From: Johannes Berg johannes.berg@intel.com
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 digetx@gmail.com Tested-by: Dmitry Osipenko digetx@gmail.com Link: https://lore.kernel.org/r/1569239475-I2dcce394ecf873376c386a78f31c2ec8b538fa... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/wireless/nl80211.c | 4 +++- net/wireless/reg.c | 2 +- net/wireless/wext-compat.c | 2 +- 3 files changed, 5 insertions(+), 3 deletions(-)
--- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1934,6 +1934,8 @@ static int nl80211_parse_chandef(struct
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; @@ -2402,7 +2404,7 @@ static int nl80211_send_iface(struct sk_
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) { --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1604,7 +1604,7 @@ static void reg_call_notifier(struct wip
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;
--- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -821,7 +821,7 @@ static int cfg80211_wext_giwfreq(struct { 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) {