From: Johannes Berg johannes.berg@intel.com
[ Upstream commit f971e1887fdb3ab500c9bebf4b98f62d49a20655 ]
This accesses the wdev's chandef etc., so cannot safely be used without holding the lock.
Signed-off-by: Johannes Berg johannes.berg@intel.com Link: https://lore.kernel.org/r/20220506102136.06b7205419e6.I2a87c05fbd8bc5e565e84... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/wireless/nl80211.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 06a35f1bec23..0c20df052db3 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -11573,18 +11573,23 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb, struct cfg80211_bitrate_mask mask; struct cfg80211_registered_device *rdev = info->user_ptr[0]; struct net_device *dev = info->user_ptr[1]; + struct wireless_dev *wdev = dev->ieee80211_ptr; int err;
if (!rdev->ops->set_bitrate_mask) return -EOPNOTSUPP;
+ wdev_lock(wdev); err = nl80211_parse_tx_bitrate_mask(info, info->attrs, NL80211_ATTR_TX_RATES, &mask, dev, true); if (err) - return err; + goto out;
- return rdev_set_bitrate_mask(rdev, dev, NULL, &mask); + err = rdev_set_bitrate_mask(rdev, dev, NULL, &mask); +out: + wdev_unlock(wdev); + return err; }
static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)