| Message ID | a882942479ff8f20189580a69174202b40210682.1670396836.git.ryder.lee@mediatek.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Felix Fietkau |
| Headers | show |
| Series | [1/2] wifi: mt76: mt7996: fix unintended sign extension of mt7996_hw_queue_read() | expand |
diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c index 99b23aef53a5..3d4fbbbcc206 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c @@ -457,7 +457,7 @@ mt7996_hw_queue_read(struct seq_file *s, u32 size, if (val & BIT(map[i].index)) continue; - ctrl = BIT(31) | (map[i].pid << 10) | (map[i].qid << 24); + ctrl = BIT(31) | (map[i].pid << 10) | ((u32)map[i].qid << 24); mt76_wr(dev, MT_FL_Q0_CTRL, ctrl); head = mt76_get_field(dev, MT_FL_Q2_CTRL,
In the expression "map[i].qid << 24" starts as u8, but is promoted to "signed int", then sign-extended to type "unsigned long", which is not intended. Cast to u32 to avoid the sign extension. Reported-by: coverity-bot <keescook+coverity-bot@chromium.org> Addresses-Coverity-ID: 1527813 ("Integer handling issues") Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices") Signed-off-by: Ryder Lee <ryder.lee@mediatek.com> --- drivers/net/wireless/mediatek/mt76/mt7996/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)