Transform zero-length arrays `rate`, `adm_stat` and `msdu_cnt` into
proper flexible-array members in anonymous union in `struct
mt7996_mcu_all_sta_info_event` via the DECLARE_FLEX_ARRAY()
helper; and fix multiple -Warray-bounds warnings:
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:544:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:551:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:553:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:530:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:538:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:540:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:520:57: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
This results in no differences in binary output, helps with the ongoing
efforts to globally enable -Warray-bounds.
Reviewed-by: Kees Cook <[email protected]>
Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
Changes in v2:
- Add Kees' RB tag.
- Transform zero-length array `rate` into flex-array member.
- Address five more -Warray-bounds warnings introduced by fake
flexible array `rate`
drivers/net/wireless/mediatek/mt76/mt7996/mcu.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
index 3e013b20ee5e..36cacc495c75 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.h
@@ -206,20 +206,20 @@ struct mt7996_mcu_all_sta_info_event {
u8 rsv3[4];
union {
- struct all_sta_trx_rate rate[0];
- struct {
+ DECLARE_FLEX_ARRAY(struct all_sta_trx_rate, rate);
+ DECLARE_FLEX_ARRAY(struct {
__le16 wlan_idx;
u8 rsv[2];
__le32 tx_bytes[IEEE80211_NUM_ACS];
__le32 rx_bytes[IEEE80211_NUM_ACS];
- } adm_stat[0] __packed;
+ } __packed, adm_stat);
- struct {
+ DECLARE_FLEX_ARRAY(struct {
__le16 wlan_idx;
u8 rsv[2];
__le32 tx_msdu_cnt;
__le32 rx_msdu_cnt;
- } msdu_cnt[0] __packed;
+ } __packed, msdu_cnt);
} __packed;
} __packed;
--
2.34.1
"Gustavo A. R. Silva" <[email protected]> wrote:
> Transform zero-length arrays `rate`, `adm_stat` and `msdu_cnt` into
> proper flexible-array members in anonymous union in `struct
> mt7996_mcu_all_sta_info_event` via the DECLARE_FLEX_ARRAY()
> helper; and fix multiple -Warray-bounds warnings:
>
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:544:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:551:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:553:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:530:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:538:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:540:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:520:57: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
>
> This results in no differences in binary output, helps with the ongoing
> efforts to globally enable -Warray-bounds.
>
> Reviewed-by: Kees Cook <[email protected]>
> Signed-off-by: Gustavo A. R. Silva <[email protected]>
I'll take this directly wireless-next, ok?
--
https://patchwork.kernel.org/project/linux-wireless/patch/ZXiU9ayVCslt3qiI@work/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
On 12/15/23 07:29, Kalle Valo wrote:
> "Gustavo A. R. Silva" <[email protected]> wrote:
>
>> Transform zero-length arrays `rate`, `adm_stat` and `msdu_cnt` into
>> proper flexible-array members in anonymous union in `struct
>> mt7996_mcu_all_sta_info_event` via the DECLARE_FLEX_ARRAY()
>> helper; and fix multiple -Warray-bounds warnings:
[..]
>>
>> This results in no differences in binary output, helps with the ongoing
>> efforts to globally enable -Warray-bounds.
>>
>> Reviewed-by: Kees Cook <[email protected]>
>> Signed-off-by: Gustavo A. R. Silva <[email protected]>
>
> I'll take this directly wireless-next, ok?
>
Yep, sounds good.
Thanks!
--
Gustavo
"Gustavo A. R. Silva" <[email protected]> wrote:
> Transform zero-length arrays `rate`, `adm_stat` and `msdu_cnt` into
> proper flexible-array members in anonymous union in `struct
> mt7996_mcu_all_sta_info_event` via the DECLARE_FLEX_ARRAY()
> helper; and fix multiple -Warray-bounds warnings:
>
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:544:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:551:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:553:58: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:530:61: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:538:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:540:66: warning: array subscript <unknown> is outside array bounds of 'struct <anonymous>[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:520:57: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
> drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:526:76: warning: array subscript <unknown> is outside array bounds of 'struct all_sta_trx_rate[0]' [-Warray-bounds=]
>
> This results in no differences in binary output, helps with the ongoing
> efforts to globally enable -Warray-bounds.
>
> Reviewed-by: Kees Cook <[email protected]>
> Signed-off-by: Gustavo A. R. Silva <[email protected]>
Patch applied to wireless-next.git, thanks.
40d51f70f082 wifi: mt76: mt7996: Use DECLARE_FLEX_ARRAY() and fix -Warray-bounds warnings
--
https://patchwork.kernel.org/project/linux-wireless/patch/ZXiU9ayVCslt3qiI@work/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches