UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: a4a5a430b0 ("mt76: mt7615: fix TSF configuration")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Colin Ian King 2021-04-19 14:20:32 +01:00 committed by Felix Fietkau
parent dc5d5f9d3f
commit 4a52d6abb1
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c
View File

@ -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);