From: Johannes Berg Date: Mon, 23 Sep 2019 11:51:16 +0000 (+0200) Subject: cfg80211: initialize on-stack chandefs X-Git-Tag: v4.9.197~79 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eec7ef3096bfbf58c3a4ce4cf822605ead62ccb7;p=platform%2Fkernel%2Flinux-amlogic.git cfg80211: initialize on-stack chandefs commit f43e5210c739fe76a4b0ed851559d6902f20ceb1 upstream. In a few places we don't properly initialize on-stack chandefs, resulting in EDMG data to be non-zero, which broke things. Additionally, in a few places we rely on the driver to init the data completely, but perhaps we shouldn't as non-EDMG drivers may not initialize the EDMG data, also initialize it there. Cc: stable@vger.kernel.org Fixes: 2a38075cd0be ("nl80211: Add support for EDMG channels") Reported-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Link: https://lore.kernel.org/r/1569239475-I2dcce394ecf873376c386a78f31c2ec8b538fa25@changeid Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index d6e629315..c613be6 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2069,6 +2069,8 @@ static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev, control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); + memset(chandef, 0, sizeof(*chandef)); + chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq); chandef->width = NL80211_CHAN_WIDTH_20_NOHT; chandef->center_freq1 = control_freq; @@ -2538,7 +2540,7 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag if (rdev->ops->get_channel) { int ret; - struct cfg80211_chan_def chandef; + struct cfg80211_chan_def chandef = {}; ret = rdev_get_channel(rdev, wdev, &chandef); if (ret == 0) { diff --git a/net/wireless/reg.c b/net/wireless/reg.c index d137834..44befe9 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1564,7 +1564,7 @@ static void reg_call_notifier(struct wiphy *wiphy, static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) { - struct cfg80211_chan_def chandef; + struct cfg80211_chan_def chandef = {}; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); enum nl80211_iftype iftype; diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index a220156..b3baa34 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -799,7 +799,7 @@ static int cfg80211_wext_giwfreq(struct net_device *dev, { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); - struct cfg80211_chan_def chandef; + struct cfg80211_chan_def chandef = {}; int ret; switch (wdev->iftype) {