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| author | Colin Ian King <colin.king@canonical.com> | 2021-04-19 14:20:32 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2021-04-21 20:55:54 +0200 |
| commit | 4a52d6abb193aea0f2923a2c917502bd2d718630 (patch) | |
| tree | e896a7be7a60b2e4387e77c53d00eb352157b78a /drivers/net | |
| parent | dc5d5f9d3fe4d0c26b4e4beb25d056ffcc5fbf02 (diff) | |
| download | lwn-4a52d6abb193aea0f2923a2c917502bd2d718630.tar.gz lwn-4a52d6abb193aea0f2923a2c917502bd2d718630.zip | |
mt76: mt7615: Fix a dereference of pointer sta before it is null checked
Currently the assignment of idx dereferences pointer sta before
sta is null checked, leading to a potential null pointer dereference.
Fix this by assigning idx when it is required after the null check on
pointer sta.
Addresses-Coverity: ("Dereference before null check")
Fixes: a4a5a430b076 ("mt76: mt7615: fix TSF configuration")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c b/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c index 4a370b9f7a17..f8d3673c2cae 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c @@ -67,7 +67,7 @@ static int mt7663_usb_sdio_set_rates(struct mt7615_dev *dev, struct mt7615_rate_desc *rate = &wrd->rate; struct mt7615_sta *sta = wrd->sta; u32 w5, w27, addr, val; - u16 idx = sta->vif->mt76.omac_idx; + u16 idx; lockdep_assert_held(&dev->mt76.mutex); @@ -119,6 +119,7 @@ static int mt7663_usb_sdio_set_rates(struct mt7615_dev *dev, sta->rate_probe = sta->rateset[rate->rateset].probe_rate.idx != -1; + idx = sta->vif->mt76.omac_idx; idx = idx > HW_BSSID_MAX ? HW_BSSID_0 : idx; addr = idx > 1 ? MT_LPON_TCR2(idx): MT_LPON_TCR0(idx); |