A new warning in clang [1] points out a couple of places where a hdr
variable is not initialized then passed along to skb_put_data().
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:1894:21: warning: variable 'hdr' is uninitialized when passed as a const pointer argument here [-Wuninitialized-const-pointer]
1894 | skb_put_data(skb, &hdr, sizeof(hdr));
| ^~~
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c:3386:21: warning: variable 'hdr' is uninitialized when passed as a const pointer argument here [-Wuninitialized-const-pointer]
3386 | skb_put_data(skb, &hdr, sizeof(hdr));
| ^~~
Zero initialize these headers as done in other places in the driver when
there is nothing stored in the header.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Link: https://github.com/llvm/llvm-project/commit/00dacf8c22f065cb52efb14cd091d441f19b319e [1]
Closes: https://github.com/ClangBuiltLinux/linux/issues/2104
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
index 994526c65bfc..640abb4dce7f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c
@@ -1879,8 +1879,8 @@ mt7996_mcu_get_mmps_mode(enum ieee80211_smps_mode smps)
int mt7996_mcu_set_fixed_rate_ctrl(struct mt7996_dev *dev,
void *data, u16 version)
{
+ struct uni_header hdr = {};
struct ra_fixed_rate *req;
- struct uni_header hdr;
struct sk_buff *skb;
struct tlv *tlv;
int len;
@@ -3373,7 +3373,7 @@ int mt7996_mcu_set_hdr_trans(struct mt7996_dev *dev, bool hdr_trans)
{
struct {
u8 __rsv[4];
- } __packed hdr;
+ } __packed hdr = {};
struct hdr_trans_blacklist *req_blacklist;
struct hdr_trans_en *req_en;
struct sk_buff *skb;
---
base-commit: eb8352ee2d1e70f916fac02094dca2b435076fa4
change-id: 20250715-mt7996-fix-uninit-const-pointer-01e1dd03d444
Best regards,
--
Nathan Chancellor <nathan@xxxxxxxxxx>
