From: Johannes Berg <johannes.berg@xxxxxxxxx>
This is needed now that all the driver callbacks are protected by
the wiphy lock rather than (just) the RTNL.
Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
Reported-by: syzbot+d2d412349f88521938aa@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/wireless/wext-compat.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 2e35cb78221e..0c6ea6212496 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -39,6 +39,7 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
struct cfg80211_registered_device *rdev;
struct vif_params vifparams;
enum nl80211_iftype type;
+ int ret;
rdev = wiphy_to_rdev(wdev->wiphy);
@@ -61,7 +62,11 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
memset(&vifparams, 0, sizeof(vifparams));
- return cfg80211_change_iface(rdev, dev, type, &vifparams);
+ wiphy_lock(wdev->wiphy);
+ ret = cfg80211_change_iface(rdev, dev, type, &vifparams);
+ wiphy_unlock(wdev->wiphy);
+
+ return ret;
}
EXPORT_WEXT_HANDLER(cfg80211_wext_siwmode);
--
2.26.2
