Commit 80e5b06a authored by Zhu Yi's avatar Zhu Yi Committed by John W. Linville
Browse files

cfg80211: fix NULL dereference in IBSS SIOCGIWAP 



This patch avoids memcpy from wdev->wext.ibss.bssid if it is NULL.
This could happen if we SIOCGIWAP before SIOCSIWAP.

Signed-off-by: default avatarZhu Yi <yi.zhu@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent f874011b

net/wireless/ibss.c

+4 −1
Original line number Diff line number Diff line
@@ -487,8 +487,11 @@ int cfg80211_ibss_wext_giwap(struct net_device *dev, 
	wdev_lock(wdev);

	if (wdev->current_bss)

		memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);

	else

	else if (wdev->wext.ibss.bssid)

		memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);

	else

		memset(ap_addr->sa_data, 0, ETH_ALEN);



	wdev_unlock(wdev);



	return 0;