| Message ID | f416b042ccb8adfa1873fd5968dd3c01231c400c.1598007098.git.lorenzo@kernel.org (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Felix Fietkau |
| Headers | show |
| Series | mt76: fix a possible NULL pointer dereference in mt76_testmode_dump | expand |
diff --git a/drivers/net/wireless/mediatek/mt76/testmode.c b/drivers/net/wireless/mediatek/mt76/testmode.c index 75bb02cdfdae..5bd6ac1ba3b5 100644 --- a/drivers/net/wireless/mediatek/mt76/testmode.c +++ b/drivers/net/wireless/mediatek/mt76/testmode.c @@ -442,9 +442,13 @@ int mt76_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *msg, mutex_lock(&dev->mutex); if (tb[MT76_TM_ATTR_STATS]) { + err = -EINVAL; + a = nla_nest_start(msg, MT76_TM_ATTR_STATS); - err = mt76_testmode_dump_stats(dev, msg); - nla_nest_end(msg, a); + if (a) { + err = mt76_testmode_dump_stats(dev, msg); + nla_nest_end(msg, a); + } goto out; }
Fix a possible NULL pointer dereference in mt76_testmode_dump() since nla_nest_start returns NULL in case of error Fixes: f0efa8621550e ("mt76: add API for testmode support") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> --- drivers/net/wireless/mediatek/mt76/testmode.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)