* [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error
@ 2026-08-14 5:10 David Marlin
2026-08-21 2:08 ` kernel test robot
0 siblings, 1 reply; 3+ messages in thread
From: David Marlin @ 2026-08-14 5:10 UTC (permalink / raw)
To: linux-bluetooth, Luiz Augusto von Dentz
Cc: Gustavo A . R . Silva, David Marlin, Bastien Nocera
A recent build attempt, using gcc-14.4 on RHEL-10, produced the
following errors:
In file included from ./include/net/bluetooth/hci_core.h:35,
from net/bluetooth/hci_core.c:39:
./include/net/bluetooth/hci.h:1476:34: error: declaration does not
declare anything [-Werror]
1476 | struct hci_std_codecs_hdr;
| ^
./include/net/bluetooth/hci.h:1477:17: error: flexible array member in a
struct with no named members
1477 | __u8 codec[];
| ^~~~~
./include/net/bluetooth/hci.h:1516:37: error: declaration does not
declare anything [-Werror]
1516 | struct hci_std_codecs_v2_hdr;
| ^
./include/net/bluetooth/hci.h:1517:33: error: flexible array member in a
struct with no named members
1517 | struct hci_std_codec_v2 codec[];
| ^~~~~
cc1: all warnings being treated as errors
Adding a variable name (e.g., 'num') to each of the above struct definitions
avoids the error without changing the layout of the struct.
Fixes: a0cff16d0f6e ("Bluetooth: hci.h: Avoid a couple -Wflex-array-member-not-at-end warnings")
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: David Marlin <dmarlin@redhat.com>
---
include/net/bluetooth/hci.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 1641d879dbda..5ccc4545e380 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1472,7 +1472,7 @@ struct hci_std_codecs_hdr {
} __packed;
struct hci_std_codecs {
- struct hci_std_codecs_hdr;
+ struct hci_std_codecs_hdr num;
__u8 codec[];
} __packed;
@@ -1512,7 +1512,7 @@ struct hci_std_codecs_v2_hdr {
} __packed;
struct hci_std_codecs_v2 {
- struct hci_std_codecs_v2_hdr;
+ struct hci_std_codecs_v2_hdr num;
struct hci_std_codec_v2 codec[];
} __packed;
--
2.55.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error
2026-08-14 5:10 David Marlin
@ 2026-08-21 2:08 ` kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2026-08-21 2:08 UTC (permalink / raw)
To: David Marlin, linux-bluetooth, Luiz Augusto von Dentz
Cc: llvm, oe-kbuild-all, Gustavo A . R . Silva, David Marlin,
Bastien Nocera
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-20260819]
[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
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260821/202608211016.aKSwZC8Y-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 935bfc708590c60147a79c7df145bb6e68b1d388)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260821/202608211016.aKSwZC8Y-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/oe-kbuild-all/202608211016.aKSwZC8Y-lkp@intel.com/
All errors (new ones prefixed by >>):
>> net/bluetooth/hci_codec.c:151:17: error: operand of type 'struct hci_std_codecs_hdr' where arithmetic or pointer type is required
151 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:419:24: note: expanded from macro 'flex_array_size'
419 | __builtin_choose_expr(__is_constexpr(count), \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:323:47: note: expanded from macro '__is_constexpr'
323 | (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
| ^~~
>> net/bluetooth/hci_codec.c:157:16: error: invalid operands to binary expression ('__u8' (aka 'unsigned char') and 'struct hci_std_codecs_hdr')
157 | for (i = 0; i < std_codecs->num; i++) {
| ~ ^ ~~~~~~~~~~~~~~~
net/bluetooth/hci_codec.c:164:16: error: operand of type 'struct hci_std_codecs_hdr' where arithmetic or pointer type is required
164 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:419:24: note: expanded from macro 'flex_array_size'
419 | __builtin_choose_expr(__is_constexpr(count), \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:323:47: note: expanded from macro '__is_constexpr'
323 | (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
| ^~~
>> net/bluetooth/hci_codec.c:220:17: error: operand of type 'struct hci_std_codecs_v2_hdr' where arithmetic or pointer type is required
220 | if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:419:24: note: expanded from macro 'flex_array_size'
419 | __builtin_choose_expr(__is_constexpr(count), \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:323:47: note: expanded from macro '__is_constexpr'
323 | (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
| ^~~
>> net/bluetooth/hci_codec.c:226:16: error: invalid operands to binary expression ('__u8' (aka 'unsigned char') and 'struct hci_std_codecs_v2_hdr')
226 | for (i = 0; i < std_codecs->num; i++) {
| ~ ^ ~~~~~~~~~~~~~~~
net/bluetooth/hci_codec.c:232:16: error: operand of type 'struct hci_std_codecs_v2_hdr' where arithmetic or pointer type is required
232 | skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/overflow.h:419:24: note: expanded from macro 'flex_array_size'
419 | __builtin_choose_expr(__is_constexpr(count), \
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:323:47: note: expanded from macro '__is_constexpr'
323 | (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
| ^~~
6 errors generated.
