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authorThomas Pedersen <thomas@adapt-ip.com>2020-10-05 19:51:22 +0300
committerJohannes Berg <johannes.berg@intel.com>2020-10-08 11:41:24 +0300
commitc1cd35c6060140cebf85f43f8c702abef9eca997 (patch)
tree61745484d1da727b1d4a24249e0f309f7362dd70 /net/wireless/chan.c
parent12bf8fad4ca3cf712f80766be017a521757e14c7 (diff)
downloadlinux-c1cd35c6060140cebf85f43f8c702abef9eca997.tar.xz
cfg80211: only allow S1G channels on S1G band
As discovered by syzbot, cfg80211 was accepting S1G channel widths on non-S1G bands. Add a check for this, and consolidate the 1MHz frequency check as it ends up being a subset of the others. Reported-by: syzbot+92715a0eccd6c881bc32@syzkaller.appspotmail.com Fixes: 11b34737b18a ("nl80211: support setting S1G channels") Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com> Link: https://lore.kernel.org/r/20201005165122.17583-1-thomas@adapt-ip.com Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/chan.c')
-rw-r--r--net/wireless/chan.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 96e24ee4c7e8..22d1779ab2b1 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -207,7 +207,6 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
control_freq = chandef->chan->center_freq;
switch (chandef->width) {
- case NL80211_CHAN_WIDTH_1:
case NL80211_CHAN_WIDTH_5:
case NL80211_CHAN_WIDTH_10:
case NL80211_CHAN_WIDTH_20:
@@ -218,10 +217,14 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
if (chandef->center_freq2)
return false;
break;
+ case NL80211_CHAN_WIDTH_1:
case NL80211_CHAN_WIDTH_2:
case NL80211_CHAN_WIDTH_4:
case NL80211_CHAN_WIDTH_8:
case NL80211_CHAN_WIDTH_16:
+ if (chandef->chan->band != NL80211_BAND_S1GHZ)
+ return false;
+
control_freq = ieee80211_channel_to_khz(chandef->chan);
oper_freq = ieee80211_chandef_to_khz(chandef);
control_width = nl80211_chan_width_to_mhz(