net/bluetooth/hci_codec.c:157:23: error: invalid operands to binary < (have 'int' and 'struct hci_std_codecs_hdr')
157 | for (i = 0; i < std_codecs->num; i++) {
| ^ ~~~~~~~~~~~~~~~
| |
| struct hci_std_codecs_hdr
net/bluetooth/hci_codec.c:164:9: error: aggregate value used where an integer was expected
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from ./arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from net/bluetooth/hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
net/bluetooth/hci_codec.c:164:23: note: in expansion of macro 'flex_array_size'
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
net/bluetooth/hci_codec.c:164:68: error: incompatible type for argument 1 of 'size_mul'
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
net/bluetooth/hci_codec.c: In function 'hci_read_supported_codecs_v2':
net/bluetooth/hci_codec.c:220:9: error: aggregate value used where an integer was expected
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from ./arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from net/bluetooth/hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_v2_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
net/bluetooth/hci_codec.c:220:24: note: in expansion of macro 'flex_array_size'
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
net/bluetooth/hci_codec.c:220:69: error: incompatible type for argument 1 of 'size_mul'
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_v2_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_v2_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
>> net/bluetooth/hci_codec.c:226:23: error: invalid operands to binary < (have 'int' and 'struct hci_std_codecs_v2_hdr')
226 | for (i = 0; i < std_codecs->num; i++) {
| ^ ~~~~~~~~~~~~~~~
| |
| struct hci_std_codecs_v2_hdr
net/bluetooth/hci_codec.c:232:9: error: aggregate value used where an integer was expected
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from ./arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from net/bluetooth/hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_v2_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
net/bluetooth/hci_codec.c:232:23: note: in expansion of macro 'flex_array_size'
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
net/bluetooth/hci_codec.c:232:68: error: incompatible type for argument 1 of 'size_mul'
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_v2_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_v2_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
--
hci_codec.c: In function 'hci_read_supported_codecs':
hci_codec.c:151:9: error: aggregate value used where an integer was expected
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
hci_codec.c:151:24: note: in expansion of macro 'flex_array_size'
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
hci_codec.c:151:69: error: incompatible type for argument 1 of 'size_mul'
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
hci_codec.c:157:23: error: invalid operands to binary < (have 'int' and 'struct hci_std_codecs_hdr')
157 | for (i = 0; i < std_codecs->num; i++) {
| ^ ~~~~~~~~~~~~~~~
| |
| struct hci_std_codecs_hdr
hci_codec.c:164:9: error: aggregate value used where an integer was expected
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
hci_codec.c:164:23: note: in expansion of macro 'flex_array_size'
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
hci_codec.c:164:68: error: incompatible type for argument 1 of 'size_mul'
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
hci_codec.c: In function 'hci_read_supported_codecs_v2':
hci_codec.c:220:9: error: aggregate value used where an integer was expected
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_v2_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
hci_codec.c:220:24: note: in expansion of macro 'flex_array_size'
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
hci_codec.c:220:69: error: incompatible type for argument 1 of 'size_mul'
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_v2_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_v2_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
hci_codec.c:226:23: error: invalid operands to binary < (have 'int' and 'struct hci_std_codecs_v2_hdr')
226 | for (i = 0; i < std_codecs->num; i++) {
| ^ ~~~~~~~~~~~~~~~
| |
| struct hci_std_codecs_v2_hdr
hci_codec.c:232:9: error: aggregate value used where an integer was expected
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~
In file included from include/linux/bits.h:32,
from include/linux/ratelimit_types.h:5,
from include/linux/printk.h:9,
from include/asm-generic/bug.h:31,
from arch/nios2/include/generated/asm/bug.h:1,
from include/linux/ktime.h:24,
from include/linux/poll.h:7,
from include/net/bluetooth/bluetooth.h:26,
from hci_codec.c:5:
>> include/linux/overflow.h:420:25: error: invalid operands to binary * (have 'struct hci_std_codecs_v2_hdr' and 'unsigned int')
420 | (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
| ~~~~~~~ ^
hci_codec.c:232:23: note: in expansion of macro 'flex_array_size'
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~
hci_codec.c:232:68: error: incompatible type for argument 1 of 'size_mul'
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ~~~~~~~~~~^~~~~
| |
| struct hci_std_codecs_v2_hdr
include/linux/overflow.h:421:26: note: in definition of macro 'flex_array_size'
421 | size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
| ^~~~~
include/linux/overflow.h:330:60: note: expected 'size_t' {aka 'unsigned int'} but argument is of type 'struct hci_std_codecs_v2_hdr'
330 | static __always_inline size_t __must_check size_mul(size_t factor1, size_t factor2)
| ~~~~~~~^~~~~~~
vim +420 include/linux/overflow.h
610b15c50e86eb Kees Cook 2018-05-07 405
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 406 /**
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 407 * flex_array_size() - Calculate size of a flexible array member
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 408 * within an enclosing structure.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 409 * @p: Pointer to the structure.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 410 * @member: Name of the flexible array member.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 411 * @count: Number of elements in the array.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 412 *
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 413 * Calculates size of a flexible array of @count number of @member
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 414 * elements, at the end of structure @p.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 415 *
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 416 * Return: number of bytes needed or SIZE_MAX on overflow.
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 417 */
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 418 #define flex_array_size(p, member, count) \
230f6fa2c1db6a Kees Cook 2022-02-09 419 __builtin_choose_expr(__is_constexpr(count), \
230f6fa2c1db6a Kees Cook 2022-02-09 @420 (count) * sizeof(*(p)->member) + __must_be_array((p)->member), \
230f6fa2c1db6a Kees Cook 2022-02-09 421 size_mul(count, sizeof(*(p)->member) + __must_be_array((p)->member)))
b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 422
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next reply other threads:[~2026-08-21 18:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-21 18:13 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2026-08-14 5:10 [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error David Marlin
2026-08-21 2:08 ` kernel test robot
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