vim +151 net/bluetooth/hci_codec.c
8961987f3f5fa2f Kiran K 2021-09-07 119
8961987f3f5fa2f Kiran K 2021-09-07 120 void hci_read_supported_codecs(struct hci_dev *hdev)
8961987f3f5fa2f Kiran K 2021-09-07 121 {
8961987f3f5fa2f Kiran K 2021-09-07 122 struct sk_buff *skb;
8961987f3f5fa2f Kiran K 2021-09-07 123 struct hci_rp_read_local_supported_codecs *rp;
8961987f3f5fa2f Kiran K 2021-09-07 124 struct hci_std_codecs *std_codecs;
8961987f3f5fa2f Kiran K 2021-09-07 125 struct hci_vnd_codecs *vnd_codecs;
8961987f3f5fa2f Kiran K 2021-09-07 126 struct hci_op_read_local_codec_caps caps;
8961987f3f5fa2f Kiran K 2021-09-07 127 __u8 i;
8961987f3f5fa2f Kiran K 2021-09-07 128
828cea2b71de501 Chethan T N 2022-11-22 129 skb = __hci_cmd_sync_sk(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
828cea2b71de501 Chethan T N 2022-11-22 130 0, HCI_CMD_TIMEOUT, NULL);
8961987f3f5fa2f Kiran K 2021-09-07 131
8961987f3f5fa2f Kiran K 2021-09-07 132 if (IS_ERR(skb)) {
8961987f3f5fa2f Kiran K 2021-09-07 133 bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
8961987f3f5fa2f Kiran K 2021-09-07 134 PTR_ERR(skb));
8961987f3f5fa2f Kiran K 2021-09-07 135 return;
8961987f3f5fa2f Kiran K 2021-09-07 136 }
8961987f3f5fa2f Kiran K 2021-09-07 137
8961987f3f5fa2f Kiran K 2021-09-07 138 if (skb->len < sizeof(*rp))
8961987f3f5fa2f Kiran K 2021-09-07 139 goto error;
8961987f3f5fa2f Kiran K 2021-09-07 140
8961987f3f5fa2f Kiran K 2021-09-07 141 rp = (void *)skb->data;
8961987f3f5fa2f Kiran K 2021-09-07 142
8961987f3f5fa2f Kiran K 2021-09-07 143 if (rp->status)
8961987f3f5fa2f Kiran K 2021-09-07 144 goto error;
8961987f3f5fa2f Kiran K 2021-09-07 145
8961987f3f5fa2f Kiran K 2021-09-07 146 skb_pull(skb, sizeof(rp->status));
8961987f3f5fa2f Kiran K 2021-09-07 147
8961987f3f5fa2f Kiran K 2021-09-07 148 std_codecs = (void *)skb->data;
8961987f3f5fa2f Kiran K 2021-09-07 149
8961987f3f5fa2f Kiran K 2021-09-07 150 /* validate codecs length before accessing */
8961987f3f5fa2f Kiran K 2021-09-07 @151 if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
8961987f3f5fa2f Kiran K 2021-09-07 152 + sizeof(std_codecs->num))
8961987f3f5fa2f Kiran K 2021-09-07 153 goto error;
8961987f3f5fa2f Kiran K 2021-09-07 154
8961987f3f5fa2f Kiran K 2021-09-07 155 /* enumerate codec capabilities of standard codecs */
8961987f3f5fa2f Kiran K 2021-09-07 156 memset(&caps, 0, sizeof(caps));
8961987f3f5fa2f Kiran K 2021-09-07 @157 for (i = 0; i < std_codecs->num; i++) {
8961987f3f5fa2f Kiran K 2021-09-07 158 caps.id = std_codecs->codec[i];
8961987f3f5fa2f Kiran K 2021-09-07 159 caps.direction = 0x00;
828cea2b71de501 Chethan T N 2022-11-22 160 hci_read_codec_capabilities(hdev,
828cea2b71de501 Chethan T N 2022-11-22 161 LOCAL_CODEC_ACL_MASK | LOCAL_CODEC_SCO_MASK, &caps);
8961987f3f5fa2f Kiran K 2021-09-07 162 }
8961987f3f5fa2f Kiran K 2021-09-07 163
8961987f3f5fa2f Kiran K 2021-09-07 164 skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
8961987f3f5fa2f Kiran K 2021-09-07 165 + sizeof(std_codecs->num));
8961987f3f5fa2f Kiran K 2021-09-07 166
8961987f3f5fa2f Kiran K 2021-09-07 167 vnd_codecs = (void *)skb->data;
8961987f3f5fa2f Kiran K 2021-09-07 168
8961987f3f5fa2f Kiran K 2021-09-07 169 /* validate vendor codecs length before accessing */
8961987f3f5fa2f Kiran K 2021-09-07 170 if (skb->len <
8961987f3f5fa2f Kiran K 2021-09-07 171 flex_array_size(vnd_codecs, codec, vnd_codecs->num)
8961987f3f5fa2f Kiran K 2021-09-07 172 + sizeof(vnd_codecs->num))
8961987f3f5fa2f Kiran K 2021-09-07 173 goto error;
8961987f3f5fa2f Kiran K 2021-09-07 174
8961987f3f5fa2f Kiran K 2021-09-07 175 /* enumerate vendor codec capabilities */
8961987f3f5fa2f Kiran K 2021-09-07 176 for (i = 0; i < vnd_codecs->num; i++) {
8961987f3f5fa2f Kiran K 2021-09-07 177 caps.id = 0xFF;
8961987f3f5fa2f Kiran K 2021-09-07 178 caps.cid = vnd_codecs->codec[i].cid;
8961987f3f5fa2f Kiran K 2021-09-07 179 caps.vid = vnd_codecs->codec[i].vid;
8961987f3f5fa2f Kiran K 2021-09-07 180 caps.direction = 0x00;
828cea2b71de501 Chethan T N 2022-11-22 181 hci_read_codec_capabilities(hdev,
828cea2b71de501 Chethan T N 2022-11-22 182 LOCAL_CODEC_ACL_MASK | LOCAL_CODEC_SCO_MASK, &caps);
8961987f3f5fa2f Kiran K 2021-09-07 183 }
8961987f3f5fa2f Kiran K 2021-09-07 184
8961987f3f5fa2f Kiran K 2021-09-07 185 error:
8961987f3f5fa2f Kiran K 2021-09-07 186 kfree_skb(skb);
8961987f3f5fa2f Kiran K 2021-09-07 187 }
9ae664028a9ea83 Kiran K 2021-09-07 188
9ae664028a9ea83 Kiran K 2021-09-07 189 void hci_read_supported_codecs_v2(struct hci_dev *hdev)
9ae664028a9ea83 Kiran K 2021-09-07 190 {
9ae664028a9ea83 Kiran K 2021-09-07 191 struct sk_buff *skb;
9ae664028a9ea83 Kiran K 2021-09-07 192 struct hci_rp_read_local_supported_codecs_v2 *rp;
9ae664028a9ea83 Kiran K 2021-09-07 193 struct hci_std_codecs_v2 *std_codecs;
9ae664028a9ea83 Kiran K 2021-09-07 194 struct hci_vnd_codecs_v2 *vnd_codecs;
9ae664028a9ea83 Kiran K 2021-09-07 195 struct hci_op_read_local_codec_caps caps;
9ae664028a9ea83 Kiran K 2021-09-07 196 __u8 i;
9ae664028a9ea83 Kiran K 2021-09-07 197
828cea2b71de501 Chethan T N 2022-11-22 198 skb = __hci_cmd_sync_sk(hdev, HCI_OP_READ_LOCAL_CODECS_V2, 0, NULL,
828cea2b71de501 Chethan T N 2022-11-22 199 0, HCI_CMD_TIMEOUT, NULL);
9ae664028a9ea83 Kiran K 2021-09-07 200
9ae664028a9ea83 Kiran K 2021-09-07 201 if (IS_ERR(skb)) {
9ae664028a9ea83 Kiran K 2021-09-07 202 bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
9ae664028a9ea83 Kiran K 2021-09-07 203 PTR_ERR(skb));
9ae664028a9ea83 Kiran K 2021-09-07 204 return;
9ae664028a9ea83 Kiran K 2021-09-07 205 }
9ae664028a9ea83 Kiran K 2021-09-07 206
9ae664028a9ea83 Kiran K 2021-09-07 207 if (skb->len < sizeof(*rp))
9ae664028a9ea83 Kiran K 2021-09-07 208 goto error;
9ae664028a9ea83 Kiran K 2021-09-07 209
9ae664028a9ea83 Kiran K 2021-09-07 210 rp = (void *)skb->data;
9ae664028a9ea83 Kiran K 2021-09-07 211
9ae664028a9ea83 Kiran K 2021-09-07 212 if (rp->status)
9ae664028a9ea83 Kiran K 2021-09-07 213 goto error;
9ae664028a9ea83 Kiran K 2021-09-07 214
9ae664028a9ea83 Kiran K 2021-09-07 215 skb_pull(skb, sizeof(rp->status));
9ae664028a9ea83 Kiran K 2021-09-07 216
9ae664028a9ea83 Kiran K 2021-09-07 217 std_codecs = (void *)skb->data;
9ae664028a9ea83 Kiran K 2021-09-07 218
9ae664028a9ea83 Kiran K 2021-09-07 219 /* check for payload data length before accessing */
9ae664028a9ea83 Kiran K 2021-09-07 @220 if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
9ae664028a9ea83 Kiran K 2021-09-07 221 + sizeof(std_codecs->num))
9ae664028a9ea83 Kiran K 2021-09-07 222 goto error;
9ae664028a9ea83 Kiran K 2021-09-07 223
9ae664028a9ea83 Kiran K 2021-09-07 224 memset(&caps, 0, sizeof(caps));
9ae664028a9ea83 Kiran K 2021-09-07 225
9ae664028a9ea83 Kiran K 2021-09-07 @226 for (i = 0; i < std_codecs->num; i++) {
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] Bluetooth: hci-core: fix "declaration does not declare anything" error
@ 2026-08-21 18:13 kernel test robot
0 siblings, 0 replies; 3+ messages in thread
From: kernel test robot @ 2026-08-21 18:13 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp
::::::
:::::: 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
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